Claude Mythos 5
AnthropicProprietaryReasoningReleased Jun 9, 2026
Overall score
—
Not enough evidence to rank yet
Context window
1M
1,000,000 tokens
Price per 1M tokens
$10.00 in · $50.00 out
✓ Verified on Anthropic's pricing page
Blended price
$20.00
3:1 input:output tokens
Output speed
—
Not measured yet
Category scores
Scores per capability area with the model's rank among ranked models in that category.
- 1Knowledge92.4
- 2Multimodal89.7
- 3Coding88.1
- 4Agentic & tool use84.1
Benchmark results (19)
As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.
Agentic & tool use
| Terminal-Bench 2.1 | 88.0 | #9 of 68 |
| BrowseComp | 88.0 | #10 of 50 |
| OSWorld-Verified | 85.0 | #2 of 35 |
| CyberGym | 83.8 | #9 of 25 |
Multimodal
| CharXiv | 93.5 | #1 of 42 |
| CharXiv w/o tools | 88.9 | #1 of 14 |
| SWE-bench Multimodal | 54.9 | #3 of 7 |
Knowledge
| GPQA | 94.1 | #4 of 117 |
| HLE | 64.5 | #3 of 69 |
| HLE w/o tools | 59.0 | #3 of 43 |
Coding
| SWE-bench Verified | 95.5 | #2 of 98 |
| SWE-bench Pro | 80.3 | #4 of 69 |
Multilingual
| SWE Multilingual | 92.2 | #2 of 46 |
Math
| USAMO 2026 | 97.6 | #1 of 3 |
Pricing by source
USD per 1M tokens.
| Source | Input | Output | Cached in |
|---|---|---|---|
| ✓ Official (Anthropic) checked Oct 17, 2026 · Claude Mythos 5 | $10.00 | $50.00 | $1.00 |
| BenchLM list price | $10.00 | $50.00 | $1.00 |
Limited availability.
Anthropic's June 9, 2026 Claude Fable 5 and Claude Mythos 5 launch says both models are offered at $10 input / $50 output per million tokens. Mythos 5 is restricted to Glasswing partners and trusted access programs.
Speed
Measured by us through OpenRouter (median of trials).
Not available on OpenRouter, so we cannot measure it yet.