# Composer 2.5 vs Kimi K2.6

> Side-by-side benchmark comparison for Composer 2.5 and Kimi K2.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/composer-2-5-vs-kimi-2-6
- Last updated: October 2, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Composer 2.5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Composer 2.5 has the higher overall point estimate 61 to 60.2. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is cursorBench31 in Coding, with scores of 63.2% and 47.6%.
- Composer 2.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Kimi K2.6 also has the larger context window at 256K.

## Model Snapshot

| Property | Composer 2.5 | Kimi K2.6 |
|----------|----------|----------|
| Creator | Cursor | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 256K |
| Overall Score | null | 60.2 |
| Benchmarks Covered | 8 | 37 |
| Pricing (input/output) | $0.50 / $2.50 | $0.95 / $4.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 43.4 (Supported · #54/119)

| Benchmark | Composer 2.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | 66.7% | Composer 2.5 |
| Terminal-Bench 2.1 (Vals) | 58.4% | 53.6% | Composer 2.5 |
| BrowseComp | Coming soon | 83.2% | Coming soon |
| OSWorld-Verified | Coming soon | 73.1% | Coming soon |
| Toolathlon | Coming soon | 50% | Coming soon |
| MCP Atlas | Coming soon | 55.9% | Coming soon |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| DeepSearchQA | Coming soon | 92.5% | Coming soon |
| WideResearch | Coming soon | 80.8% | Coming soon |
| Gert Labs | Coming soon | 56.82% | Coming soon |
| ResearchClawBench | Coming soon | 18.0% | Coming soon |
| OSWorld 2.0 | Coming soon | 4.6% | Coming soon |

### Coding

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 46 (Supported · #51/144)

| Benchmark | Composer 2.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | 66.7% | Composer 2.5 |
| SWE Multilingual | 79.8% | 76.7% | Composer 2.5 |
| cursorBench31 | 63.2% | 47.6% | Composer 2.5 |
| CursorBench 3.2 | 56.1% | Coming soon | Coming soon |
| SWE-bench (Vals) | 79.6% | 76.2% | Composer 2.5 |
| CursorBench 4.0 | 27.7% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 80.2% | Coming soon |
| LiveCodeBench v6 | Coming soon | 89.6% | Coming soon |
| SWE-bench Pro | Coming soon | 58.6% | Coming soon |
| SciCode | Coming soon | 52.2% | Coming soon |
| Vibe Code Bench | Coming soon | 37.89% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 86.8% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 64.9 (#26/49)

| Benchmark | Composer 2.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 79.4% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 80.1% | Coming soon |
| CharXiv | Coming soon | 80.4% | Coming soon |
| MathVision | Coming soon | 87.4% | Coming soon |
| V* | Coming soon | 96.9% | Coming soon |

### Knowledge

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 58.3 (Supported · #46/171)

| Benchmark | Composer 2.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 90.5% | Coming soon |
| GPQA-D | Coming soon | 90.5% | Coming soon |
| HLE | Coming soon | 34.7% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 89.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 87.6% | Coming soon |

### Mathematics

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 71 (#1/7)

| Benchmark | Composer 2.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 96.4% | Coming soon |
| HMMT Feb 2026 | Coming soon | 92.7% | Coming soon |
| MMAnswerBench | Coming soon | 86.0% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 38.966% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 14.580% | Coming soon |

## FAQ

### Which is better overall, Composer 2.5 or Kimi K2.6?

Composer 2.5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### How many benchmarks does Composer 2.5 cover on BenchLM?

Composer 2.5 currently has 8 sourced benchmark scores on BenchLM.

### How many benchmarks does Kimi K2.6 cover on BenchLM?

Kimi K2.6 currently has 37 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Composer 2.5 vs Composer 2](/compare/composer-2-vs-composer-2-5)
- [Kimi K2.6 vs Composer 2](/compare/composer-2-vs-kimi-2-6)
- [Composer 2.5 vs Composer 2 Fast](/compare/composer-2-5-vs-composer-2-fast)
- [Kimi K2.6 vs Composer 2 Fast](/compare/composer-2-fast-vs-kimi-2-6)

## Explore More

- [Composer 2.5 profile](/models/composer-2-5)
- [Kimi K2.6 profile](/models/kimi-2-6)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)