SOURCE RECORD · obs_810c0a921a44…

Anthropic · Release notesSource update

Substantive changesRecordedObservation date 2026-09-23(day precision)Revision r2

This record is outside your history allowance. Register for 30 days or choose Plus for all available history.

Summary

Newly added Claude Opus 5.5 announcement, which explains its 1M context window, thinking is not disableable, and Fast mode is available; also newly added inline-tools beta function and thinking-binding-controls update.

LLM generation

LLM The summary is machine-generated; please refer to the original text for important information.

Permanent link

https://daily.maas.click/item/obs_810c0a921a4498ecc31bd222c687227c2d27eea1ee727afbecb3731c78d7d326/

Source page

https://docs.anthropic.com/en/release-notes/api ↗

This link points to the source's official page (not content on this site).