# Claude Opus 4.5 vs Kimi K2.5

> Side-by-side benchmark comparison for Claude Opus 4.5 and Kimi K2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-vs-kimi-k2-5
- Last updated: October 17, 2026

- Shared sourced benchmarks: 51
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Opus 4.5 if you want the stronger benchmark profile. Kimi K2.5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Opus 4.5 leads overall 54.05 to 53.05.
- The clearest category separation is in instruction following, where the averages are 31.9 for Claude Opus 4.5 and 85.8 for Kimi K2.5.
- The biggest single benchmark swing is PolyMath in Multilingual, with scores of 79.0% and 43.1%.
- Kimi K2.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Kimi K2.5 also has the larger context window at 256K.

## Model Snapshot

| Property | Claude Opus 4.5 | Kimi K2.5 |
|----------|----------|----------|
| Creator | Anthropic | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 256K |
| Overall Score | 54.05 | 53.05 |
| Benchmarks Covered | 61 | 68 |
| Pricing (input/output) | $5.00 / $25.00 | $0.60 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 32.3 (Estimated · #89/128)
- Kimi K2.5 public-lane score: 40.7 (Estimated · #66/128)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | 50.8% | Claude Opus 4.5 |
| OSWorld-Verified | 66.3% | 63.3% | Claude Opus 4.5 |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | 52.3% | Claude Opus 4.5 |
| QwenClawBench | 52.3% | 54.3% | Kimi K2.5 |
| τ³-bench results | 70.2% | 65.7% | Claude Opus 4.5 |
| VITA-Bench | 23.3% | Coming soon | Coming soon |
| DeepPlanning | 26.4% | 14.4% | Claude Opus 4.5 |
| Toolathlon | 43.5% | 27.8% | Claude Opus 4.5 |
| MCP Atlas | 42.3% | 29.5% | Claude Opus 4.5 |
| MCP-Tasks | 71.8% | 59.1% | Claude Opus 4.5 |
| WideResearch | 76.4% | 72.7% | Claude Opus 4.5 |
| CyberGym | 50.6% | Coming soon | Coming soon |
| Gert Labs | 64.23% | 45.88% | Claude Opus 4.5 |
| JobBench | 32.3% | 8.7% | Claude Opus 4.5 |
| BrowseComp | Coming soon | 60.6% | Coming soon |
| DeepSearchQA | Coming soon | 77.1% | Coming soon |
| BFCL v4 | Coming soon | 68.3% | Coming soon |
| ResearchClawBench | Coming soon | 14.0% | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 40.3 (Estimated · #64/150)
- Kimi K2.5 public-lane score: 38.5 (Estimated · #68/150)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | 76.8% | Claude Opus 4.5 |
| LiveCodeBench v6 | 84.8% | 85.0% | Kimi K2.5 |
| SWE-bench Pro | 57.1% | 50.7% | Claude Opus 4.5 |
| SWE Multilingual | 77.5% | 73% | Claude Opus 4.5 |
| NL2Repo | 43.2% | 32% | Claude Opus 4.5 |
| Terminal-Bench 2.0 | 59.3% | 50.8% | Claude Opus 4.5 |
| SWE-bench Verified* | Coming soon | 70.8% | Coming soon |
| SWE-Rebench | Coming soon | 58.5% | Coming soon |
| React Native Evals | Coming soon | 77.2% | Coming soon |
| SciCode | Coming soon | 48.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 78.3 (Unranked · 4 rankable rows)
- Kimi K2.5 public-lane score: 72.2 (Unranked · 3 rankable rows)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | 61% | Claude Opus 4.5 |
| AI-Needle | 74% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Kimi K2.5
- Claude Opus 4.5 public-lane score: 48.6 (#49/54)
- Kimi K2.5 public-lane score: 70.4 (#32/54)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 80.7% | 84.3% | Kimi K2.5 |
| MMMU-Pro | 70.6% | 78.5% | Kimi K2.5 |
| RealWorldQA | 77.0% | 81.0% | Kimi K2.5 |
| OmniDocBench 1.5 | 87.7% | 88.8% | Kimi K2.5 |
| Video-MME (with subtitle) | 77.6% | 87.4% | Kimi K2.5 |
| Video-MME (w/o subtitle) | 81.4% | 83.2% | Kimi K2.5 |
| MathVision | 74.3% | 84.2% | Kimi K2.5 |
| We-Math | 70.0% | 84.7% | Kimi K2.5 |
| DynaMath | 79.7% | 84.4% | Kimi K2.5 |
| SimpleVQA | 65.7% | 71.2% | Kimi K2.5 |
| CharXiv | 68.5% | 77.5% | Kimi K2.5 |
| CountBench | 90.6% | 94.1% | Kimi K2.5 |
| AI2D_TEST | 87.7% | 90.8% | Kimi K2.5 |
| ERQA | 46.8% | Coming soon | Coming soon |
| VideoMMMU | 84.4% | 86.6% | Kimi K2.5 |
| MLVU (M-Avg) | 81.7% | 85.0% | Kimi K2.5 |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | Coming soon | Coming soon |
| Video-MME | Coming soon | 87.4% | Coming soon |
| MMLongBench-Doc | Coming soon | 58.5% | Coming soon |
| CC-OCR | Coming soon | 79.7% | Coming soon |
| RefCOCO (avg) | Coming soon | 87.8% | Coming soon |
| MMVU | Coming soon | 80.4% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 51.2 (Estimated · #77/184)
- Kimi K2.5 public-lane score: 51.4 (Estimated · #75/184)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | 87.6% | Kimi K2.5 |
| SuperGPQA | 70.6% | 69.2% | Claude Opus 4.5 |
| MMLU-Pro | 89.5% | 87.1% | Claude Opus 4.5 |
| MMLU-Redux | 96.6% | 94.5% | Claude Opus 4.5 |
| C-Eval | 92.2% | 94% | Kimi K2.5 |
| HLE | 30.8% | 30.1% | Claude Opus 4.5 |
| GPQA-D | Coming soon | 87.6% | Coming soon |
| MMLU-Pro (Arcee) | Coming soon | 87.1% | Coming soon |

### Multilingual

- Winner: Claude Opus 4.5
- Claude Opus 4.5 public-lane score: 96.5 (#2/17)
- Kimi K2.5 public-lane score: 87.3 (#8/17)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | 82.3% | Claude Opus 4.5 |
| NOVA-63 | 56.7% | 56.0% | Claude Opus 4.5 |
| INCLUDE | 86.2% | 83.3% | Claude Opus 4.5 |
| PolyMath | 79.0% | 43.1% | Claude Opus 4.5 |
| MAXIFE | 79.2% | 72.8% | Claude Opus 4.5 |

### Instruction Following

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 31.9 (#131/148)
- Kimi K2.5 public-lane score: 85.8 (#48/148)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | 93.9% | Kimi K2.5 |
| IFBench | 58% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 61.3 (#9/12)
- Kimi K2.5 public-lane score: 83.3 (Unranked · 7 rankable rows)

| Benchmark | Claude Opus 4.5 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.1% | 95.8% | Kimi K2.5 |
| HMMT Feb 2025 | 92.9% | 95.4% | Kimi K2.5 |
| HMMT Nov 2025 | 93.3% | 91.1% | Claude Opus 4.5 |
| HMMT Feb 2026 | 85.3% | 87.1% | Kimi K2.5 |
| MMAnswerBench | 84.0% | 81.8% | Claude Opus 4.5 |
| FrontierMath v2 (Tiers 1-3) | 34.386% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 4.878% | Coming soon | Coming soon |
| AIME 2025 | Coming soon | 96.1% | Coming soon |
| AIME25 (Arcee) | Coming soon | 96.3% | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.5 or Kimi K2.5?

Claude Opus 4.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.5 and Kimi K2.5?

The widest category gap is in instruction following, where the averages are 31.9 for Claude Opus 4.5 and 85.8 for Kimi K2.5.

### How many benchmarks does Claude Opus 4.5 cover on BenchLM?

Claude Opus 4.5 currently has 61 sourced benchmark scores on BenchLM.

### How many benchmarks does Kimi K2.5 cover on BenchLM?

Kimi K2.5 currently has 68 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Kimi K2.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-kimi-k2-5)
- [Claude Opus 4.5 vs Kimi K2.5 (Reasoning)](/compare/claude-opus-4-5-vs-kimi-k2-5-reasoning)
- [Kimi K2.5 vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)

## Explore More

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Kimi K2.5 profile](/models/kimi-k2-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)