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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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One change · api

API usage primer for Claude changedclaude_api_primer

Nearest release: v2.1.293, 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 edits19to this page, all time

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1616Previous Opus model: Claude Opus 5: claude-opus-5
1717Smart model: Claude Sonnet 5.5: claude-sonnet-5-5
1818Previous Sonnet model: Claude Sonnet 5: claude-sonnet-5
19For fast, cost-effective tasks: Claude Haiku 4.5: claude-haiku-4-5-20251001
19For fast, cost-effective tasks: Claude Haiku 5.5: claude-haiku-5-5
20Previous Haiku model: Claude Haiku 4.5: claude-haiku-4-5-20251001
2021```
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2223## Calling the API
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246247 
247248* Claude Opus 5.5 (`claude-opus-5-5`, adaptive thinking only, always on)
248249* Claude Sonnet 5.5 (`claude-sonnet-5-5`, adaptive thinking only, on by default)
250* Claude Haiku 5.5 (`claude-haiku-5-5`, adaptive thinking only, on by default)
249251* Claude Opus 5 (claude-opus-5, adaptive thinking only, on by default)
250252* Claude Sonnet 5 (`claude-sonnet-5`, adaptive thinking only, on by default)
251253* Claude Opus 4.8 (claude-opus-4-8, adaptive thinking only)
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