Claude Fable 5.2 is out at $8/$40 per million tokens, and its release notes include real breaking changes for API builders.
What to check before you switch, plus the Claude Code security fixes and OpenAI's Control Room 👇 https://t.co/MQKfOOIKfn
Claude Code 2.1.321 fixed MCP OAuth requests that could send refresh tokens to another host on redirect.
How to update, sandbox and audit MCP sign-ins, from Anthropic's docs.
Full breakdown and checklist below. 👇 https://t.co/AhlntruKRQ
Anthropic's own advice on Fable 5.2: start most coding work on Opus 5.5 and move up only when the task needs it. Source: Anthropic announcement, Nov 9.
1/11
Anthropic shipped Claude Fable 5.2 on Monday, around 21:00 Helsinki time. It's generally available, it's 20% cheaper than 5.1, and Anthropic's own advice is that most coding work should still start on Opus 5.5.
What actually changes for builders, with sources:
1/11
Anthropic shipped Claude Fable 5.2 on Monday, around 21:00 Helsinki time. It's generally available, it's 20% cheaper than 5.1, and Anthropic's own advice is that most coding work should still start on Opus 5.5.
What actually changes for builders, with sources: