# Claude Mythos Preview vs Claude Opus 4.7 (Adaptive)

> Side-by-side benchmark comparison for Claude Mythos Preview and Claude Opus 4.7 (Adaptive) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-mythos-preview-vs-claude-opus-4-7-adaptive
- Last updated: September 29, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Mythos Preview and Claude Opus 4.7 (Adaptive) 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 4.7 (Adaptive) has the lower published output-token price.
- Claude Opus 4.7 (Adaptive) has the larger published context window at 1M.

## Model Snapshot

| Property | Claude Mythos Preview | Claude Opus 4.7 (Adaptive) |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | null | 1M |
| Independent public score (not head-to-head) | null | 68.46 |
| Benchmarks Covered | 2 | 21 |
| 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 4.7 (Adaptive) public-lane score: 59.1 (Supported · #22/117)

| Benchmark | Claude Mythos Preview | Claude Opus 4.7 (Adaptive) | Winner |
|-----------|-----------|-----------|--------|
| CyberGym | 83.1% | 73.1% | Claude Mythos Preview |
| ExploitGym | 17.5% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 69.4% | Coming soon |
| BrowseComp | Coming soon | 79.3% | Coming soon |
| MCP Atlas | Coming soon | 77.3% | Coming soon |
| OSWorld-Verified | Coming soon | 78% | Coming soon |
| OSWorld 2.0 | Coming soon | 18.2% | Coming soon |
| JobBench | Coming soon | 45.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.7 (Adaptive) public-lane score: 57.9 (Estimated · #24/143)

| Benchmark | Claude Mythos Preview | Claude Opus 4.7 (Adaptive) | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | Coming soon | 87.6% | Coming soon |
| SWE-bench Pro | Coming soon | 64.3% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 69.4% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.7 (Adaptive) public-lane score: 53.6 (Unranked · 3 rankable rows)

| Benchmark | Claude Mythos Preview | Claude Opus 4.7 (Adaptive) | Winner |
|-----------|-----------|-----------|--------|
| MRCR v2 128K-256K | Coming soon | 59.2% | Coming soon |
| ARC-AGI-2 | Coming soon | 75.8% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.2% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.7 (Adaptive) public-lane score: 50.1 (#39/50)

| Benchmark | Claude Mythos Preview | Claude Opus 4.7 (Adaptive) | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 43.6% | Coming soon |
| CharXiv | Coming soon | 91% | Coming soon |
| CharXiv w/o tools | Coming soon | 82.1% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.7 (Adaptive) public-lane score: 63.9 (Estimated · #29/169)

| Benchmark | Claude Mythos Preview | Claude Opus 4.7 (Adaptive) | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 94.2% | Coming soon |
| GPQA-D | Coming soon | 94.2% | Coming soon |
| HLE | Coming soon | 54.7% | Coming soon |
| HLE w/o tools | Coming soon | 46.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Mythos Preview public-lane score: Coming soon
- Claude Opus 4.7 (Adaptive) public-lane score: Coming soon

| Benchmark | Claude Mythos Preview | Claude Opus 4.7 (Adaptive) | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | Coming soon | 43.8% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Mythos Preview and Claude Opus 4.7 (Adaptive)?

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 4.7 (Adaptive) vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-opus-4-7-adaptive)
- [Claude Mythos Preview vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-claude-mythos-preview)
- [Claude Opus 4.7 (Adaptive) vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-claude-opus-4-7-adaptive)

## Explore More

- [Claude Mythos Preview profile](/models/claude-mythos-preview)
- [Claude Opus 4.7 (Adaptive) profile](/models/claude-opus-4-7-adaptive)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)