Anthropic's official account @claudeai announced on X on July 24, 2026: "Opus 5 is available today on all paid plans and the Claude API, priced the same as Opus 4.8. It's the default model on Claude Max, and the strongest on Claude Pro. It's also offered in Fast mode, which runs around 2.5x the default speed."
What Was Announced
According to the announcement, Opus 5 is now available across all paid plans and the Claude API, priced the same as Opus 4.8. On Claude Max, Opus 5 becomes the default model, while on Claude Pro it is offered as the strongest available model. It is also offered in a Fast mode that runs at roughly 2.5 times the default speed.
What This Means for Users
Claude Max subscribers will now use Opus 5 by default without any additional setup, and Claude Pro subscribers gain access to a more capable model at the same price as before. For tasks where response speed matters, Fast mode offers a quicker option.
Not Covered in the Official Announcement
Specific performance differences between Opus 5 and Opus 4.8, as well as the precise scope or limitations of Fast mode, were not included in the official announcement. Please check Anthropic's official channels for the latest details.