Anthropic › Claude Mythos 5.1 › Pricing
Claude Mythos 5.1 pricing
API list price by Anthropic · checked Oct 23, 2026
$10 / $50per 1M tokens in / out
$0.25cache read · −97%
Price sheetper 1M tokens
| Input | $10 | list |
| Output | $50 | |
| Cache read | $0.25 | −97% vs input |
| Cache write | $12.50 | +25% vs input |
| Context · max output | 1M · 128K | tokens |
In Anthropic's line-upper 1M in / out
| Claude Haiku 5.5 | $0.10 / $0.50 | −99% |
| Claude Sonnet 5.5 | $2 / $10 | −80% |
| Claude Opus 5.5 | $4 / $20 | −60% |
| Claude Fable 5.1 | $10 / $50 | 0% |
| Claude Mythos 5 | $10 / $50 | 0% |
| Claude Mythos 5.1 | $10 / $50 | this model |
Pricing questions
How much does Claude Mythos 5.1 cost?›
$10 per 1M input tokens and $50 per 1M output tokens. Cached input is $0.25.
Is Claude Mythos 5.1 free to use?›
There is no free API tier.
How much does prompt caching save?›
Cache reads cost $0.25 per 1M, 97% below the input price. Writing to the cache costs $12.50 per 1M.