Claude Mythos Preview API Pricing
Claude Mythos Preview is a restricted cybersecurity preview, now superseded for approved partners by Claude Mythos 5. The historical archive rate remains $25/M input and $125/M output; Anthropic lists Mythos 5 at $10/M input and $50/M output.
Claude Mythos Preview API cost calculator.
Archive calculator pre-loaded with Claude Mythos Preview rates. Tweak spend, output mix, or cache hit rate to compare legacy bills with current replacements.
Claude Mythos Preview cost on real workloads.
Repo-wide bug fix
Reading 100-page contracts
Support agent ticket triage
Research planning turn
This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| Claude Mythos Preview Current | $25.00 | $125 | $33.00 agentic 92/8 | documented elsewhere | Historical restricted preview |
| Claude Mythos 5 | $10.00 cache $1.00 | $50.00 | $6.82 −4.8× | 1M | Approved trusted access |
| Claude Fable 5 | $10.00 cache $1.00 | $50.00 | $6.82 −4.8× | 1M | Generally available flagship usage |
| Claude Sonnet 4.6 | $3.00 cache $0.30 | $15.00 | $2.05 −16× | 1M | Legacy Claude production baselines |
| Claude Haiku 4.5 | $1.00 cache $0.10 | $5.00 | $0.682 −48× | 200K | Low-cost Claude archive checks |
| Claude Opus 4.7 | $5.00 cache $0.50 | $25.00 | $3.41 −9.7× | 1M | Current replacement workloads |
| GPT-6.1 Sol | $2.00 cache $0.10 | $10.00 | $1.29 −26× | 1.05M | OpenAI's balanced model for coding and agents |
| Gemini 3.8 Flash | $0.75 cache $0.075 | $3.75 | $0.481 −69× · promo | 1M | Gemini long-context work |
Claude Mythos Preview API pricing FAQ.
Short answers for teams checking Claude Mythos Preview pricing, status, and migration choices.
Q · 01 Is Claude Mythos Preview still available? +
$25/M input and $125/M output. On June 9, 2026, Anthropic launched Claude Mythos 5 at $10/M input and $50/M output for restricted trusted access.Q · 02 How much did Claude Mythos Preview cost? +
Q · 03 Is cached-input pricing included? +
Q · 04 What should teams use instead? +
a current model and other current rows in the shelf.