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ANTHROPIC

148 items

140 posts, 7 tools, 1 guide

Blog
Anthropic Claude Tag Turns Slack Into a Shared Agent Workspace

Claude Tag brings Claude into Slack for Team and Enterprise users. What shared agent identity, channel context and team-visible work mean for developers.

Blog
Claude Code's Extended Thinking Is a Summary - What That Means for You

A developer discovered that Claude Code's thinking output is summarized, not the raw reasoning. Here's what Anthropic's docs actually say - and why it matters.

Blog
Claude Code Permissions: settings.json Allow, Deny, Ask

Configure Claude Code permissions in settings.json: allow, deny, and ask rules, scope precedence, tool specifiers, and the headless flags you need for CI.

Blog
Claude Mythos and Fable 5 Banned: The Export Controls That Shut Down Two Frontier Models

Claude Fable 5 and Mythos 5 were suspended for all users by a US export control directive. What it said, why it hit everyone, and what changed for developers.

Blog
Claude Mythos vs Fable 5: What Is the Difference?

Claude Mythos 5 vs Fable 5 explained. They are the same underlying model with different access and safeguards, which is why both were suspended together.

Blog
Is Claude Fable 5 Down? Why It Is Unavailable (June 2026)

Is Claude Fable 5 down? It was suspended on June 12, 2026 by a US export directive, not an outage. What to use instead, and the update on its return.

Blog
The US Government Just Pulled Fable 5: What Happened

Fable 5 was pulled by a US export control directive, disabling it and Mythos 5 for every customer. What happened, what still works, and what to do next.

Blog
Why the US Government Pulled Fable 5: Four Theories

A narrow jailbreak that other models can match does not get a frontier model recalled. So what actually happened? The plausible explanations, ranked.

Blog
Claude Agents vs Skills: Which One Do You Actually Need?

Claude agents vs skills, untangled: agents are workers with their own context window, skills are instructions loaded on demand. Here is the decision table.

Blog
Claude Code Dynamic Workflows: The Complete Guide

Claude Code dynamic workflows turn orchestration into a JavaScript script that runs agents in the background. How scripts, schemas, budgets and resume work.

Blog
The Claude Tokenizer Change: What ~30% More Tokens Means for Your Bill

Anthropic's docs say the tokenizer introduced with Opus 4.7 can use up to 35% more tokens for the same text. Here is what that does to per-request cost, max_tokens, and cross-model comparisons.

Blog
Fable 5 with 1M Context: What Actually Works in Practice

Fable 5 1M context workflows that actually work: whole-repo reviews, log archaeology, multi-doc synthesis - plus the honest math on when RAG still wins.

Blog
Claude Effort Levels Explained: Fable 5, Opus 5.5, Haiku 5.5

Claude effort levels explained: what low, medium, high, xhigh and max change on Fable 5, Opus 5.5 and Haiku 5.5, each default, and what a level costs.

Blog
Handling Long-Running Fable 5 Requests: Timeouts, Streaming, and Background Patterns

Fable 5 long-running requests can run for minutes per turn and hours per run. Configure client timeouts, streaming keepalive, batch polling and background jobs.

Blog
Setting Up the Memory Tool with Fable 5: Persistent Agents That Learn

Fable 5 memory tool setup with handlers, security and context editing. Anthropic says file-based memory helped Fable 5 three times more than it helped Opus 4.8.

Blog
Fable 5 Orchestrator Playbook: Smart Model, Cheap Workers

A practical playbook for running Claude Fable 5 as the orchestrator over Sonnet and Haiku workers, with verified cost math on when the premium pays off.

Blog
Prompt Caching Economics on Fable 5: When the 5-Minute TTL Pays

Fable 5 prompt caching economics: cache-write vs cache-read pricing, 5-minute vs 1-hour TTL break-even math, and worked agent-loop examples.

Blog
Fable 5 Task Budgets: Capping Agent Spend Before It Happens

Fable 5 task budgets give Claude a token countdown for a whole agentic loop. How the beta works, what it does not enforce, and where effort and max_tokens fit.

Blog
How to Use Claude Fable 5: Every Access Path Explained

How to use Claude Fable 5 via claude.ai plans, the Claude API, Amazon Bedrock, Vertex AI and Microsoft Foundry, with model IDs, setup effort and prompt tips.

Blog
Is Claude Fable 5 Slow? Latency in Practice, and When It Matters

Claude Fable 5 latency measured: 109 seconds to first token at max effort vs 1.4s for Sonnet 4.6. When slow is fine, when it hurts, and how to route around it.

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