# Claude Mythos Preview vs Claude Opus 4.6

> Side-by-side benchmark comparison for Claude Mythos Preview and Claude Opus 4.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-mythos-preview-vs-claude-opus-4-6
- Last updated: October 12, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Mythos Preview and Claude Opus 4.6 share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Claude Opus 4.6 has the lower published output-token price.
- Claude Opus 4.6 has the larger published context window at 1M.

## Model Snapshot

| Property | Claude Mythos Preview | Claude Opus 4.6 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Non-Reasoning |
| Context | null | 1M |
| Independent public score (not head-to-head) | null | 61.23 |
| Benchmarks Covered | 2 | 36 |
| Pricing (input/output) | $25.00 / $125.00 | $5.00 / $25.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.6 public-lane score: 44.3 (Supported · #54/123)

| Benchmark | Claude Mythos Preview | Claude Opus 4.6 | Winner |
|-----------|-----------|-----------|--------|
| CyberGym | 83.1% | 66.6% | Claude Mythos Preview |
| ExploitGym | 17.5% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 65.4% | Coming soon |
| BrowseComp | Coming soon | 83.7% | Coming soon |
| OSWorld-Verified | Coming soon | 72.7% | Coming soon |
| AndroidWorld | Coming soon | 62.0% | Coming soon |
| Claw-Eval | Coming soon | 70.4% | Coming soon |
| DeepSearchQA | Coming soon | 73.7% | Coming soon |
| Gert Labs | Coming soon | 61.85% | Coming soon |
| ResearchClawBench | Coming soon | 19.9% | Coming soon |
| JobBench | Coming soon | 36.7% | Coming soon |
| ApprenticeBench | Coming soon | 5% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.6 public-lane score: 46.7 (Supported · #51/148)

| Benchmark | Claude Mythos Preview | Claude Opus 4.6 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | Coming soon | 80.8% | Coming soon |
| SWE-bench Verified* | Coming soon | 75.6% | Coming soon |
| LiveCodeBench Pro | Coming soon | 70.7% | Coming soon |
| SWE-bench Pro | Coming soon | 53.4% | Coming soon |
| SWE-Rebench | Coming soon | 65.3% | Coming soon |
| React Native Evals | Coming soon | 84.1% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 65.4% | Coming soon |
| Vibe Code Bench | Coming soon | 57.57% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 26.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.6 public-lane score: 71.9 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.6 public-lane score: 74.5 (#25/54)

| Benchmark | Claude Mythos Preview | Claude Opus 4.6 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 77.3% | Coming soon |
| ERQA | Coming soon | 51.6% | Coming soon |
| ScreenSpot Pro | Coming soon | 83.1% | Coming soon |
| MedXpertQA (MM) | Coming soon | 64.8% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.6 public-lane score: 58.6 (Estimated · #51/180)

| Benchmark | Claude Mythos Preview | Claude Opus 4.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 91.3% | Coming soon |
| GPQA-D | Coming soon | 89.2% | Coming soon |
| SuperGPQA | Coming soon | 95% | Coming soon |
| MMLU-Pro | Coming soon | 82% | Coming soon |
| MMLU-Pro (Arcee) | Coming soon | 89.1% | Coming soon |
| HLE | Coming soon | 53% | Coming soon |
| HLE w/o tools | Coming soon | 40% | Coming soon |
| HealthBench Hard | Coming soon | 14.8% | Coming soon |
| MedXpertQA (Text) | Coming soon | 52.1% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.6 public-lane score: 52.4 (#79/127)

### Mathematics

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.6 public-lane score: 59 (Unranked · 3 rankable rows)

| Benchmark | Claude Mythos Preview | Claude Opus 4.6 | Winner |
|-----------|-----------|-----------|--------|
| AIME25 (Arcee) | Coming soon | 99.8% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 40.700% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 22.900% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Mythos Preview and Claude Opus 4.6?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude Mythos Preview vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-mythos-preview)
- [Claude Opus 4.6 vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-opus-4-6)
- [Claude Mythos Preview vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-claude-mythos-preview)
- [Claude Opus 4.6 vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-claude-opus-4-6)

## Explore More

- [Claude Mythos Preview profile](/models/claude-mythos-preview)
- [Claude Opus 4.6 profile](/models/claude-opus-4-6)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)