Model pricing
Claude Mythos 5 pricing — cost per million tokens
Claude Mythos 5 costs $10.00 per million input tokens and $50.00 per million output tokens (USD). Anthropic offers it only to approved Project Glasswing customers. It also uses the newer tokenizer, which emits ~30% more tokens for the same text.
| Token rate | USD / 1M tokens |
|---|---|
| Effortqualitative reasoning depth | High |
| Inputper 1M tokens | $10.00 |
| Output | $50.00 |
| Cache write · 5-minute1.25× input | $12.50 |
| Cache write · 1-hour2× input | $20.00 |
| Cache read0.1× input | $1.00 |
Claude Code computes your real per-token cost from local session logs at these rates — no estimate, no upload.
Cache & context economics
Claude Mythos 5 adds cache reads at $1.00 / 1M — about a tenth of input, cache writes at $12.50 (5-minute) or $20.00 (1-hour) / 1M.
Common questions
- How much does Claude Mythos 5 cost per million tokens?
- $10.00 input and $50.00 output per million tokens (USD list price).
- Is Claude Mythos 5 generally available?
- No — Anthropic offers it only to approved Project Glasswing customers.
- What is the cache-read price for Claude Mythos 5?
- $1.00 per million cached-read tokens — about a tenth of the input rate.
- How is cache writing priced for Claude Mythos 5?
- A 5-minute cache write is $12.50 and a 1-hour write is $20.00 per million tokens — the split most trackers miss.
Track your real cost with JP the Cat
A live menu-bar total, priced to the cent from your local logs — including the cache-write split most tools miss.
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