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Claude Code Max plan users now default to fast mode on Claude Opus 4.8.
The read
Default mode changed for Max plan users, so Opus use in Claude Code starts on speed first.
The frame
This sits in Claude Code defaults, so builders on Max should check mode behavior before assuming Opus runs unchanged.
Primary source
Anthropic →Keep reading
See what Nova3 builds →Related updates
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- Jul 25, 2026Anthropic removed modelcard language for Claude Fable 5 and Claude Mythos 5.
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