Anthropic Claude API — Claude Fable 5.1 — Event History

Initial canonical baseline for Anthropic Claude Fable 5.1 on the native Claude API. Official pricing is $10/M input, $50/M output, $0.25/M cache reads, with 50% Batch API discounts; 1M-token context and 128K max output. This is a NEW event, not a price-change event.