Our teams have been building with a 2.5x-faster version of Claude Opus 4.6.
We’re now making it available as an early experiment via Claude Code and our API.
— Claude (@claudeai) February 7, 2026
For «work like rapid iteration or live debugging» Anthropic is letting users go fast, by toggling «/fast» on their console.
The feature is available in a «limited research preview» in the API for paid users with «extra usage» enabled, and there is a waiting list to get on it.
It’s the same model with the same capabilities and there is no change other than the speed — and cost.
The price for using fast mode is $30 for input and $150 in output for a million tokens, but there is a 50% discount until February 16.
Read more: Details on Claude, launch post.