{"id":"clm_5045E2C6B4ED","entity":"claude-sonnet-4","predicate":"context_window","value":"1M token","value_json":{"feed":"claude-platform-release-notes","item":"https://platform.claude.com/docs/en/release-notes/overview#2025-08-12","tags":{"v":2,"ai":true,"by":"claude-haiku-5-5","on":"2026-11-13","themes":["developer_platform","reasoning"]},"check":{"on":"2026-11-14","url":"https://platform.claude.com/docs/en/release-notes/overview#2025-08-12","pages":2,"quote":"August 12, 2025 We’ve launched beta support for a 1M token context window in Claude Sonnet 4 on the Claude API and Amazon Bedrock.","outcome":"checked"},"ended":{"on":"2026-11-14","url":"https://platform.claude.com/docs/en/release-notes/overview","note":"The 1M-token context window for Claude Sonnet 4 was a beta (from 2025-08-12) that was retired","quote":"We’ve retired the 1M token context window beta (`context-1m-2025-08-07`) for Claude Sonnet 4.5 and Claude Sonnet 4.","precision":11},"evidence":"We’ve launched beta support for a 1M token context window in Claude Sonnet 4 on the Claude API and Amazon Bedrock.","extracted_by":"claude-haiku-5-5","primary_source":true},"valid_from":"2025-08-12","valid_to":"2026-04-30","published":"2025-08-12","recorded":"2026-11-13","citation":{"plain":"AsOf. \"Claude Sonnet 4 context window: 1M token\", as of 2025-08-12 (until 2026-04-30). Claim clm_5045E2C6B4ED, https://asof.is/claim/clm_5045E2C6B4ED, accessed 2026-11-14. Source: https://platform.claude.com/docs/en/release-notes/overview#2025-08-12.","url":"https://asof.is/claim/clm_5045E2C6B4ED","accessed":"2026-11-14"},"confidence":0.7,"status":"superseded","assertable":true,"superseded_by":null,"supersedes":[],"first_seen_at":"2026-11-13T21:20:19.122517+00:00","updated_at":"2026-11-14T09:42:18.290275+00:00","sources":[{"url":"https://platform.claude.com/docs/en/release-notes/overview#2025-08-12","tier":"primary","publisher":"Anthropic","published_at":"2025-08-12T00:00:00+00:00"},{"url":"https://platform.claude.com/docs/en/release-notes/overview","tier":"primary","publisher":"Anthropic (Claude Platform release notes)","published_at":null}],"evidence":{"by":"page-read","on":"2026-11-14","quote":"August 12, 2025 We’ve launched beta support for a 1M token context window in Claude Sonnet 4 on the Claude API and Amazon Bedrock.","url":"https://platform.claude.com/docs/en/release-notes/overview#2025-08-12","excerpt":"We’ve launched beta support for a 1M token context window in Claude Sonnet 4 on the Claude API and Amazon Bedrock."},"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day its period closed). published: the earliest day a source on the record published it (a filing's filing date, a post's date; null when no source carries one). recorded: the day AsOf first held it. A figure can take effect weeks before it is published.","citation":"citation: how to cite the row (plain: one sentence with the value, its as-of date, the claim id and URL, the day answered and the primary source; url: the claim page; accessed: the day answered). APA and BibTeX forms are on the claim page.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date, as read by an AI model"}}}