# Grok 4.3 vs Kimi K2.6

> Side-by-side benchmark comparison for Grok 4.3 and Kimi K2.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-3-vs-kimi-2-6
- Last updated: September 10, 2026

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

## Quick Verdict

Pick Kimi K2.6 if you want the stronger benchmark profile. Grok 4.3 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Kimi K2.6 leads overall 65.39 to 59.73.
- The clearest category separation is in agentic, where the averages are 26.9 for Grok 4.3 and 46.7 for Kimi K2.6.
- The biggest single benchmark swing is Gert Labs in Agentic, with scores of 43.86% and 56.82%.
- Grok 4.3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.3 also has the larger context window at 1M.

## Model Snapshot

| Property | Grok 4.3 | Kimi K2.6 |
|----------|----------|----------|
| Creator | xAI | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 256K |
| Overall Score | 59.73 | 65.39 |
| Benchmarks Covered | 7 | 37 |
| Pricing (input/output) | $1.25 / $2.50 | $0.95 / $4.00 |

## Category Breakdown

### Agentic

- Winner: Kimi K2.6
- Grok 4.3 public-lane score: 26.9 (Supported · #144/152)
- Kimi K2.6 public-lane score: 46.7 (Supported · #74/152)

| Benchmark | Grok 4.3 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 43.86% | 56.82% | Kimi K2.6 |
| ResearchClawBench | 12.4% | 18.0% | Kimi K2.6 |
| Terminal-Bench 2.1 (Vals) | 41.9% | 53.6% | Kimi K2.6 |
| 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 |
| OSWorld 2.0 | Coming soon | 4.6% | Coming soon |

### Coding

- Winner: Kimi K2.6
- Grok 4.3 public-lane score: 33.6 (Supported · #131/151)
- Kimi K2.6 public-lane score: 50.8 (Supported · #52/151)

| Benchmark | Grok 4.3 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench (Vals) | 84.5% | 86.8% | Kimi K2.6 |
| SWE-bench (Vals) | 71.4% | 76.2% | Kimi K2.6 |
| 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 |
| 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 |

### Multimodal & Grounded

- Winner: Coming soon
- Grok 4.3 public-lane score: 65.6 (#25/48)
- Kimi K2.6 public-lane score: 64 (#26/48)

| Benchmark | Grok 4.3 | 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 |

### Reasoning

- Winner: Coming soon
- Grok 4.3 public-lane score: 65.2 (Unranked · 2 rankable rows)
- Kimi K2.6 public-lane score: Coming soon

### Knowledge

- Winner: Kimi K2.6
- Grok 4.3 public-lane score: 57 (Supported · #44/183)
- Kimi K2.6 public-lane score: 61.5 (Supported · #32/183)

| Benchmark | Grok 4.3 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 91.4% | 89.1% | Grok 4.3 |
| MMLU-Pro (Vals) | 85.8% | 87.6% | Kimi K2.6 |
| GPQA | Coming soon | 90.5% | Coming soon |
| GPQA-D | Coming soon | 90.5% | Coming soon |
| HLE | Coming soon | 34.7% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Grok 4.3 public-lane score: 94.4 (#2/123)
- Kimi K2.6 public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- Grok 4.3 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 71.3 (#1/7)

| Benchmark | Grok 4.3 | 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, Grok 4.3 or Kimi K2.6?

Kimi K2.6 is ahead overall on BenchLM right now.

### Where is the biggest gap between Grok 4.3 and Kimi K2.6?

The widest category gap is in agentic, where the averages are 26.9 for Grok 4.3 and 46.7 for Kimi K2.6.

### How many benchmarks does Grok 4.3 cover on BenchLM?

Grok 4.3 currently has 7 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

- [Grok 4.3 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-grok-4-3)
- [Kimi K2.6 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-kimi-2-6)
- [Grok 4.3 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-3)
- [Kimi K2.6 vs GPT-6 Astra](/compare/gpt-6-astra-vs-kimi-2-6)

## Explore More

- [Grok 4.3 profile](/models/grok-4-3)
- [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)