{"name":"claude-3-opus","slug":"claude-3-opus","family":"model","title":"Models","noun":"model","description":"Claude Code now keeps a list of the older Claude 3 models and a check for whether the current model is outside it","description_source":"entry","described_by":{"version":"2.1.288","anchor":"legacy-claude-3-models-list-added"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.309","builds":0,"mined_builds":150,"first_cited":null},"aliases":[],"entries":[{"version":"2.1.288","anchor":"legacy-claude-3-models-list-added","heading":"Claude Code now groups the older Claude 3 models together","line":"Claude Code now keeps a list of the older Claude 3 models and a check for whether the current model is outside it","released_at":"2026-10-02 18:30:40","reason":"found in this entry's text"},{"version":"2.1.126","anchor":"read-tool-no-longer-injects-a-model-specific-malware-analysi","heading":"Read-tool no longer injects a model-specific malware-analysis system reminder","line":null,"released_at":"2026-04-30 20:30:34","reason":"found in this entry's text"}],"entries_total":2,"docs":[{"source":"api","path":"about-claude\/model-deprecations","title":"model-deprecations","documented":false},{"source":"api","path":"release-notes\/overview","title":"overview","documented":false}],"docs_total":2,"gates":[],"related":[{"name":"claude-3-5-haiku","slug":"claude-3-5-haiku","description":"Haiku 3.5 in Claude Code's model table (display name `Haiku 3.5`, family `haiku`). It maps to `claude-3-5-haiku-20241022` on the first-party API, `us.anthropic.claude-3-5-haiku-20241022-v1:0` on Bedrock and `claude-3-5-haiku@20241022` on Vertex, takes its Vertex region from `VERTEX_REGION_CLAUDE_3_5_HAIKU`, and has a maximum output of `8192` tokens."},{"name":"claude-3-5-sonnet","slug":"claude-3-5-sonnet","description":"Switching to any Sonnet model name ending in [1m] now checks for 1M-context access, except four older Sonnet models"},{"name":"claude-3-7-sonnet","slug":"claude-3-7-sonnet","description":"Switching to any Sonnet model name ending in [1m] now checks for 1M-context access, except four older Sonnet models"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/model\/claude-3-opus","family_url":"https:\/\/changelogs.core-directive.com\/reference\/model.json"}