# Claude Mythos 5.2 vs GPT-6 Astra

> Side-by-side benchmark comparison for Claude Mythos 5.2 and GPT-6 Astra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-mythos-5-2-vs-gpt-6-astra
- Last updated: November 10, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick GPT-6 Astra if you want the stronger benchmark profile. Claude Mythos 5.2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-6 Astra leads overall 84.98 to 0.
- The biggest single benchmark swing is Terminal-Bench 4.0 in Agentic, with scores of 70.50% and 57.90%.
- Claude Mythos 5.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-6 Astra also has the larger context window at 1.05M.

## Model Snapshot

| Property | Claude Mythos 5.2 | GPT-6 Astra |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1.05M |
| Overall Score | null | 84.98 |
| Benchmarks Covered | 14 | 56 |
| Pricing (input/output) | $8.00 / $40.00 | $10.00 / $50.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Mythos 5.2 public-lane score: Coming soon
- GPT-6 Astra public-lane score: 73.5 (Supported · #9/132)

| Benchmark | Claude Mythos 5.2 | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 70.50% | 57.90% | Claude Mythos 5.2 |
| Terminal-Bench-Science 0.1 | 75.3% | 64.6% | Claude Mythos 5.2 |
| CVE Rediscovery | 89.6% | Coming soon | Coming soon |
| ExploitGym | 38.1% | 42.4% | GPT-6 Astra |
| Binary Exploitation Benchmark | 148 | Coming soon | Coming soon |
| Terminal-Bench 4.1 | Coming soon | 60.30% | Coming soon |
| LifeVal | Coming soon | 80.6% | Coming soon |
| BrowseComp | Coming soon | 91.5% | Coming soon |
| OSWorld 2.0 | Coming soon | 72.6% | Coming soon |
| Agents' Last Exam | Coming soon | 59.3% | Coming soon |
| AutomationBench | Coming soon | 41.4% | Coming soon |
| HLE w/ tools | Coming soon | 57.2% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 87.3% | Coming soon |
| ApprenticeBench | Coming soon | 68% | Coming soon |
| CWE-bench v1 | Coming soon | 68.0% | Coming soon |
| Hermes Index | Coming soon | 56.3% | Coming soon |
| Hermes Bench | Coming soon | 73.7% | Coming soon |
| MazeBench | Coming soon | 23% | Coming soon |
| OSWorld 2.1 | Coming soon | 75.8% | Coming soon |
| RoboDojo Sim | Coming soon | 29.8% | Coming soon |
| Remote Labor Index | Coming soon | 20.8% | Coming soon |
| CWE-bench | Coming soon | 64.2% | Coming soon |

### Coding

- Winner: Not comparable
- Claude Mythos 5.2 public-lane score: Coming soon
- GPT-6 Astra public-lane score: 73.9 (Supported · #6/158)

| Benchmark | Claude Mythos 5.2 | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| ScarfBench | Coming soon | 65.4% | Coming soon |
| DeepSWE | Coming soon | 74.1% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 53.3% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 64.5% | Coming soon |
| FrontierSWE v2 | Coming soon | 65.5% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 44.3% | Coming soon |
| Bug Hunt Bench | Coming soon | 45.0 fixes | Coming soon |
| FrontierCode 2.0 | Coming soon | 42.8% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Mythos 5.2 public-lane score: Coming soon
- GPT-6 Astra public-lane score: 80.4 (Supported · #3/158)

| Benchmark | Claude Mythos 5.2 | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| BioBasicsBench | Coming soon | 67.0% | Coming soon |
| STEMBench | Coming soon | 2.81 | Coming soon |
| ARC-AGI-1 | Coming soon | 97.50% | Coming soon |
| ARC-AGI-2 | Coming soon | 95% | Coming soon |
| ARC-AGI-3 | Coming soon | 62.7% | Coming soon |
| GeneBench-Pro | Coming soon | 37.8% | Coming soon |
| MRCR v2 256K-512K | Coming soon | 100.0% | Coming soon |
| MRCR v2 512K-1M | Coming soon | 96.3% | Coming soon |
| GraphWalks BFS 256K–1M | Coming soon | 71.8% | Coming soon |
| ARC-AGI-3 Provider Adapter | Coming soon | 98.55% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Mythos 5.2 public-lane score: Coming soon
- GPT-6 Astra public-lane score: 78.9 (Supported · #4/67)

| Benchmark | Claude Mythos 5.2 | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| Biomedical image analysis | 80.7% | 77.5% | Claude Mythos 5.2 |
| ExtractBench Pro | Coming soon | 58% | Coming soon |
| ExtractBench (LlamaIndex) | Coming soon | 91.91% | Coming soon |
| ParseBench | Coming soon | 69.81% | Coming soon |
| ScreenSpot Pro | Coming soon | 92.7% | Coming soon |
| BenchCAD Vision2Code (tools) | Coming soon | 0.959 | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Mythos 5.2 public-lane score: Coming soon
- GPT-6 Astra public-lane score: 83.8 (Supported · #5/179)

| Benchmark | Claude Mythos 5.2 | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| De novo protein-binder design | 85.1% | Coming soon | Coming soon |
| Protein Design | 64.6% | Coming soon | Coming soon |
| SingleCellBench | 65.6% | Coming soon | Coming soon |
| Protocols (troubleshooting) | 77.1% | Coming soon | Coming soon |
| Protein Domain ID | 91.8% | Coming soon | Coming soon |
| Protein Mutation Attribution | 51.5% | Coming soon | Coming soon |
| Morphology-to-molecule matching | 35.2% | 22.8% | Claude Mythos 5.2 |
| Medicinal chemistry | 69.0% | Coming soon | Coming soon |
| GPQA | Coming soon | 96% | Coming soon |
| GPQA-D | Coming soon | 96.0% | Coming soon |
| HealthBench (raw) | Coming soon | 56.9% | Coming soon |
| HealthBench (length-adjusted) | Coming soon | 58.3% | Coming soon |
| HealthBench Professional | Coming soon | 64.7% | Coming soon |
| HealthBench Professional (raw) | Coming soon | 68.2% | Coming soon |
| HealthBench Hard | Coming soon | 36.6% | Coming soon |
| PhysicianBench | Coming soon | 48.0% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Mythos 5.2 public-lane score: Coming soon
- GPT-6 Astra public-lane score: Coming soon

| Benchmark | Claude Mythos 5.2 | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 8.5% | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Mythos 5.2 public-lane score: Coming soon
- GPT-6 Astra public-lane score: 93.8 (Unranked · 2 rankable rows)

| Benchmark | Claude Mythos 5.2 | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tier 4) | Coming soon | 97.600% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 93.684% | Coming soon |

## FAQ

### Which is better overall, Claude Mythos 5.2 or GPT-6 Astra?

GPT-6 Astra is ahead overall on BenchLM right now.

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

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

### How many benchmarks does GPT-6 Astra cover on BenchLM?

GPT-6 Astra currently has 56 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Mythos 5.2 vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-mythos-5-2)
- [GPT-6 Astra vs Claude Mythos 5](/compare/claude-mythos-5-vs-gpt-6-astra)
- [Claude Mythos 5.2 vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-claude-mythos-5-2)
- [GPT-6 Astra vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-gpt-6-astra)

## Explore More

- [Claude Mythos 5.2 profile](/models/claude-mythos-5-2)
- [GPT-6 Astra profile](/models/gpt-6-astra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)