{"version":"2.1.129","anchor":"opus-4-7-fast-mode-in-development","canonical_anchor":"opus-4-7-fast-mode-in-development","heading":"Opus 4.7 Fast Mode [In Development]","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.129\/e\/opus-4-7-fast-mode-in-development","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.129","markdown":"### Opus 4.7 Fast Mode [In Development]\n\n**What**\n\nClaude Code has infrastructure to switch Fast Mode labeling and model selection from Opus 4.6 to Opus 4.7.\n\n**Status**\n\nEnvironment-gated\n\n**Details**\n\n- The new gate is `CLAUDE_CODE_ENABLE_OPUS_4_7_FAST_MODE`.\n- When enabled, Fast Mode text can report `Opus 4.7`; otherwise it remains on `Opus 4.6`.\n- Because this is gated by an environment variable and existing docs elsewhere still mention Opus 4.6 Fast behavior, treat this as experimental rather than broadly available.\n\n**Evidence**\n\nEnvironment-gated model switch (search for `\"CLAUDE_CODE_ENABLE_OPUS_4_7_FAST_MODE\"` and `\"Opus 4.7\"`)"}