{"name":"claude-haiku-5-5","slug":"claude-haiku-5-5","family":"model","title":"Models","noun":"model","description":"Claude Code now recognises `claude-haiku-5-5`, with a 1M-token context window, its own pricing and a fallback to `claude-haiku-4-5`","description_source":"entry","described_by":{"version":"2.1.293","anchor":"claude-haiku-5-5-model-family-recognised"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.295","builds":0,"mined_builds":138,"first_cited":{"version":"2.1.293","released_at":"2026-10-07 17:18:04","spans":6}},"aliases":[],"entries":[{"version":"2.1.295","anchor":"claude-haiku-5-5-added-to-a-model-list-with-medium-default-e","heading":"Haiku 5.5 gets a medium-effort thinking default in a model list","line":"A model list now includes `claude-haiku-5-5` with thinking set to medium effort, and the model appears in more places than before","released_at":"2026-10-08 18:22:58","reason":"found in this entry's text, named in this entry"},{"version":"2.1.293","anchor":"claude-haiku-5-5-model-family-recognised","heading":"Claude Code now knows about a Haiku 5.5 model","line":"Claude Code now recognises `claude-haiku-5-5`, with a 1M-token context window, its own pricing and a fallback to `claude-haiku-4-5`","released_at":"2026-10-07 17:18:04","reason":"named in this entry, found in this entry's text"},{"version":"2.1.293","anchor":"haiku-alias-now-defaults-to-claude-haiku-5-5-with-third-par","heading":"The haiku model name now means Haiku 5.5 on the Anthropic API","line":"The `haiku` alias now picks `claude-haiku-5-5` on Anthropic's own API, while Bedrock, Vertex and other providers stay on `claude-haiku-4-5`","released_at":"2026-10-07 17:18:04","reason":"named in this entry, found in this entry's text"},{"version":"2.1.293","anchor":"haiku-alias-moves-to-claude-haiku-55","heading":"The Haiku model name now points to Claude Haiku 5.5","line":"Claude Code now names Haiku as Claude Haiku 5.5 (`claude-haiku-5-5`) instead of Haiku 4.5, and prices it with its own rate","released_at":"2026-10-07 17:18:04","reason":"named in this entry, found in this entry's text"},{"version":"2.1.293","anchor":"claude-haiku-55-model-added-with-vertex-region-override","heading":"Claude Code recognises Claude Haiku 5.5","line":"Claude Code now knows the claude-haiku-5-5 model, its short name haiku-5-5, and a Vertex region variable for it","released_at":"2026-10-07 17:18:04","reason":"named in this entry, found in this entry's text"}],"entries_total":5,"docs":[{"source":"api","path":"about-claude\/model-deprecations","title":"model-deprecations","documented":false},{"source":"api","path":"about-claude\/use-case-guides\/legal-summarization","title":"Create the full URL from the GitHub repository","documented":false},{"source":"api","path":"about-claude\/use-case-guides\/ticket-routing","title":"Create an instance of the Claude API client","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\/browser-use-tool","title":"browser-use-tool","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/code-execution-tool","title":"code-execution-tool","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/computer-use-tool","title":"computer-use-tool","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/programmatic-tool-calling","title":"Process results programmatically","documented":false},{"source":"api","path":"agents-and-tools\/tool-use\/tool-search-tool","title":"tool-search-tool","documented":false},{"source":"api","path":"api\/beta","title":"Beta","documented":false}],"docs_total":12,"gates":[],"related":[{"name":"claude-haiku-4-5","slug":"claude-haiku-4-5","description":"The compiled-in seed catalog used before the first fetch lists claude-opus-5, claude-sonnet-5 and claude-haiku-4-5."},{"name":"claude-haiku-4-5-20251001","slug":"claude-haiku-4-5-20251001","description":"In the built-in model list, Opus 5 moves to the overflow section and loses its quick-select flag and description"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/model\/claude-haiku-5-5","family_url":"https:\/\/changelogs.core-directive.com\/reference\/model.json"}