{"name":"claude-fable-5-2","slug":"claude-fable-5-2","family":"model","title":"Models","noun":"model","description":"Claude Code now knows claude-fable-5-2 and claude-mythos-5-2, accepts the short names `fable-5-2` and `mythos-5-2`, and lists Fable 5.2 as latest","description_source":"entry","described_by":{"version":"2.1.321","anchor":"fable-52-and-mythos-52-model-recognition-added"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.322","builds":0,"mined_builds":161,"first_cited":{"version":"2.1.321","released_at":"2026-11-09 19:02:47","spans":2}},"aliases":[],"entries":[{"version":"2.1.321","anchor":"fable-52-and-mythos-52-model-recognition-added","heading":"Claude Code now recognises the Fable 5.2 and Mythos 5.2 models","line":"Claude Code now knows claude-fable-5-2 and claude-mythos-5-2, accepts the short names `fable-5-2` and `mythos-5-2`, and lists Fable 5.2 as latest","released_at":"2026-11-09 19:02:47","reason":"named in this entry, found in this entry's text"},{"version":"2.1.321","anchor":"fast-mode-now-needs-an-explicit-opt-in-on-fable-52-mythos","heading":"Fast mode on Fable 5.2 and Mythos 5.2 now needs you to choose it","line":"Fast mode on `claude-fable-5-2` and `claude-mythos-5-2` only applies if you chose it this session or saved that choice in your config","released_at":"2026-11-09 19:02:47","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":"about-claude\/models\/choosing-a-model","title":"choosing-a-model","documented":false},{"source":"api","path":"about-claude\/models\/model-ids-and-versions","title":"model-ids-and-versions","documented":false},{"source":"api","path":"agents-and-tools\/agent-skills\/overview","title":"PDF Processing","documented":false},{"source":"api","path":"agents-and-tools\/mcp-connector","title":"mcp-connector","documented":false},{"source":"api","path":"agents-and-tools\/mcp-tunnels\/overview","title":"overview","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/advisor-tool","title":"advisor-tool","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/bash-tool","title":"bash-tool","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/browser-use-sdk","title":"browser-use-sdk","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/browser-use-tool","title":"browser-use-tool","documented":false}],"docs_total":12,"gates":[],"related":[{"name":"claude-fable-5","slug":"claude-fable-5","description":"Opus 5 is now the default Opus, with a 1M-context option in the model picker."},{"name":"claude-fable-5-1","slug":"claude-fable-5-1","description":"A claude-fable-5-1 model id is recognized and becomes the fable family default, with UI text updated to Fable 5.1."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/model\/claude-fable-5-2","family_url":"https:\/\/changelogs.core-directive.com\/reference\/model.json"}