{"version":"2.1.299","anchor":"anthropic-betas-skips-a-beta-that-is-now-generally-available","canonical_anchor":"anthropic-betas-skips-a-beta-that-is-now-generally-available","heading":"ANTHROPIC_BETAS no longer sends a beta that is now generally available","tier":"notice","area":"API Requests","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.299\/e\/anthropic-betas-skips-a-beta-that-is-now-generally-available","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.299","markdown":"### ANTHROPIC_BETAS no longer sends a beta that is now generally available\n\nA beta listed in `ANTHROPIC_BETAS` that is now generally available is dropped from requests, and a debug message says so\n\n**What**\n\n`ANTHROPIC_BETAS` lets you add your own `anthropic-beta` header values to API requests. If it lists a beta that is now generally available, Claude Code no longer sends it. It writes a debug message instead, saying that the beta is generally available and the header is not sent.\n\n**Why**\n\nA beta you set by hand is now dropped once it is generally available. If a request behaves differently, check the debug log for that message.\n\n- Area: API Requests\n- Names: `ANTHROPIC_BETAS`\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}