{"version":"2.1.282","anchor":"bundled-model-catalog-opus-5-moved-to-the-overflow-sectio","canonical_anchor":"opus-55-model-description-changed","heading":"Model list: Opus 5 moves to overflow, Opus 5.5 relabelled, and model names follow aliases","tier":"notice","area":"Models","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.282\/e\/bundled-model-catalog-opus-5-moved-to-the-overflow-sectio","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.282","markdown":"### Model list: Opus 5 moves to overflow, Opus 5.5 relabelled, and model names follow aliases\n\nOpus 5 leaves the main model list and quick select, Opus 5.5 gets a new description, and picker labels and examples follow the current aliases\n\n**Unclear.** Which screen reads this built-in list, and whether a copy from the server overrides it, is not settled.\n\n**What**\n\nThe model list built into Claude Code, and the places that show model names, changed in several ways:\n\n- `claude-opus-5-5` (\"Opus 5.5\") is now described as \"Most capable for ambitious work\" instead of \"For complex tasks\".\n\n- `claude-opus-5` moves from `section: \"main\"` to `section: \"overflow\"`, loses its \"For complex tasks\" description, and loses `quick_select`. This is the entry with the Fast mode toggle, 1M input tokens and 128000 output tokens. `claude-opus-5-5` and `claude-sonnet-5` keep `quick_select`.\n\n- The Haiku 4.5 entry, `claude-haiku-4-5-20251001`, now sits ahead of Opus 5 in the main section.\n\n- The \"Opus\" and \"Opus (1M context)\" entries in the model picker no longer hard-code \"Opus 5.5\" or `claude-opus-5-5`. They show the id and display name of whatever the `opus` alias currently points to. The checks for Sonnet and Opus also compare against the aliases rather than the literal `claude-sonnet-5` and `claude-opus-5-5` ids.\n\n- The example in the Schedule (cloud routines) skill now fills `\"model\"` with whatever the `sonnet` alias resolves to, instead of `claude-sonnet-5`.\n\n**Why**\n\nOpus 5 may no longer appear among the quick picks in \/model and may sit in a secondary group. Picker labels and routines built from the example track the current aliases, so they change when an alias moves to a newer model.\n\n- Area: Models\n- Names: `claude-opus-5`\n- Tier: You'll notice\n- Useful: 4\/5\n- Signal: 5\/5"}