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Sweep 03 Nov 2026 · 22:27Z Build v2.1.318 536 read Stable v2.1.311 Latest v2.1.318 Next v2.1.318 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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extended-thinking changedbuild-with-claude/extended-thinking

Nearest release: v2.1.318, published 4 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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First seen 14 Aug 2026 this site's first read of the page
Recorded edits22to this page, all time

The whole hunk

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4545 ```bash cURL
4646 curl https://api.anthropic.com/v1/messages \
4747 -H "x-api-key: $ANTHROPIC_API_KEY" \
48 -H "anthropic-version: 2023-06-01" \
48 -H "anthropic-version: 2026-10-21" \
4949 -H "content-type: application/json" \
5050 -d '{
5151 "model": "claude-sonnet-4-6",
from line 317
317317 
318318How platforms treat the beta header differs. The Claude API, [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws), and [Claude Models on Google Cloud (Anthropic managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/anthropic-managed) accept `interleaved-thinking-2025-05-14` on any model and ignore it where unsupported. Acceptance is not the same as effect: on models that reject `type: "enabled"` (4.7 and later) or lack manual-mode interleaving (Claude Opus 4.6), the header has no manual-mode effect; adaptive thinking interleaves automatically there.
319319 
320Partner-operated platforms, [Amazon Bedrock](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock) and [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/google-managed), likewise accept the header on any model without returning an error, and ignore it on models that don’t support interleaved thinking.
320Partner-operated platforms, [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/google-managed) and [Amazon Bedrock](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock), likewise accept the header on any model without returning an error, and ignore it on models that don’t support interleaved thinking.
321321 
322322## Turn structure in manual mode
323323 
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