{"version":"2.1.295","anchor":"model-catalog-refreshed-haiku-45-gets-extended-thinking-en","canonical_anchor":"model-catalog-refreshed-haiku-45-gets-extended-thinking-en","heading":"Built-in model list updated, adding Haiku 4.5 with extended thinking","tier":"notice","area":"Models","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.295\/e\/model-catalog-refreshed-haiku-45-gets-extended-thinking-en","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.295","markdown":"### Built-in model list updated, adding Haiku 4.5 with extended thinking\n\nThe built-in model list moved to a newer version and one list in it now includes Haiku 4.5 set to extended thinking\n\n**Unclear.** Which model picker or screen uses the list the new Haiku 4.5 entry was added to is not known.\n\n**What**\n\nThe list of models Claude Code ships with has moved from version 1760 to 1840, and the date it is good until has been pushed later. In one of its selection lists it now has an entry for `claude-haiku-4-5-20251001` with its thinking mode set to `extended`. Thinking mode decides how much the model reasons before answering. That list did not have this entry before.\n\n**Why**\n\nWherever this list is used, Haiku 4.5 is offered with extended thinking.\n\n- Area: Models\n- Names: `claude-haiku-4-5-20251001`\n- Tier: You'll notice\n- Useful: 3\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}