Fable 5
Anthropic's first Mythos-class model as a product: $10 per million input tokens, $50 output, 1M context. The premium tier for long-horizon work.
Fable 5 is the product face of Anthropic's Mythos program: the first Mythos-class model anyone can buy. It went on sale June 9, 2026, and this page tracks the commercial side: what it costs, what the price includes, and where it runs. For the full technical picture, start with the Fable 5 explainer.
Pricing
- $10 per million input tokens, $50 per million output tokens on the Claude API. Exactly double Opus 4.8.
- Included in Pro, Max, Team, and seat-based Enterprise plans at no extra cost through June 22, 2026.
- A request the safety layer refuses before any output costs nothing, and fallback credit covers the prompt-cache cost when a request reroutes to another model.
The fine print, including the decision tree for when the premium pays off, lives in our pricing and access guide.
What the price includes
- 1M-token context window by default, with up to 128k output tokens per request.
- Adaptive thinking, always on, steered through the effort parameter.
- The launch feature set: memory tool, compaction, context editing, task budgets (beta), and vision.
Where it runs
Generally available on the Claude API, the Claude Platform on AWS, Amazon Bedrock, Vertex AI, and Microsoft Foundry, with a gradual GitHub Copilot rollout underway. Integration details, model IDs, and migration notes are in the developer guide; the authoritative spec sheet is Anthropic's product page plus the platform documentation.