{"version":"2.1.293","anchor":"haiku-45-fallback-helper-for-first-party","canonical_anchor":"haiku-45-fallback-helper-for-first-party","heading":"Claude Haiku 4.5 can be picked as the small model on Anthropic's API","tier":"notice","area":"Models","scope":"individual","heads_up":true,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.293\/e\/haiku-45-fallback-helper-for-first-party","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.293","markdown":"### Claude Haiku 4.5 can be picked as the small model on Anthropic's API\n\nOn Anthropic's own API, Claude Code may use Claude Haiku 4.5 instead of the default small model when a condition is met\n\n**Unclear.** It is not clear what condition decides when Claude Haiku 4.5 is used.\n\n**What**\n\nClaude Code uses a small, fast model for some side tasks. When you connect directly to Anthropic's API, it now chooses Claude Haiku 4.5 for that role if a certain condition holds and the model is not excluded. Otherwise it uses the usual default small model.\n\n**Why**\n\nThis could change which small model handles side tasks.\n\n- Area: Models\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 3\/5\n- Scope: individual\n- Heads-up: yes"}