# Grok 4.5 vs Kimi K2.6

> Side-by-side benchmark comparison for Grok 4.5 and Kimi K2.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-5-vs-kimi-2-6
- Last updated: October 7, 2026

- Shared sourced benchmarks: 7
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Grok 4.5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Grok 4.5 has the higher overall point estimate 63.97 to 58.73. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in multimodal & grounded, where the averages are 79.5 for Grok 4.5 and 64.9 for Kimi K2.6.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 67.8% and 53.6%.
- Kimi K2.6 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.5 also has the larger context window at 500K.

## Model Snapshot

| Property | Grok 4.5 | Kimi K2.6 |
|----------|----------|----------|
| Creator | xAI | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 500K | 256K |
| Overall Score | 63.97 | 58.73 |
| Benchmarks Covered | 17 | 37 |
| Pricing (input/output) | $2.00 / $6.00 | $0.95 / $4.00 |

## Category Breakdown

### Agentic

- Winner: Grok 4.5
- Grok 4.5 public-lane score: 57.6 (Supported · #29/122)
- Kimi K2.6 public-lane score: 43.4 (Supported · #56/122)

| Benchmark | Grok 4.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 15.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 83.3% | Coming soon | Coming soon |
| deepSwe | 53% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 67.8% | 53.6% | Grok 4.5 |
| 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 |

### Coding

- Winner: Grok 4.5
- Grok 4.5 public-lane score: 57.7 (Supported · #27/146)
- Kimi K2.6 public-lane score: 44.7 (Supported · #54/146)

| Benchmark | Grok 4.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 64.7% | 58.6% | Grok 4.5 |
| SWE Multilingual | 78% | 76.7% | Grok 4.5 |
| Terminal-Bench 2.1 | 83.3% | Coming soon | Coming soon |
| CursorBench 3.2 | 66.7% | Coming soon | Coming soon |
| VulcanBench v3 | 89.9% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.4% | 86.8% | Grok 4.5 |
| SWE-bench (Vals) | 86.6% | 76.2% | Grok 4.5 |
| PostTrainBench v1.1 | 23.4% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 80.2% | Coming soon |
| LiveCodeBench v6 | Coming soon | 89.6% | 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 |

### Reasoning

- Winner: Not comparable
- Grok 4.5 public-lane score: 50.4 (#28/28)
- Kimi K2.6 public-lane score: Coming soon

| Benchmark | Grok 4.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 52.6% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.3% | Coming soon | Coming soon |
| ARC-AGI-1 | 85.67% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Grok 4.5 public-lane score: 79.5 (Unranked · 1 rankable row)
- Kimi K2.6 public-lane score: 64.9 (#26/49)

| Benchmark | Grok 4.5 | 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: Grok 4.5
- Grok 4.5 public-lane score: 67 (Supported · #19/174)
- Kimi K2.6 public-lane score: 58.2 (Supported · #46/174)

| Benchmark | Grok 4.5 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 92.9% | 89.1% | Grok 4.5 |
| MMLU-Pro (Vals) | 89.2% | 87.6% | Grok 4.5 |
| GPQA | Coming soon | 90.5% | Coming soon |
| GPQA-D | Coming soon | 90.5% | Coming soon |
| HLE | Coming soon | 34.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- Grok 4.5 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 71 (#1/7)

| Benchmark | Grok 4.5 | 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, Grok 4.5 or Kimi K2.6?

Grok 4.5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Grok 4.5 and Kimi K2.6?

The widest category gap is in multimodal & grounded, where the averages are 79.5 for Grok 4.5 and 64.9 for Kimi K2.6.

### How many benchmarks does Grok 4.5 cover on BenchLM?

Grok 4.5 currently has 17 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 4.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-5)
- [Kimi K2.6 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-kimi-2-6)
- [Grok 4.5 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-5)
- [Kimi K2.6 vs GPT-6 Astra](/compare/gpt-6-astra-vs-kimi-2-6)

## Explore More

- [Grok 4.5 profile](/models/grok-4-5)
- [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)