ANTHROPIC

Fable 5 June 22 decision checklist for Pro, Max, Teams and API users: what to decide and test before the window closes, and when Opus 4.8 is the right call.

Why Claude Fable 5 refuses cybersecurity, bio and distillation queries, how it falls back to Opus 4.8, and what API developers must configure first.

Claude Fable 5 silently degrades answers on some ML development tasks with no refusal or notice. See which work is restricted and what developers should do.

Fable 5 posts an 80.3% SWE-Bench Pro score and costs 2x Opus 4.8 - here is the task-profile scoring guide that tells you when the premium pays off.

Migrating to Claude Fable 5 from Opus 4.8 or older models - every breaking change, what to delete from your code, and the prompt audit to run before switching.

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.

Claude Mythos 5 explained - how it differs from Fable 5, who gets unrestricted access through Project Glasswing, and what developers should do right now.

Claude Opus 4.8 for developers: better honesty, dynamic workflows and effort controls that make long-running agent work easier to review.

Anthropic's Stainless acquisition is a bet that agents need generated SDKs, CLIs, docs and MCP servers built from one source of truth.

Claude Code is turning into an orchestration layer for agent teams. Here is how subagents, MCP, hooks, and long context fit together in 2026.

Claude Design reads your repo to build a design system, generates layouts like pricing pages, and exports HTML/CSS to your coding agent. What developers get.

Claude Opus 4.7 developer guide: what changed, pricing, SDK usage, prompt caching, when to pick Opus vs Sonnet or Haiku, and migration notes from 4.6.

Anthropic's Opus model released April 2026, since succeeded by Opus 4.8 and Opus 5.5. Strong at coding, long-context analysis, and agentic work. 1M context, $5/$25 per million tokens.

Anthropic's smallest Claude 4.5 model, released October 2025 and succeeded by Haiku 5.5 in October 2026. Sonnet 4-level coding at one-third the cost. $1/$5 per million tokens.

Managed scheduling on Anthropic infrastructure with API and GitHub triggers.

Claude Code usage limits are mostly an ops problem. A playbook for Pro and Max teams: lock auth mode, bound subagents, add hooks and route work by difficulty.

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.

Anthropic's computer use feature lets Claude see your screen, move the cursor, click, and type. Here is how it works, when to use it, and how to set it up.

Anthropic's Claude Haiku 4.5 delivers Sonnet 4-level coding performance at one-third the cost and twice the speed. Here is what developers need to know.

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