AI article
Opus 5.5 Fast Mode Leaves Preview: 2x the Price, and a Speed Switch Misses the Cache
Community description: Since October 15, Opus 5.5 fast mode needs no beta header or access request. $8/$40 per MTok, up to 2.5x output speed, and its own cache and rate limit.
Dev.to | Oct 15, 2026 | Gabriel Anhaia
Automated excerpt
Fast mode for Claude Opus used to sit behind a door. Fast mode "is out of research preview for Claude Opus 5. 5, and you no longer need to request access. " Every usage tier now has a default fast mode rate limit for Opus 5. 5. Fast mode speeds up output tokens per second.
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