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Claude Fable 5 API: Pricing and How to Get Access

What Claude Fable 5 costs, where it’s available, and how to start building with Anthropic’s most capable public model.

Jun 9, 2026Fable5Fable5

Claude Fable 5 brings Mythos-class capability to developers at a price that’s less than half of the Claude Mythos Preview. Here’s what it costs and how to start.

Pricing

| Tokens | Price | | --- | --- | | Input | $10 per million tokens | | Output | $50 per million tokens |

That’s a significant drop from the Mythos Preview pricing — making frontier-level reasoning practical for production workloads.

Where it’s available

  • Claude API — for developers building their own products.
  • Claude mobile apps — Anthropic’s most capable model, in your pocket.
  • GitHub Copilot — generally available for coding assistance.
  • Harvey and other partner products.

Getting started

  1. Create an account in the Claude Console.
  2. Generate an API key.
  3. Call the model id for Claude Fable 5 from the Anthropic SDK.

A note on safeguards

Fable 5 is the safeguarded public model. On a small set of high-risk topics it falls back to Claude Opus 4.8 — something to keep in mind when designing flows around sensitive domains.