{"version":"2.1.221","anchor":"fast-mode-no-longer-offered-on-opus-4-7","canonical_anchor":"fast-mode-no-longer-offered-on-opus-4-7","heading":"Fast mode no longer offered on Opus 4.7","tier":"notice","area":"Models","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.221\/e\/fast-mode-no-longer-offered-on-opus-4-7","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.221","markdown":"### Fast mode no longer offered on Opus 4.7\n\nFast mode is no longer offered on Opus 4.7, only on newer Opus models.\n\n**What**\n\nThe `fast_mode` capability was dropped from the baked-in catalog entry for claude-opus-4-7, and the eligibility check no longer name-matches that model.\n\n**Details**\n\n- Name matching is now limited to `opus-4-8` and `opus-5`, plus an explicit capability in the catalog.\n- Net effect in this build: fast mode is not available on Opus 4.7.\n\n**Evidence**\n\n`return n.includes(\"opus-4-8\") || n.includes(\"opus-5\");`\n\n- Area: Models\n- Names: `fast_mode`\n- Tier: You'll notice\n- Useful: 4\/5\n- Signal: 0\/5"}