Modelpeers

Claude Opus 4.6

Model at Anthropic

Breaking change

Fast mode removed for Claude Opus 4.6

Requests to claude-opus-4-6 with speed fast now run at standard speed and standard rates instead of returning an error.

Who is affected:
Apps using fast mode on Claude Opus 4.6.
What to do:
Move fast mode traffic to Claude Opus 4.8.

Source

"We've removed fast mode for Claude Opus 4.6."

Claude Platform release notes (API)

Published

Open the sourceplatform.claude.com

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