Tag: Claude Fable 5
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Claude Fable 5: New Tier Above Opus, Safety as API Surface
What changed with Claude Fable 5 compared to Opus? A new tier above the older model at twice the price, and safety that now lives in the API itself. Anthropic shipped it on June 9, 2026, alongside a sibling model, Claude Mythos 5. What Claude Fable 5 and Claude Mythos 5 are Claude Fable 5…