Topic

OPENAI

OpenAI products and APIs - GPT models, Codex, ChatGPT, and how to build with them.

131 resources - 125 posts, 6 tools

All TopicsOpenAICodex AI Agents News Developer Tools AI Coding Pricing AI Models ChatGPT

Blog Posts

Codex CLI 0.169: codex exec Trust, Side Chats and Model Providers

Codex CLI 0.169.0 keeps project config and MCP servers off in untrusted directories under codex exec, adds --trust, side-chat tabs and a model provider picker.

Nov 13, 20266 min read

Codex Training Setting Re-Enabled? Two Switches to Check

Developers report Codex model training turning itself back on. What OpenAI documents, the second "Include environments" switch most people miss, and a five-minute check.

Nov 4, 20266 min read

OpenAI Pando: The Git Backend Built for Codex-Scale Pushes

OpenAI built Pando, a Git-compatible backend, after Codex flooded its monorepo with pushes. What it changed, the trade-offs, and what it means for your agent fleet.

Nov 3, 20267 min read

GPT-6.1 Terra: $1/$5 Pricing, Benchmarks, and When to Pick It

GPT-6.1 Terra is OpenAI's new $1/$5 per million token model: 50.3% on Terminal-Bench 4.0 (vendor-reported), half Sol's price, and who should route to it.

Oct 27, 20267 min read

Codex CLI 0.164: /presets and Inline /model Flags

Codex CLI 0.164.0 adds ten /presets slots, inline /model and /permissions arguments, and credential masking for remote commands. What to try and what to check.

Oct 23, 20267 min read

Codex Reset: Banked vs Automatic vs Paid, and When to Use Each

Codex has three kinds of usage reset - banked, automatic and paid - and they move your weekly refresh date in different ways. What OpenAI documents, the 80% rule, and what to do Monday.

Oct 23, 20268 min read

OpenAI Models on Google Cloud: What Changes for Developers

OpenAI and Google Cloud put GPT-6 Astra, GPT-6.1 Sol and GPT-6 Luna into Model Garden in private preview, with Codex pointed at Gemini inference. What is live, what is "coming soon", and what to do before general availability.

Oct 22, 20266 min read

AI API 429, 529 and 503 Errors: Retry Rules That Match the Docs

Which 429, 529 and 503 errors to retry across OpenAI, Claude, Gemini and Bedrock, how to read Retry-After, and a typed wrapper that skips quota errors.

Oct 18, 202615 min read

AI Model Shutdown Dates 2026-2027: Calendar and Migration Plan

Every scheduled AI model API shutdown through mid 2027 by month: GPT-4o on Jan 14, whisper-1 on Feb 26, Claude Sonnet 4.5 on Nov 30, plus how to migrate.

Oct 18, 202617 min read

OpenAI Is Winding Down Fine-Tuning: Where to Move Your Fine-Tunes (October 2026)

OpenAI stops new fine-tuning jobs on January 6, 2027, and every base model it still lets you tune shuts down by January 14. The dates, what keeps serving, where fine-tuning still exists, which providers let you download weights, and a migration checklist.

Oct 18, 202612 min read

GPT-Live Decisions: Native Delegation and Transcript Triggers

GPT-Live can now call the Decisions API itself, mid-sentence. How native delegation and transcript triggers work, the session config, and the events to handle.

Oct 18, 20268 min read

Prompt Caching Across AI Providers: Prices, TTLs and Setup

Prompt caching across OpenAI, Anthropic, Gemini, DeepSeek, Mistral, xAI and Qwen: prices, TTLs, setup code. A reused 100K prefix costs 71-93% less.

Oct 18, 202613 min read

ChatGPT Plugin Extensions: Sidebar Apps, Panels and File Editors

ChatGPT plugins can now add sidebar apps, side panels, file editors and native forms. How openai/ui entrypoints work, with type-checked code.

Oct 17, 202614 min read

Codex CLI 0.163: Instant Steering Is Now the Default

Codex CLI 0.163.0 makes mid-response steering the default and adds searchable /config and a leader key. What changed and what to check before upgrading.

Oct 17, 20267 min read

Codex with GitLab: @codex Reviews and Tasks in Codex Cloud (Beta)

Codex cloud now reviews GitLab merge requests and runs @codex tasks in beta on all ChatGPT plans. Setup for GitLab.com and Self-Managed 19.0+.

Oct 17, 202612 min read

How to Use Codex Cloud Reusable Environments (2026 Guide)

Codex Cloud reusable environments: publish once, then start isolated tasks from web, desktop or mobile. Setup, secrets, CLI, limits and 8-16 GiB VMs.

Oct 17, 202613 min read

Codex MCP Server Removed: How to Migrate to the App Server

codex mcp-server is gone as of Codex CLI 0.154.0. Here is how to move an integration to the experimental app server and its JSON-RPC protocol.

Oct 17, 202613 min read

Context Engineering for Agents: Caching, Compaction, Subagents

Context engineering for agents, explained: caching, compaction, tool-result clearing, retrieval and subagents, with the exact Anthropic and OpenAI API knobs.

Oct 17, 202615 min read

Custom GPTs Retire Dec 11, 2026: How to Migrate to Plugins

Custom GPTs retire Dec 11, 2026. Instructions and files migrate to a ChatGPT plugin automatically; custom actions do not. Here is the developer plan.

Oct 17, 202612 min read

GPT Image 2.5 Sunburst and Flare: How to Use OpenAI's New Models

GPT Image 2.5 Sunburst and Flare add xhigh and max quality at GPT Image 2 token rates. Model IDs, type-checked code, costs and when to pick each.

Oct 17, 202610 min read

OpenAI Agents API Computer Use: Sessions, Approvals, Sign-in

OpenAI's Agents API can now operate web apps in a hosted session. Enable computer_use, approve each origin and handle sign-in in a five-minute window.

Oct 17, 202611 min read

OpenAI Agents SDK in Late 2026: What Is New in Python and TypeScript

OpenAI Agents SDK as of Python 0.24 and JS 0.22: sandbox agents, three guardrail layers, compaction sessions, MCP v2 and new defaults, with type-checked code.

Oct 17, 202616 min read

OpenAI Prompt-to-Voice: Create a GPT-Live Voice From Text

OpenAI prompt-to-voice turns a text description into a saved GPT-Live voice. Creating it is free, the limit is 100 per org, and it only works in GPT-Live.

Oct 17, 20267 min read

Tool Calling Under the Hood: Claude Messages vs OpenAI Responses

How tool calling works on the wire: JSON schema tools, parallel calls, tool_choice, strict mode and streaming deltas in Claude Messages vs OpenAI Responses.

Oct 17, 202615 min read

Migrate Off whisper-1 and gpt-4o-transcribe Before Feb 26, 2027

OpenAI shuts down whisper-1 and the gpt-4o transcribe models on Feb 26, 2027. Move files to gpt-transcribe ($0.0045/min) and live audio to gpt-live-transcribe.

Oct 17, 202616 min read

Codex 'gpt-5.5 Model Is Not Supported' Error: The Fix

Codex says gpt-5.5 is not supported with a ChatGPT account because OpenAI retired it from ChatGPT sign-in on October 14. The fix and what still works.

Oct 16, 20266 min read

Codex CLI Background Daemon: How to Turn It Off

Codex CLI starts a self-updating background daemon since 0.157.0. How to turn it off, the per-session --no-daemon flag, and what Codex CLI 0.167.0 changed.

Oct 12, 20267 min read

Codex CLI 0.162: Managed Worktrees and Pinned Tasks

Codex CLI 0.162 lets the agent create and list its own Git worktrees, adds pinned tasks and custom provider capability overrides. What to change this week.

Oct 10, 20267 min read

ChatGPT Free vs Go vs Plus After GPT-6: Which Model You Get

Free and Go ($8) both get GPT-6 Luna in Chat. Plus ($20) is the cheapest plan with GPT-6 Sol and full Codex. What each ChatGPT plan buys now.

Oct 9, 202610 min read

ChatGPT Plus vs Claude Pro for Developers (October 2026)

Both cost $20 a month. Plus meters Codex apart from chat and includes GPT-6 Astra; Claude Pro shares one pool with Claude Code. Which to pick.

Oct 9, 202610 min read

Cheapest Subagent Model: Haiku 5.5 or GPT-6 Luna? Routing, Compaction and Cost per Task

Which cheap model belongs under your orchestrator? Haiku 5.5 vs GPT-6 Luna as a subagent or worker: routing by prompt length, compaction, tool-call gotchas and cost per agent task.

Oct 9, 202615 min read

OpenAI Decisions API vs Jev vs Clef: Price, Speed, Which to Pick

OpenAI Decisions API costs $0.10 per million input tokens, 2.4x Jev. Pick Jev for cheap text decisions, Clef-flash for speed, Decisions API for images.

Oct 9, 20269 min read

$OpenAI Math Repo: What the Lean Proofs Do and Don't Verify$

OpenAI Math Repo: What the Lean Proofs Do and Don't Verify

OpenAI's math repo holds hundreds of model-written manuscripts, some with Lean proofs. What Lean verifies, what it misses, and the lesson for agent output.

Oct 8, 20267 min read

Sign in with ChatGPT: Run Coding Agents on Your Plan (2026)

Sign in with ChatGPT lets coding agents spend your Plus or Pro plan allowance instead of an API key. How the OAuth flow works and the per-app cap to set first.

Oct 7, 20268 min read

OpenAI DevDay 2026 Recap: What Shipped and What to Test

Everything OpenAI announced at DevDay 2026: GPT-6.1 Sol at $2/$10, Ultrafast, Decisions API, Agents API, cloud Codex, and what to test first.

Oct 2, 20268 min read

OpenAI Dots: Always-On Agents Need a Control Plane

OpenAI Dots turns ChatGPT into a long-running work agent. For developers, the real question is where approvals, permissions and sandboxes sit.

Sep 30, 20267 min read

GPT-6.1 Sol Release Guide: Near-Astra Agentic Work at $2/$10 and $0.10 Cache Reads

GPT-6.1 Sol release guide: near-Astra scores at a fifth of Astra's price, $0.10 cache reads, verified pricing, the Astra 6.1 safety hold, and how to run it.

Sep 29, 20267 min read

Codex Usage Limits and Pricing in 2026: Pro 100, Pro 200, Pro 500, Resets, and 'Model at Capacity' Errors

Codex usage limits and pricing per ChatGPT plan: what Plus, Pro $200 and Pro $500 buy, how resets work, and what to do about 'Selected model is at capacity'.

Sep 28, 202614 min read

GPT-6 Astra Release Guide: Benchmarks, $10/$50 Pricing, and How to Run It in Codex and OpenCode

GPT-6 Astra release guide: OpenAI's max-capability model, its $10/$50 pricing and 1.05M context, what the benchmarks do and do not say, and commands to try it.

Sep 28, 20268 min read

GPT-6 in 7 Minutes: Astra, Sol, and Luna Explained for Developers

GPT-6 in 7 minutes: what Astra, Sol and Luna are, what each tier costs per million tokens, the new API features, and how to try each one in Codex and the API.

Sep 28, 20267 min read

OpenAI DevDay 2026: What to Expect - Confirmed, Reported, and Rumored

OpenAI DevDay 2026 runs September 29 at Fort Mason in San Francisco. What OpenAI has confirmed, what outlets have reported, and what is still only rumor.

Sep 28, 20268 min read

OpenAI Paused Training Again: How an Agent Reached the Internet Through DNS

An OpenAI agent escaped its sandbox through DNS to reach an external chatbot. The timeline, the safeguards that failed, and why tool-use training is paused.

Sep 28, 20266 min read

OpenAI's Misalignment Reports Are an Agent Operations Signal

OpenAI's model-misalignment reporting framework doubles as an agent operations template: incident intake, severity labels, and evidence-led disclosure.

Sep 19, 20268 min read

Codex CLI Worktrees Turn Agent Runs Into Durable Sessions

Codex CLI 0.154.0 adds experimental worktrees, inline answers and approval hardening. Why durable agent workspace control matters more than the model picker.

Sep 10, 20267 min read

OpenAI Hugging Face Incident Report: What 1,200 Agents Did

OpenAI and METR's Hugging Face incident reports: 1,200 agents shared a message board, 700 attacked Hugging Face, and about 7% of transcripts were spoofed.

Aug 26, 20267 min read

Codex Computer History Turns Repeated Work Into Reusable Skills

Codex Computer History gives agents a rolling local view of your work across apps. How it works, how to turn observed workflows into skills, and privacy limits.

Aug 23, 20268 min read

OpenAI's Daybreak Cyber Models Land on Amazon Bedrock: GPT-5.6-Cyber Gets Its First Cloud Path

OpenAI Daybreak cyber models are on Amazon Bedrock: GPT-5.6-Cyber and GPT-5.6 Sol for eligible customers, gated by Trusted Access for Cyber enrollment.

Aug 12, 20267 min read

OpenAI Enterprise Signals: The Agentic Gap Is Now Measurable, and It Is Not About Models

OpenAI Enterprise Signals data: Codex drives 64% of enterprise output tokens and frontier firms generate 8.3x the tokens per user of typical firms.

Aug 12, 20267 min read

OpenAI Ships GPT-5.6-Cyber Through Daybreak Red: The Numbers, the Chrome CVE, and What Access Looks Like

GPT-5.6-Cyber is OpenAI's gated security model, available only through Daybreak Red. The benchmark numbers, the Chrome V8 CVE it found, and who gets access.

Aug 10, 20268 min read

OpenAI Says It Can't Rule Out Critical Cyber Capability for Astra, a First for the Preparedness Framework

OpenAI cannot rule out Critical cyber capability for its upcoming Astra model, a Preparedness Framework first. What it changes for teams running coding agents.

Aug 7, 20267 min read

OpenAI Retunes GPT-5.6 Sol in ChatGPT and Makes Luna the Free Tier Default

OpenAI retuned GPT-5.6 Sol for ChatGPT and made GPT-5.6 Luna the Free and Go default. What changed in chat, what stayed the same in the API, and why.

Aug 6, 20267 min read

How OpenAI Built GPT-Live: Full-Duplex Voice, WARP, and the Death of the Turn Detector

How OpenAI built GPT-Live: a full-duplex voice model with no turn detector, Go on the media path, stateful handoffs, and the new WARP WebRTC transport.

Aug 3, 20268 min read

OpenAI Publishes Ten Decade-Open Math Proofs, Each Formalized in Lean

OpenAI's Astra model produced results on ten decade-old math problems, including Erdős problems, each with a Lean 4 certificate. What shipped and why.

Aug 1, 20266 min read

AI Session Portability Compared 2026: OpenAI vs Anthropic vs Gemini

AI session portability compared across OpenAI, Anthropic, and Gemini: storage defaults, encrypted reasoning, compaction, and what you can move or audit.

Jul 31, 202611 min read

Budget AI Coding Models, October 2026: Haiku 5.5 vs GPT-6 Luna

Claude Haiku 5.5 and GPT-6 Luna both list at $0.10/$0.50 per MTok. The price tie breaks at Haiku's 100K cliff, and Anthropic's benchmarks favor Haiku. Checked Oct 8, 2026.

Jul 31, 202611 min read

OpenAI's Efficiency Ledger: Serving Costs Down 20%, ARC-AGI-3 Up 3x With No Model Change

The OpenAI "Building abundant intelligence" essay puts numbers on efficiency: 20% lower serving costs and a 3x ARC-AGI-3 jump from two settings alone.

Jul 31, 20267 min read

OpenAI Disrupts a Cambodia Scam Network That Ran on ChatGPT

OpenAI disrupted a Cambodia scam network that ran on ChatGPT for personas, translation, forged documents and admin work. How LLMs slot into organized fraud.

Jul 31, 20267 min read

OpenAI Cuts GPT-5.6 Luna by 80%: The Price-Performance Frontier Just Shifted

OpenAI slashes GPT-5.6 Luna by 80% to $0.20/M input tokens, cuts Terra by 20%, adds Sol Fast mode at 2.5x speed, and reveals Sol autonomously optimized its own production kernels.

Jul 30, 20267 min read

AI Model Routing Strategies for Cost-Effective Coding in 2026

AI model routing for cost-effective coding: pick Claude, GPT-5.6 or Kimi tiers by task complexity, cost and latency, with decision frameworks and code.

Jul 30, 202610 min read

OpenAI Cuts GPT-5.6 Luna 80% and Terra 20%: The Cost-Per-Task Math for Agent Builders

GPT-5.6 Luna drops 80% to $0.20/$1.20 per million tokens and Terra 20% to $2/$12. The cost-per-task math for agent builders, Codex quotas and rivals.

Jul 30, 20268 min read

OpenAI Open-Sourced Codex Security: What HN Thinks

Codex Security CLI and TypeScript SDK are now open source. What the repo contains and what HN says about scan cost, guardrails and local model support.

Jul 29, 20267 min read

GPT-5.6 Closes 30-Year Gap in Convex Optimization Theory

GPT-5.6 helped produce a Lean-verified proof closing a 1996 gap in derivative-free convex optimization. How the 10-page expert prompt worked, and what HN said.

Jul 18, 20265 min read

Codex Hits 8 Million Users: What the GPT-5.6 Surge Means for Developers

Codex and ChatGPT Work hit 8 million active users after GPT-5.6 launched. What drove the surge, what changed for developers, and what to watch next.

Jul 15, 20267 min read

Codex Now Encrypts Multi-Agent Prompts, Breaking Local Auditability

OpenAI's Codex CLI now encrypts inter-agent communications for Sol and Terra models, leaving users unable to inspect what their agents are actually doing.

Jul 14, 20265 min read

Apple Sues OpenAI Over Alleged Trade Secret Theft

Apple sues OpenAI over alleged trade secret theft: what the complaint says about former employees Tang Tan and Chang Liu, the hardware angle, and HN reactions.

Jul 10, 20268 min read

GPT-5.6 Sol Ultra Produces Proof of the Cycle Double Cover Conjecture

GPT-5.6 Sol Ultra proof of the Cycle Double Cover Conjecture: what OpenAI claims, the prompt it used, and why mathematicians are still verifying the result.

Jul 10, 20265 min read

ChatGPT Work and Codex Now Share One Desktop App: What Actually Changed

OpenAI is consolidating its desktop apps, not merging ChatGPT and Codex into one indistinguishable product. Here is how ChatGPT Work, Codex, and GPT-5.6 fit together.

Jul 9, 20268 min read

GPT-5.6 Sol, Terra, and Luna: A Developer's Guide to OpenAI's New Model Family

A practical guide to choosing GPT-5.6 Sol, Terra, and Luna, using programmatic tool calling, caching, and the multi-agent beta in production.

Jul 9, 20268 min read

GPT-5.6 Sol Ultra Coming to Codex with Cooperative Subagents

GPT-5.6 Sol Ultra is coming to Codex with trained subagents that communicate during tasks, reportedly hitting 91.9% on Terminal-Bench 2.1. What HN thinks.

Jul 6, 20265 min read

Non-Developers Using AI Agents Need Platform Engineering

Non-developers using AI agents need platform engineering. What OpenAI's workplace agent data signals, and the paved paths, policy and receipts teams need.

Jul 2, 20267 min read

Codex Record & Replay: Turn Screen Recordings Into Reusable Automation Skills

Codex Record & Replay companion guide: record a recurring computer task once in OpenAI Codex and replay it as a reusable automation skill, plus where it fits.

Jul 1, 20266 min read

GPT-5.5 in 7 Minutes: Benchmarks, Codex Agents, Context Window, and Pricing

GPT-5.5 in 7 minutes: a companion guide to the video review of the new OpenAI model in ChatGPT and Codex - benchmarks, Codex agents, context window and pricing.

Jul 1, 20266 min read

OpenAI Codex in 7 Minutes: The Desktop App, Plan Modes, and Multi-Agent Workflows

OpenAI Codex in 7 minutes: a companion guide to the video tour of the Codex desktop app, plan and goal modes, plugins, multi-agent workflows and UI annotation.

Jul 1, 20266 min read

OpenAI's June API Updates Are Really a Control-Plane Upgrade

OpenAI June 2026 API updates as an agent control plane: workload identity, Admin APIs, Secure MCP Tunnel, moderation scores, billing and cache retention.

Jun 28, 20268 min read

Codex-Maxxing: How to Run Long-Running Codex Workflows Without Losing the Plot

Codex-Maxxing done right is bounded autonomy: AGENTS.md, small worktrees, explicit stop conditions and review checkpoints for long-running Codex workflows.

Jun 23, 20268 min read

OpenAI Agent Builder and Evals Are Shutting Down: Move the Agent Stack Into Code

OpenAI Agent Builder, hosted Evals and reusable prompts shut down November 30. A migration plan to the Agents SDK, repo-owned prompts and eval receipts.

Jun 23, 20268 min read

OpenAI Daybreak Shows the AppSec Bottleneck Is Patching, Not Finding

OpenAI Daybreak and Patch the Planet show the agentic AppSec bottleneck is patching. Security agents matter when they ship validated fixes maintainers merge.

Jun 23, 20268 min read

Codex Logging Bug Can Write Terabytes to Your SSD

A Codex CLI SQLite logging bug wrote TRACE logs that could wear out SSDs. What caused it, the merged fixes, and what to check if you run Codex heavily.

Jun 22, 20265 min read

Noam Shazeer Joins OpenAI After Two Years Back at Google

The Transformer co-creator leaves Google DeepMind for OpenAI just two years after Google paid $2.7 billion to bring him back from Character.AI.

Jun 18, 20265 min read

Codex Gets Computer Use in the EU - and a Clean Claude Code Import

Codex Computer Use is now available in the EEA, UK and Switzerland, and Codex CLI 0.140.0 adds a selective Claude Code import. What shipped, per the changelog.

Jun 17, 20267 min read

LLM API Pricing, October 2026: Claude vs OpenAI vs Gemini

LLM API pricing for October 2026 per million tokens: Claude Haiku 5.5, Sonnet 5.5, Opus 5.5 and Fable 5.1 vs GPT-6, Gemini and DeepSeek, plus the caveats.

Jun 11, 202612 min read

The Mid-Tier Shootout: GPT-5.4 vs Gemini 3.1 Pro vs DeepSeek V4 Pro

GPT-5.4 vs Gemini 3.1 Pro vs DeepSeek V4: pricing, benchmarks, context behavior, and license terms for the mid-tier models that carry most production traffic.

Jun 11, 202611 min read

GPT-5.6 Sol vs Claude Opus 5: The $5 Workhorse Head-to-Head

GPT-5.6 Sol vs Claude Opus 5: both cost $5 per million input tokens, so the workhorse-tier decision comes down to output pricing, benchmarks, and tooling.

Jun 11, 202611 min read

Migrating Off Retired GPT Models in 2026: A Working Checklist

Migrating off retired GPT models in 2026: the live retirement table, what maps to what, an eval-before-switch day plan, and when to jump providers.

Jun 11, 202610 min read

Codex in June 2026: What Changed Since the Spring Wave

Codex changelog for April to June 2026: GPT-5.5, Goal mode going stable, the Chrome extension, iOS access, Bedrock support and Sites, and what each means.

Jun 10, 20269 min read

Codex Exec in CI: Practical Guide to Headless OpenAI Agents

codex exec is OpenAI's non-interactive mode to run Codex agents from scripts, CI and GitHub Actions. How to set it up safely with real flags and working YAML.

Jun 10, 20269 min read

OpenAI Agents SDK vs Claude Agent SDK: Building Agents on the Two Big Platforms

OpenAI Agents SDK vs Claude Agent SDK compared - handoffs vs subagents, guardrails vs hooks, sandboxing, MCP support and how to choose a platform for your team.

Jun 10, 20269 min read

The TypeScript AI Agent Stack in Mid-2026: Mastra vs Vercel AI SDK vs OpenAI Agents SDK vs LangGraph.js

The TypeScript AI agent stack compared - Mastra, Vercel AI SDK, OpenAI Agents SDK and LangGraph.js, which layer each covers, and how to pick or combine them.

Jun 10, 202610 min read

Spreadsheet Agents Need Permission Ledgers

The ChatGPT for Google Sheets exfiltration report shows spreadsheet agents need permission ledgers: action-scoped, logged, revocable, and visible permissions.

Jun 1, 20268 min read

Codex CLI Vim Mode Is an Ergonomics Signal

Codex CLI 0.129.0 added modal Vim editing to the composer. A small feature, but a signal: terminal agents are becoming native engineering workbenches.

May 14, 20266 min read

Codex Automations: Where Scheduled AI Agents Actually Help

Codex automations are useful when recurring engineering work has clear inputs, reviewable outputs, and safe boundaries. Here is the practical playbook.

May 5, 20269 min read

Codex Is Becoming a General-Purpose AI Agent, Not Just a Coding Tool

OpenAI is turning Codex from a coding assistant into a broader agent workspace for files, apps, browser QA, images, automations, and repeatable knowledge work.

May 5, 20268 min read

Codex SDK vs CLI vs GitHub Action: Which Surface Should You Build On?

Codex SDK vs Codex CLI vs the Codex GitHub Action: when to use each surface, and how to avoid building the same agent loop three times.

May 5, 20268 min read

GPT Image 2 Prompt Libraries Are Becoming Production Infrastructure

GPT Image 2 prompt libraries are turning into production infrastructure: repeatable visual systems, agent-friendly templates and cheaper creative iteration.

May 5, 20267 min read

Karpathy's Loopy Era Is the Best Way to Understand Codex

Andrej Karpathy's loopy era frame explains why Codex is becoming less like a chatbot and more like an agent loop manager for real software work.

May 5, 20269 min read

OpenAI's Codex Mac Certificate Deadline Is a Runbook Test

OpenAI's May 8 macOS certificate rotation for ChatGPT, Codex, Codex CLI and Atlas, and a runbook for how teams should govern AI developer tool updates.

May 5, 20267 min read

Codex Changelog April 2026: Goals, Browser Use, GPT-5.5, and Safer Agents

The April 2026 Codex changelog explained: persisted goals, browser verification, automatic approval reviews, plugins, and permission profiles.

May 2, 20269 min read

Codex /goal and Claude Managed Outcomes: The New Control Loops

Codex /goal vs Claude Managed Agents outcomes compared: where each control loop fits, the tradeoffs, and when to combine them for long-running tasks.

May 2, 202618 min read

OpenAI Codex, Managed Agents, and AWS: What Developers Should Watch

OpenAI is moving Codex from a coding assistant into an enterprise agent platform. Here is what changed with Codex, Managed Agents, AWS, and the Responses API.

May 2, 20268 min read

OpenAI Agents SDK Evolution: What Ships in Production

Sandbox agents, file-based memory and Codex-style filesystem tools in the OpenAI Agents SDK: what the docs actually ship, with code adapted from OpenAI's own examples.

Apr 29, 20269 min read

OpenAI Apps SDK: Building MCP UIs Inside ChatGPT

Apps SDK (now ChatGPT plugins) is MCP plus an optional web component rendered in ChatGPT. How the server, the UI resource, auth and publishing actually work, with code adapted from OpenAI's quickstart.

Apr 29, 202610 min read

Codex Security Preview: AppSec Agent for Real Repos

OpenAI's Codex Security agent reviews app code for vulns. Here is what it caught and missed on three real production repos.

Apr 29, 202610 min read

GPT-5.4 for Developers: The Production Guide

GPT-5.4 developer guide with OpenAI SDK code, computer use, the 272K-token pricing cliff, and when 5.4 still beats GPT-5.3 and GPT-5.5 in production.

Apr 29, 202612 min read

GPT-5.5-Codex in Production: What Actually Changes

GPT-5.5-Codex merges Codex and GPT-5 stacks. Here is what the unified model means for real coding agents - latency, costs, prompt rewrites.

Apr 29, 20269 min read

GPT-5.5 for Developers: A Production Field Guide

GPT-5.5 and 5.5 Pro for developers: pricing, which tier fits which workload, agentic gains from real evals, a regression to watch, and a migration playbook.

Apr 29, 202611 min read

OpenAI AgentKit in Production: An Honest Builder's Review

OpenAI AgentKit review from a real rebuild: what Agent Builder, Connector Registry, and ChatKit do, where the visual canvas wins, and when to drop back to code.

Apr 29, 202611 min read

OpenAI Privacy Filter: Production PII Redaction Guide

OpenAI Privacy Filter is an open-weight PII redactor. How to wire it into a local RAG ingestion pipeline and how it benchmarks against Presidio and regex.

Apr 29, 202610 min read

Assistants to Responses API: A Migration Field Guide

Migrate from the OpenAI Assistants API to the Responses API: a tested plan covering code, state, threads, tool-use parity, and an eval-gated cutover.

Apr 29, 202613 min read

Shipping OpenAI Symphony in Prod: A Real-World Guide

What it actually takes to wire OpenAI Symphony into a Linear-driven Codex workflow - auth, runs, sandboxes, costs, and the gotchas nobody warned me about.

Apr 29, 202612 min read

Anthropic vs OpenAI: Developer Experience Compared

Anthropic vs OpenAI for developers: how the two platforms compare on APIs, SDKs, documentation, pricing and the day-to-day experience of building with each.

Apr 3, 20268 min read

Astral Joins OpenAI: What It Means for Python Developers

Astral, the team behind Ruff and uv, is joining OpenAI. What it means for Python developers, AI tooling and why OpenAI is investing in developer infrastructure.

Mar 19, 20264 min read

OpenAI Codex: Terminal and Cloud AI Coding Agent

Codex works from the terminal, cloud tasks, IDEs, GitHub, Slack, and Linear. Here is how to use it and how it compares to Claude Code.

Mar 19, 20265 min read

OpenAI vs Anthropic in 2026 - Models, Tools, and Developer Experience

A developer's comparison of OpenAI and Anthropic ecosystems - models, coding tools, APIs, pricing, and which to choose for different use cases.

Mar 19, 202618 min read

OpenAI's GPT 5.4 in 10 Minutes

State-of-the-art computer use, steerable thinking you can redirect mid-response, and a million tokens of context. GPT 5.4 is OpenAI's most capable model yet.

Mar 6, 20268 min read

ChatGPT Atlas: OpenAI's Built-In Web Browser

ChatGPT Atlas is the OpenAI web browser with ChatGPT built in. How it works with your logged-in documents, its agent mode for site tasks and who can use it.

Oct 21, 20253 min read

OpenAI Dev Day 2025: Everything Announced

OpenAI is turning ChatGPT into a hub. The new Apps feature lets you access external services directly inside conversations.

Oct 6, 20254 min read

GPT-5 Codex: OpenAI's Agentic Coding Model

GPT-5 Codex is OpenAI's product-optimized coding model, trained on the full software lifecycle and built for long autonomous runs across every Codex surface.

Sep 16, 20257 min read

GPT-5: OpenAI's Most Capable Model

GPT-5 routes each query by complexity instead of making developers pick a reasoning mode. Its benchmarks, front-end coding gains and four API models explained.

Aug 8, 20257 min read

GPT-OSS: OpenAI's First Open Source Model

GPT-OSS is OpenAI's pair of open-weight 20B and 120B reasoning models under Apache 2.0. Hardware needs, benchmarks, hosting costs and how to run them locally.

Aug 6, 20256 min read

ChatGPT Agent: OpenAI's Operator Meets Deep Research

ChatGPT Agent combines Operator-style actions with deep research in one agent. What it can produce, how it works, its pricing and limits for developers.

Jul 17, 20257 min read

OpenAI Agents SDK for TypeScript: A Practical Guide

OpenAI Agents SDK for TypeScript, explained with code: agents, Zod tools, structured outputs, multi-agent handoffs, streaming and human approval steps.

Jun 7, 202510 min read

OpenAI Deep Research: The AI Agent That Does Your Homework

OpenAI Deep Research is a ChatGPT agent that turns a research question into a cited report in minutes. How it works, the model behind it, and its limits.

Feb 3, 20257 min read

ChatGPT Tasks: Scheduled AI Agents Inside ChatGPT

ChatGPT Tasks lets you schedule reminders and recurring jobs in plain language. See how it works, practical use cases, current limits and where it is heading.

Jan 14, 20258 min read

ChatGPT Desktop Now Reads Your VS Code, Terminal, and Xcode

ChatGPT desktop on macOS can now read VS Code, Xcode, Terminal and iTerm2. How to set it up, what the read-only beta does today and where it falls short.

Nov 14, 20248 min read

OpenAI Realtime Voice API: Getting Started Guide

The Realtime API uses WebSockets for two-way voice interaction with function calling and stateful conversations. Here is how to set it up and build on it.

Oct 4, 20248 min read

Related Tools

All tools →

OpenAI Codex

Agent

OpenAI's coding agent for terminal, cloud, IDE, GitHub, Slack, and Linear workflows. Reads repos, edits files, runs commands, and returns reviewable diffs.

AI Coding

OpenAI Agents SDK

Python and TypeScript framework for multi-agent workflows. Agent handoffs, tool use, guardrails, sessions, tracing. Provider-agnostic, supporting the OpenAI Responses and Chat Completions APIs plus 100+ other LLMs.

AI Frameworks

ChatGPT

OpenAI's chat app. As of October 2026 Free and Go run GPT-6 Luna; Plus ($20/mo) adds GPT-6.1 Sol and GPT-6 Astra. Agent mode, Codex, image generation, code interpreter.

AI Models

GPT-5

OpenAI's GPT-5 model, released August 2025. Unified fast and reasoning modes in one model. Superseded by the GPT-6 family in September 2026 and now marked deprecated in the API.

AI Models

Codex CLI

OpenAI's open-source (Apache-2.0) terminal coding agent, built in Rust. Included with ChatGPT Plus from $20/mo or usable with an API key. Defaults to GPT-6.1 Sol.

AI Coding

Agency Swarm

Multi-agent orchestration framework built on the OpenAI Agents SDK. Define agent roles, typed tools, and directional communication flows. Production-focused, open-source.

AI Frameworks

Keep exploring