# Claude 3.5 Sonnet vs Kimi K2.6

> Side-by-side benchmark comparison for Claude 3.5 Sonnet and Kimi K2.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-3-5-sonnet-vs-kimi-2-6
- Last updated: October 10, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Kimi K2.6 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Kimi K2.6 has the higher overall point estimate 58.74 to 28.27. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in mathematics, where the averages are 26.1 for Claude 3.5 Sonnet and 72.2 for Kimi K2.6.
- The biggest single benchmark swing is FrontierMath v2 (Tiers 1-3) in Mathematics, with scores of 2.069% and 38.966%.
- Kimi K2.6 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 | Claude 3.5 Sonnet | Kimi K2.6 |
|----------|----------|----------|
| Creator | Anthropic | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 256K |
| Overall Score | 28.27 | 58.74 |
| Benchmarks Covered | 4 | 37 |
| Pricing (input/output) | $3.00 / $15.00 | $0.95 / $4.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude 3.5 Sonnet public-lane score: Coming soon
- Kimi K2.6 public-lane score: 43.7 (Supported · #57/123)

| Benchmark | Claude 3.5 Sonnet | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 66.7% | Coming soon |
| 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 |
| Terminal-Bench 2.1 (Vals) | Coming soon | 53.6% | Coming soon |

### Coding

- Winner: Not comparable
- Claude 3.5 Sonnet public-lane score: Coming soon
- Kimi K2.6 public-lane score: 43.9 (Supported · #54/146)

| Benchmark | Claude 3.5 Sonnet | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 49% | 80.2% | Kimi K2.6 |
| LiveCodeBench v6 | Coming soon | 89.6% | Coming soon |
| SWE-bench Pro | Coming soon | 58.6% | Coming soon |
| SWE Multilingual | Coming soon | 76.7% | Coming soon |
| SciCode | Coming soon | 52.2% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 66.7% | Coming soon |
| Vibe Code Bench | Coming soon | 37.89% | Coming soon |
| cursorBench31 | Coming soon | 47.6% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 86.8% | Coming soon |
| SWE-bench (Vals) | Coming soon | 76.2% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude 3.5 Sonnet public-lane score: Coming soon
- Kimi K2.6 public-lane score: 73.8 (#27/54)

| Benchmark | Claude 3.5 Sonnet | 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
- Claude 3.5 Sonnet public-lane score: Coming soon
- Kimi K2.6 public-lane score: 59.8 (Supported · #45/177)

| Benchmark | Claude 3.5 Sonnet | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 59.4% | 90.5% | Kimi K2.6 |
| 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
- Claude 3.5 Sonnet public-lane score: 26.1 (Unranked · 2 rankable rows)
- Kimi K2.6 public-lane score: 72.2 (#1/7)

| Benchmark | Claude 3.5 Sonnet | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 2.069% | 38.966% | Kimi K2.6 |
| FrontierMath v2 (Tier 4) | 0.000% | 14.580% | Kimi K2.6 |
| AIME26 | Coming soon | 96.4% | Coming soon |
| HMMT Feb 2026 | Coming soon | 92.7% | Coming soon |
| MMAnswerBench | Coming soon | 86.0% | Coming soon |

## FAQ

### Which is better overall, Claude 3.5 Sonnet or Kimi K2.6?

Kimi K2.6 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Claude 3.5 Sonnet and Kimi K2.6?

The widest category gap is in mathematics, where the averages are 26.1 for Claude 3.5 Sonnet and 72.2 for Kimi K2.6.

### How many benchmarks does Claude 3.5 Sonnet cover on BenchLM?

Claude 3.5 Sonnet currently has 4 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

- [Claude 3.5 Sonnet vs Claude Opus 5.5](/compare/claude-3-5-sonnet-vs-claude-opus-5-5)
- [Kimi K2.6 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-kimi-2-6)
- [Claude 3.5 Sonnet vs GPT-6 Astra](/compare/claude-3-5-sonnet-vs-gpt-6-astra)
- [Kimi K2.6 vs GPT-6 Astra](/compare/gpt-6-astra-vs-kimi-2-6)

## Explore More

- [Claude 3.5 Sonnet profile](/models/claude-3-5-sonnet)
- [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)