Claude Mythos 5.1
Model ID
- Context
- 1M
- 128K max output
- Input price
- $10.00
- per 1M tokens · Claude API
- Output price
- $50.00
- per 1M tokens
- Epoch Capabilities Index
- —
- Not listed
- LMArena Text
- —
- Not listed
Where to run it
2 offerings · prices as listed| Meter | Tier | Price |
|---|---|---|
Claude API (opens in a new tab) claude-mythos-5-1 | ||
| Input | Standard | $10.00 / 1M tokens |
| Batch | $5.00 / 1M tokens | |
| Output | Standard | $50.00 / 1M tokens |
| Batch | $25.00 / 1M tokens | |
| Cache read | Standard | $0.25 / 1M tokens |
| Cache write | 5-minute cache | $12.50 / 1M tokens |
| 1-hour cache | $20.00 / 1M tokens | |
Amazon Bedrock (opens in a new tab) Claude Mythos 5.1 | ||
| Input | Standard | $11.00 / 1M tokens |
| Output | Standard | $55.00 / 1M tokens |
| Cache read | Standard | $0.28 / 1M tokens |
| Cache write | 5-minute cache | $13.75 / 1M tokens |
| 1-hour cache | $22.00 / 1M tokens | |
News
All news →- Sep 1, 2026 Anthropic releases Claude Mythos 5.1 1M-token context window.
Changes
All changes →- New language model
Cited scores
From third-party leaderboards, not measured by usThis model isn’t on any leaderboard we cite yet.