# Claude Mythos 5.1 vs Claude Mythos 5.2

> Side-by-side benchmark comparison for Claude Mythos 5.1 and Claude Mythos 5.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-mythos-5-1-vs-claude-mythos-5-2
- Last updated: November 9, 2026

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Treat this as a split decision: use the category and benchmark breakdown to decide which profile better matches your workload.

## Summary

- Claude Mythos 5.1 and Claude Mythos 5.2 are tied on overall score, so the decision depends on category fit rather than the headline number.
- The biggest single benchmark swing is Binary Exploitation Benchmark in Agentic, with scores of 84 and 148.
- Claude Mythos 5.1 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Mythos 5.1 | Claude Mythos 5.2 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | null |
| Benchmarks Covered | 10 | 14 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $8.00 / $40.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Mythos 5.1 public-lane score: Coming soon
- Claude Mythos 5.2 public-lane score: Coming soon

| Benchmark | Claude Mythos 5.1 | Claude Mythos 5.2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 60.90% | 70.50% | Claude Mythos 5.2 |
| CVE Rediscovery | 78.3% | 89.6% | Claude Mythos 5.2 |
| ExploitGym | 23.4% | 38.1% | Claude Mythos 5.2 |
| Binary Exploitation Benchmark | 84 | 148 | Claude Mythos 5.2 |
| Terminal-Bench-Science 0.1 | Coming soon | 75.3% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Mythos 5.1 public-lane score: Coming soon
- Claude Mythos 5.2 public-lane score: Coming soon

| Benchmark | Claude Mythos 5.1 | Claude Mythos 5.2 | Winner |
|-----------|-----------|-----------|--------|
| Biomedical image analysis | Coming soon | 80.7% | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Mythos 5.1 public-lane score: Coming soon
- Claude Mythos 5.2 public-lane score: Coming soon

| Benchmark | Claude Mythos 5.1 | Claude Mythos 5.2 | Winner |
|-----------|-----------|-----------|--------|
| Protein Domain ID | 63.5% | 91.8% | Claude Mythos 5.2 |
| Protein Mutation Attribution | 48.0% | 51.5% | Claude Mythos 5.2 |
| De novo protein-binder design | 79.1% | 85.1% | Claude Mythos 5.2 |
| SingleCellBench | 61.8% | 65.6% | Claude Mythos 5.2 |
| Protocols (troubleshooting) | 70.2% | 77.1% | Claude Mythos 5.2 |
| Medicinal chemistry | 57.7% | 69.0% | Claude Mythos 5.2 |
| Protein Design | Coming soon | 64.6% | Coming soon |
| Morphology-to-molecule matching | Coming soon | 35.2% | Coming soon |

## FAQ

### Which is better overall, Claude Mythos 5.1 or Claude Mythos 5.2?

Claude Mythos 5.1 and Claude Mythos 5.2 are tied on overall score in the current BenchLM data.

### How many benchmarks does Claude Mythos 5.1 cover on BenchLM?

Claude Mythos 5.1 currently has 10 sourced benchmark scores on BenchLM.

### How many benchmarks does Claude Mythos 5.2 cover on BenchLM?

Claude Mythos 5.2 currently has 14 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Mythos 5.1 vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-mythos-5-1)
- [Claude Mythos 5.2 vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-mythos-5-2)
- [Claude Mythos 5.1 vs Claude Mythos Preview](/compare/claude-mythos-5-1-vs-claude-mythos-preview)
- [Claude Mythos 5.2 vs Claude Mythos Preview](/compare/claude-mythos-5-2-vs-claude-mythos-preview)

## Explore More

- [Claude Mythos 5.1 profile](/models/claude-mythos-5-1)
- [Claude Mythos 5.2 profile](/models/claude-mythos-5-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)