# Grok 4.20 vs Kimi K2.6

> Side-by-side benchmark comparison for Grok 4.20 and Kimi K2.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-kimi-2-6
- Last updated: October 10, 2026

- Shared sourced benchmarks: 14
- 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 57.33. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 22.3 for Grok 4.20 and 43.9 for Kimi K2.6.
- The biggest single benchmark swing is Vibe Code Bench in Coding, with scores of 4.06% and 37.89%.
- Grok 4.20 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.20 also has the larger context window at 2M.

## Model Snapshot

| Property | Grok 4.20 | Kimi K2.6 |
|----------|----------|----------|
| Creator | xAI | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 2M | 256K |
| Overall Score | 57.33 | 58.74 |
| Benchmarks Covered | 23 | 37 |
| Pricing (input/output) | $1.25 / $2.50 | $0.95 / $4.00 |

## Category Breakdown

### Agentic

- Winner: Kimi K2.6
- Grok 4.20 public-lane score: 24.4 (Supported · #98/123)
- Kimi K2.6 public-lane score: 43.7 (Supported · #57/123)

| Benchmark | Grok 4.20 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 47.1% | 66.7% | Kimi K2.6 |
| DeepSearchQA | 62.8% | 92.5% | Kimi K2.6 |
| Gert Labs | 38.36% | 56.82% | Kimi K2.6 |
| Terminal-Bench 2.1 (Vals) | 44.2% | 53.6% | Kimi K2.6 |
| 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 |
| WideResearch | Coming soon | 80.8% | Coming soon |
| ResearchClawBench | Coming soon | 18.0% | Coming soon |
| OSWorld 2.0 | Coming soon | 4.6% | Coming soon |

### Coding

- Winner: Kimi K2.6
- Grok 4.20 public-lane score: 22.3 (Supported · #114/146)
- Kimi K2.6 public-lane score: 43.9 (Supported · #54/146)

| Benchmark | Grok 4.20 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 74.2% | Coming soon | Coming soon |
| SWE-bench Verified | 76.7% | 80.2% | Kimi K2.6 |
| SWE-bench Pro | 51.8% | 58.6% | Kimi K2.6 |
| Vibe Code Bench | 4.06% | 37.89% | Kimi K2.6 |
| LiveCodeBench (Vals) | 84.3% | 86.8% | Kimi K2.6 |
| SWE-bench (Vals) | 72.2% | 76.2% | Kimi K2.6 |
| LiveCodeBench v6 | Coming soon | 89.6% | 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 |
| cursorBench31 | Coming soon | 47.6% | Coming soon |

### Reasoning

- Winner: Not comparable
- Grok 4.20 public-lane score: 44.9 (Unranked · 2 rankable rows)
- Kimi K2.6 public-lane score: Coming soon

| Benchmark | Grok 4.20 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 53.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Kimi K2.6
- Grok 4.20 public-lane score: 53.4 (#47/54)
- Kimi K2.6 public-lane score: 73.8 (#27/54)

| Benchmark | Grok 4.20 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 75.2% | 79.4% | Kimi K2.6 |
| CharXiv | 60.9% | 80.4% | Kimi K2.6 |
| ERQA | 54.1% | Coming soon | Coming soon |
| SimpleVQA | 57.4% | Coming soon | Coming soon |
| MedXpertQA (MM) | 65.8% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 80.1% | Coming soon |
| MathVision | Coming soon | 87.4% | Coming soon |
| V* | Coming soon | 96.9% | Coming soon |

### Knowledge

- Winner: Kimi K2.6
- Grok 4.20 public-lane score: 53.1 (Supported · #66/177)
- Kimi K2.6 public-lane score: 59.8 (Supported · #45/177)

| Benchmark | Grok 4.20 | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 88.5% | 90.5% | Kimi K2.6 |
| HLE w/o tools | 31.6% | Coming soon | Coming soon |
| HealthBench Hard | 20.3% | Coming soon | Coming soon |
| MedXpertQA (Text) | 50.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.6% | 89.1% | Kimi K2.6 |
| MMLU-Pro (Vals) | 86.3% | 87.6% | Kimi K2.6 |
| GPQA | Coming soon | 90.5% | Coming soon |
| HLE | Coming soon | 34.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- Grok 4.20 public-lane score: Coming soon
- Kimi K2.6 public-lane score: 72.2 (#1/7)

| Benchmark | Grok 4.20 | 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 4.20 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 Grok 4.20 and Kimi K2.6?

The widest category gap is in coding, where the averages are 22.3 for Grok 4.20 and 43.9 for Kimi K2.6.

### How many benchmarks does Grok 4.20 cover on BenchLM?

Grok 4.20 currently has 23 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 4.20 vs Grok 4.20 Multi-agent](/compare/grok-4-20-beta-vs-grok-4-20-multi-agent-beta)
- [Kimi K2.6 vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-kimi-2-6)
- [Grok 4.20 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-20-beta)
- [Kimi K2.6 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-kimi-2-6)

## Explore More

- [Grok 4.20 profile](/models/grok-4-20-beta)
- [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)