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Sweep 09 Oct 2026 · 17:27Z Build v2.1.296 517 read Stable v2.1.287 Latest v2.1.296 Next v2.1.296 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 28 Sep 2026
One change · api

Message Batches API changedbuild-with-claude/batch-processing

Nearest release: v2.1.284, published an hour 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.

Recorded here
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First seen 14 Aug 2026 this site's first read of the page
Recorded edits15to this page, all time

The whole hunk

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9595| Claude Opus 4.5 | $2.50 / MTok | $12.50 / MTok |
9696| Claude Opus 4.1 ([retired, except on Bedrock and Google Cloud](https://platform.claude.com/docs/en/about-claude/model-deprecations)) | $7.50 / MTok | $37.50 / MTok |
9797| Claude Opus 4 ([retired, except on Google Cloud](https://platform.claude.com/docs/en/about-claude/model-deprecations)) | $7.50 / MTok | $37.50 / MTok |
98| Claude Sonnet 5.5 | $1 / MTok | $5 / MTok |
9899| Claude Sonnet 5 | $1 / MTok | $5 / MTok |
99100| Claude Sonnet 4.6 | $1.50 / MTok | $7.50 / MTok |
100101| Claude Sonnet 4.5 | $1.50 / MTok | $7.50 / MTok |
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15701571### Extended output (beta)
15711572 
1572The `output-300k-2026-03-24` beta header raises the `max_tokens` cap to 300,000 for batch requests using Claude Opus 5.5, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5, or Claude Sonnet 4.6. Include the header to generate outputs far longer than the standard 128k `max_tokens` limit in a single turn.
1573The `output-300k-2026-03-24` beta header raises the `max_tokens` cap to 300,000 for batch requests using Claude Opus 5.5, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5.5, Claude Sonnet 5, or Claude Sonnet 4.6. Include the header to generate outputs far longer than the standard 128k `max_tokens` limit in a single turn.
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15741575<Note>
15751576 Extended output is available on the Message Batches API only, not the synchronous Messages API. It is supported on the Claude API and Claude Platform on AWS, and is not currently available on Amazon Bedrock, Google Cloud, or Microsoft Foundry.
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