Opus 4.8's Fast mode, announced by @claudeai on 2026-05-28, delivers the identical model at about 2.5x latency improvement while cutting cost to one-third of prior pricing. Users can toggle it in Claude Code with /fast; API users must request access through an account manager or join the waitlist at claude.com/fast-mode.
Opus 4.8 now has a Fast mode that runs the same underlying model at roughly 2.5x the speed and is priced three times cheaper than before.
Fast mode is available for Opus 4.8. It's the same model at roughly 2.5x the speed, and we've made it three times cheaper than before.
Turn it on with /fast in Claude Code. On the API, contact your account manager to request access or join the waitlist: claude.com/fast-mode