{"version":"2.1.280","anchor":"new-models-are-unpinned-from-launch-time-forced-effort-by-de","canonical_anchor":"future-model-ids-opus-4-6-opus-4-7-opus-4-8-sonnet-4-6","heading":"Newly launched models default to full effort instead of a launch-time pin","tier":"internal","area":"Effort","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280\/e\/new-models-are-unpinned-from-launch-time-forced-effort-by-de","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280","markdown":"### Newly launched models default to full effort instead of a launch-time pin\n\nNew Opus and Fable models now run at full effort by default instead of being pinned to a launch-time effort level, and old pinning settings were removed.\n\n**What**\n\n- Claude Code used to force newly launched models (like a brand-new Opus or Fable release) to run at a reduced \"launch effort\" level for a period after release, controlled by settings such as `unpinOpus47LaunchEffort`, `unpinOpus48LaunchEffort`, and `unpinFable5LaunchEffort`.\n\n- A new mechanism now walks the list of newly-launched models (`claude-opus-4-7`, `claude-opus-4-8`, `claude-fable-5`, and whatever `ANTHROPIC_DEFAULT_FABLE_MODEL` resolves to) and keeps each pinned to the launch effort level unless the matching unpin setting is turned on.\n\n- For a genuinely first-ever install of this build (no `firstStartVersion` recorded yet), the whole pin list is skipped, so brand-new installs start unpinned.\n\n- The three unpin settings were removed from the default client config store, and the model-recency list used for feature gating now includes claude-opus-4-6, claude-opus-4-7, claude-opus-4-8, and claude-sonnet-4-6.\n\n**Why**\n\nThis keeps existing installs behaving the same (still pinned to a conservative effort level for brand-new models) while letting fresh installs and future models participate in feature gating and default effort without extra config.\n\n- Area: Effort\n- Names: `unpinOpus47LaunchEffort`, `unpinOpus48LaunchEffort`, `unpinFable5LaunchEffort`\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 3\/5"}