Claude Mythos 5.1
by Anthropic · ID claude-mythos-5-1 · Released 2026-09 · Proprietary
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1M
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$10.00
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About Claude Mythos 5.1
The same model as Fable 5.1 without the production safeguards, released the same day and priced identically. Not generally available: access runs through restricted programmes for vetted cybersecurity and life-sciences organisations that need capabilities those safeguards normally constrain. Prices checked 1 September 2026.
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