Mythos 5.2 API Pricing

These are the tracked rates, not a live quote. Hosted-provider choice, region, long-context tiers, caching, batch discounts, and temporary promotions can change the actual bill. Open-weight availability does not mean hosted inference is free. Workload examples assume the listed standard input and output rates, with no cache hits or discounts.

Anthropic pricing catalog — check current offerings and rate tiers. This catalog may not list historical models or third-party hosted endpoints.

Publisher-reported pricing notes

• Mythos 5.2 shares Fable 5.2’s underlying model, context window, and standard token pricing.

Official release and model references

These references document the model and its release; not every reference is a pricing table. Confirm the applicable endpoint and billing tier with your inference provider before purchase.

• www.anthropic.com/claude-fable-and-mythos-5-2
• platform.claude.com/docs/en/models/fable-5-2/whats-new-fable-5-2
• platform.claude.com/docs/en/build-with-claude/context-windows

Computed straight from the list prices above — token counts are illustrative workload sizes, not measurements of Mythos 5.2.

In AI IQ's scoring, Mythos 5.2's list price is adjusted by a token-usage multiplier of 1.499, giving an effective cost of $71.96 per 1M input + output tokens. That places it #156 of 160 models on the effective-cost ranking (lower is cheaper). Some models spend far more tokens than others on the same task, so effective cost compares what a unit of work really costs. Method details are on the methodology page; see all models on the cost charts and the falling cost of intelligence over time.

Models with a lower effective cost that score within a few IQ points of Mythos 5.2, or better.