{"version":"2.1.311","anchor":"model-info-gains-servedwindow","canonical_anchor":"model-info-gains-servedwindow","heading":"Model context size now comes from a served value","tier":"internal","area":"Models","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.311\/e\/model-info-gains-servedwindow","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.311","markdown":"### Model context size now comes from a served value\n\nClaude Code now works out a model's long-context size from a value served with the model's details\n\n**Unclear.** It is not clear where the served value comes from or whether your context window size changes.\n\n**What**\n\nThe context window is how much text a model can take in at once. Claude Code keeps details about each model, and these now include a served window value. The long context size available without opting in is now worked out from that value. Before, it came from a lookup based on the model name alone.\n\n**Why**\n\nThis can change how large Claude Code thinks a model's context window is.\n\n- Area: Models\n- Tier: Under the hood\n- Useful: 3\/5\n- Signal: 3\/5\n- Scope: individual\n- Heads-up: no"}