{"id":"clm_21F51BB8C407","entity":"anthropic","predicate":"model_release","value":"Claude Opus 4.8","value_json":{"feed":"claude-platform-release-notes","item":"https://platform.claude.com/docs/en/release-notes/overview#2026-05-28","tags":{"v":2,"ai":true,"by":"claude-haiku-5-5","on":"2026-10-31","themes":["reasoning"],"model_tier":"frontier","release_kind":"model"},"check":{"on":"2026-10-31","url":"https://www.anthropic.com/news/claude-opus-4-8","pages":2,"quote":"We’re upgrading Claude Opus to a new version: Claude Opus 4.8. It builds on Opus 4.7 with improvements across benchmarks, and is a more effective collaborator. It’s available today for the same price.","outcome":"checked"},"evidence":"We’ve launched Claude Opus 4.8 ( ), our most capable model. Claude Opus 4.8 supports a 1M token context window by default on the Claude API, Amazon Bedrock, Google Cloud, and Microsoft Foundry, 128k max output tokens, and the same set of tools and platform features as Claude Opus 4.7. See the migrat","extracted_by":"claude-haiku-5-5","primary_source":true},"valid_from":"2026-05-28","valid_to":null,"published":"2026-05-28","recorded":"2026-10-29","confidence":0.7,"status":"valid","assertable":true,"superseded_by":null,"supersedes":[],"first_seen_at":"2026-10-29T20:16:25.427754+00:00","updated_at":"2026-10-31T03:52:09.939321+00:00","sources":[{"url":"https://platform.claude.com/docs/en/release-notes/overview#2026-05-28","tier":"primary","publisher":"Anthropic","published_at":"2026-05-28T00:00:00+00:00"},{"url":"https://www.anthropic.com/news/claude-opus-4-8","tier":"primary","publisher":"Anthropic","published_at":"2026-05-28T00:00:00+00:00"}],"evidence":{"by":"page-read","on":"2026-10-31","quote":"We’re upgrading Claude Opus to a new version: Claude Opus 4.8. It builds on Opus 4.7 with improvements across benchmarks, and is a more effective collaborator. It’s available today for the same price.","url":"https://www.anthropic.com/news/claude-opus-4-8","excerpt":"We’ve launched Claude Opus 4.8 ( ), our most capable model. Claude Opus 4.8 supports a 1M token context window by default on the Claude API, Amazon Bedrock, Google Cloud, and Microsoft Foundry, 128k max output tokens, and the same set of tools and platform features as Claude Opus 4.7. See the migrat"},"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.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date"}}}