Claude Mythos 5.1
- Input price
- $10.00
- Per 1 million tokens (USD)
- Output price
- $50.00
- Per 1 million tokens (USD)
- Effort levels
- 5total
- Default: High
- Benchmark results
- 7total
- Benchmark types: 3
Model information
- API model ID
- claude-mythos-5-1
- release date
- Unknown
- effort
- Low / Med / High (default) / Xhigh / Max
- Effort source
- Based on Anthropic effort documentation (platform.claude.com/docs/en/build-with-claude/effort).
- Claude Code
- unknown
- Codex
- unavailable
- Availability notes
- Claude Code is not stated. limited availability. Codex's official model list (learn.chatgpt.com/docs/models) contains only OpenAI models, so codex is false (connections via a custom provider are not counted as official options).
- Availability source
- https://code.claude.com/docs/en/model-config
Price (USD per 1 million tokens)
Prices do not vary by effort; token consumption does.
| input | $10.00 |
|---|---|
| output | $50.00 |
| cache read | $0.25 |
| cache write | $12.50 |
cacheWritePerMTok is for a 5-minute cache write. 1h write $20.
Claude Mythos 5.1 (limited availability) | $10 / MTok | $12.50 / MTok | $20 / MTok | $0.25 / MTok | $50 / MTokSource: https://platform.claude.com/docs/en/about-claude/pricing
Benchmark results
| Benchmark | effort | Score | Source cost (metric) | measured/reported by | source | Conditions and extraction method |
|---|---|---|---|---|---|---|
| CVE RediscoveryLow | Low | 65.9% | $0.59Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from textSource excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Low: 65.9% $0.59" |
| CVE RediscoveryMed | Med | 69.8% | $0.89Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from textSource excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Med: 69.8% $0.89" |
| CVE RediscoveryHigh (default) | High | 73.8% | $1.39Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from textSource excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · High: 73.8% $1.39" |
| CVE RediscoveryXhigh | Xhigh | 77.8% | $2.81Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from textSource excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Xhigh: 77.8% $2.81" |
| CVE RediscoveryMax | Max | 78.3% | $4.14Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from textSource excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Max: 78.3% $4.14" |
| CyScenarioBenchnot stated | not stated | 61.7% | — | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2official · Retrieved 2026-11-12 | Vendor-reported value. table note: Scores for Fable 5.2, Fable 5.1, and Opus 5.5 show results with safeguards on unless otherwise noted. All scores show each model’s highest-available effort unless otherwise noted.transcribed from tableSource excerpt61.7%Location Table, CyScenarioBench row: 61.7% Mythos 5.1 |
| De novo binder design (24 hours)not stated | not stated | 79.1 | — | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2official · Retrieved 2026-11-12 | Vendor-reported value. table note: Scores for Fable 5.2, Fable 5.1, and Opus 5.5 show results with safeguards on unless otherwise noted. All scores show each model’s highest-available effort unless otherwise noted.transcribed from tableSource excerpt79.1Location Table, Protein design row: 79.1 Mythos 5.1 |