# Claude Mythos 5.1 vs Kimi K2.5 (Reasoning)

> Side-by-side benchmark comparison for Claude Mythos 5.1 and Kimi K2.5 (Reasoning) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-mythos-5-1-vs-kimi-k2-5-reasoning
- Last updated: October 16, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Claude Mythos 5.1 and Kimi K2.5 (Reasoning).

## Summary

- Claude Mythos 5.1 and Kimi K2.5 (Reasoning) do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Claude Mythos 5.1 | Kimi K2.5 (Reasoning) |
|----------|----------|----------|
| Creator | Anthropic | Moonshot AI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 128K |
| Independent public score (not head-to-head) | null | 56.08 |
| Benchmarks Covered | 1 | 15 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.60 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Mythos 5.1 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 38.4 (Estimated · #70/128)

| Benchmark | Claude Mythos 5.1 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 60.90% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| BrowseComp | Coming soon | 60.6% | Coming soon |
| OSWorld-Verified | Coming soon | 63.3% | Coming soon |
| Gert Labs | Coming soon | 32.58% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Mythos 5.1 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Claude Mythos 5.1 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | Coming soon | 76.8% | Coming soon |
| LiveCodeBench v6 | Coming soon | 85.0% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| Vibe Code Bench | Coming soon | 17.54% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Mythos 5.1 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 67.1 (Unranked · 1 rankable row)

| Benchmark | Claude Mythos 5.1 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | Coming soon | 61% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Mythos 5.1 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 69 (#33/54)

| Benchmark | Claude Mythos 5.1 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 78.5% | Coming soon |
| CharXiv | Coming soon | 77.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Mythos 5.1 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 48.7 (Estimated · #85/184)

| Benchmark | Claude Mythos 5.1 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87.6% | Coming soon |
| MMLU-Pro | Coming soon | 87.1% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Mythos 5.1 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Claude Mythos 5.1 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 96.1% | Coming soon |
| HMMT Feb 2025 | Coming soon | 95.4% | Coming soon |

## FAQ

### Can I compare Claude Mythos 5.1 and Kimi K2.5 (Reasoning) on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Claude Mythos 5.1 vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-mythos-5-1)
- [Kimi K2.5 (Reasoning) vs Claude Mythos 5](/compare/claude-mythos-5-vs-kimi-k2-5-reasoning)
- [Claude Mythos 5.1 vs Claude Mythos Preview](/compare/claude-mythos-5-1-vs-claude-mythos-preview)
- [Kimi K2.5 (Reasoning) vs Claude Mythos Preview](/compare/claude-mythos-preview-vs-kimi-k2-5-reasoning)

## Explore More

- [Claude Mythos 5.1 profile](/models/claude-mythos-5-1)
- [Kimi K2.5 (Reasoning) profile](/models/kimi-k2-5-reasoning)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)