Claude
Claude Fast Mode | How to Use 2.5x Speed, Pricing & Subscription Details
A guide to Claude's Fast Mode for users who want faster output — boosting generation speed up to 2.5x. Covers supported models (Opus 4.8/4.7/4.6), how to use /fast in Claude Code and speed: fast in the API, pricing for Opus 4.8 at $10 input / $50 output per million tokens, the important note that even subscribers are billed directly to usage credits, and how OTPS (not TTFT) is what actually speeds up.