Claude Fable 5
Anthropic's Mythos-class flagship, a tier above Opus, built for autonomous knowledge work and coding with reasoning support and a 1M-token context window.
Pricing
Input$10 / 1M checked Jul 19, 2026
Cached input$1 / 1M
Output$50 / 1M checked Jul 19, 2026
Batch pricing $5 in / $25 out. Full 1M context at standard rates. Uses Anthropic's newer tokenizer, which produces roughly 30% more tokens for the same text than Claude 4.6 and earlier.
Cost bandPremium
Free tierNo free API tier.
Limits
Context window1M checked Jul 19, 2026
DeploymentClaude Platform, Bedrock, Vertex AI, Foundry
OpenAI-compatible APINo
ModalitiesText, Image input, PDF input
Where it fits
Best forLong-horizon autonomous agents, the hardest coding and reasoning tasks, work where quality dominates cost.
Business fitThe capability ceiling at twice Opus pricing; batch halves it when latency is flexible.
Capabilities
Extended thinkingFunction callingStructured outputsMCP
Change history
- Jun 9, 2026New modelClaude Fable 5 added to the index $10 in / $50 out per 1M, 1M context. Mythos-class tier above Opus. Anthropic pricing
Data
Last checkedJul 19, 2026
Cross-checked againstopenrouter.ai/anthropic/claude-fable-5
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