# Grok 4.20 vs Kimi K3

> Side-by-side benchmark comparison for Grok 4.20 and Kimi K3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-kimi-k3
- Last updated: October 2, 2026

- Shared sourced benchmarks: 11
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Kimi K3 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Kimi K3 has the higher overall point estimate 72.14 to 59.19. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in multimodal & grounded, where the averages are 35.6 for Grok 4.20 and 89.4 for Kimi K3.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 44.2% and 80.9%.
- 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 K3 |
|----------|----------|----------|
| Creator | xAI | Moonshot AI |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 2M | 1.05M |
| Overall Score | 59.19 | 72.14 |
| Benchmarks Covered | 23 | 48 |
| Pricing (input/output) | $1.25 / $2.50 | $3.00 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Kimi K3
- Grok 4.20 public-lane score: 24 (Supported · #93/119)
- Kimi K3 public-lane score: 68.1 (Supported · #8/119)

| Benchmark | Grok 4.20 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 47.1% | Coming soon | Coming soon |
| DeepSearchQA | 62.8% | 95.0% | Kimi K3 |
| Gert Labs | 38.36% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 44.2% | 80.9% | Kimi K3 |
| Terminal-Bench 2.1 | Coming soon | 88.3% | Coming soon |
| BrowseComp | Coming soon | 91.2% | Coming soon |
| Toolathlon-Verified | Coming soon | 73.2% | Coming soon |
| MCP Atlas | Coming soon | 84.2% | Coming soon |
| AutomationBench | Coming soon | 30.8% | Coming soon |
| JobBench | Coming soon | 52.9% | Coming soon |
| APEX-Agents | Coming soon | 37.6% | Coming soon |
| SpreadsheetBench 2 | Coming soon | 34.8% | Coming soon |
| DECK-Bench | Coming soon | 73.5% | Coming soon |
| ApprenticeBench | Coming soon | 18% | Coming soon |

### Coding

- Winner: Kimi K3
- Grok 4.20 public-lane score: 23 (Supported · #114/144)
- Kimi K3 public-lane score: 61.4 (Supported · #18/144)

| Benchmark | Grok 4.20 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 74.2% | Coming soon | Coming soon |
| SWE-bench Verified | 76.7% | Coming soon | Coming soon |
| SWE-bench Pro | 51.8% | Coming soon | Coming soon |
| Vibe Code Bench | 4.06% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 84.3% | 87.2% | Kimi K3 |
| SWE-bench (Vals) | 72.2% | 93.4% | Kimi K3 |
| DeepSWE | Coming soon | 67.5% | Coming soon |
| CursorBench 3.2 | Coming soon | 60.8% | Coming soon |
| FrontierSWE | Coming soon | 81.2% | Coming soon |
| ProgramBench | Coming soon | 77.8% | Coming soon |
| Kimi Code Bench v2 | Coming soon | 72.9% | Coming soon |
| sweMarathon | Coming soon | 42% | Coming soon |
| PostTrain Bench | Coming soon | 36.6% | Coming soon |
| MLS-Bench Lite | Coming soon | 48.3% | Coming soon |
| VulcanBench v3 | Coming soon | 73.7% | Coming soon |
| OpenHarmony Bench | Coming soon | 57.3% | Coming soon |
| FrontierSWE v2 | Coming soon | 25.9% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 32.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- Grok 4.20 public-lane score: 41.1 (Unranked · 2 rankable rows)
- Kimi K3 public-lane score: 65.8 (#18/27)

| Benchmark | Grok 4.20 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 53.3% | 60.4% | Kimi K3 |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |
| ARC-AGI-1 | Coming soon | 94.50% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Grok 4.20 public-lane score: 35.6 (#44/49)
- Kimi K3 public-lane score: 89.4 (#1/49)

| Benchmark | Grok 4.20 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 75.2% | 81.6% | Kimi K3 |
| CharXiv | 60.9% | 91.3% | Kimi K3 |
| ERQA | 54.1% | Coming soon | Coming soon |
| SimpleVQA | 57.4% | Coming soon | Coming soon |
| MedXpertQA (MM) | 65.8% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 63.3% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 83.4% | Coming soon |
| CharXiv w/o tools | Coming soon | 84.8% | Coming soon |
| MathVision | Coming soon | 94.3% | Coming soon |
| MathVision w/ Python | Coming soon | 97.8% | Coming soon |
| BabyVision w/ Python | Coming soon | 85.7% | Coming soon |
| ZeroBench | Coming soon | 23.0% | Coming soon |
| ZeroBench w/ Python | Coming soon | 41.0% | Coming soon |
| WorldVQA ForceAnswer | Coming soon | 51.0% | Coming soon |
| OmniDocBench | Coming soon | 91.1% | Coming soon |
| PerceptionBench | Coming soon | 58.5% | Coming soon |

### Knowledge

- Winner: Kimi K3
- Grok 4.20 public-lane score: 50.2 (Supported · #64/171)
- Kimi K3 public-lane score: 67.9 (Supported · #18/171)

| Benchmark | Grok 4.20 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 88.5% | 93.5% | Kimi K3 |
| HLE w/o tools | 31.6% | 43.5% | Kimi K3 |
| HealthBench Hard | 20.3% | Coming soon | Coming soon |
| MedXpertQA (Text) | 50.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.6% | 92.9% | Kimi K3 |
| MMLU-Pro (Vals) | 86.3% | 88.0% | Kimi K3 |
| GPQA | Coming soon | 93.5% | Coming soon |
| HLE | Coming soon | 56% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Grok 4.20 public-lane score: Coming soon
- Kimi K3 public-lane score: Coming soon

| Benchmark | Grok 4.20 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 52.7% | Coming soon |

## FAQ

### Which is better overall, Grok 4.20 or Kimi K3?

Kimi K3 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 K3?

The widest category gap is in multimodal & grounded, where the averages are 35.6 for Grok 4.20 and 89.4 for Kimi K3.

### 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 K3 cover on BenchLM?

Kimi K3 currently has 48 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 K3 vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-kimi-k3)
- [Grok 4.20 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-20-beta)
- [Kimi K3 vs GPT-6 Astra](/compare/gpt-6-astra-vs-kimi-k3)

## Explore More

- [Grok 4.20 profile](/models/grok-4-20-beta)
- [Kimi K3 profile](/models/kimi-k3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)