# Grok 4 vs Kimi K2.5

> Side-by-side benchmark comparison for Grok 4 and Kimi K2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-vs-kimi-k2-5
- Last updated: September 23, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.6

## Quick Verdict

Pick Kimi K2.5 if you want the stronger benchmark profile. Grok 4 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Kimi K2.5 leads overall 53.79 to 52.71.
- The clearest category separation is in mathematics, where the averages are 38.3 for Grok 4 and 62.1 for Kimi K2.5.
- The biggest single benchmark swing is FrontierMath v2 (Tiers 1-3) in Mathematics, with scores of 19.655% and 27.900%.
- Grok 4 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Kimi K2.5 also has the larger context window at 256K.

## Model Snapshot

| Property | Grok 4 | Kimi K2.5 |
|----------|----------|----------|
| Creator | xAI | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 128K | 256K |
| Overall Score | 52.71 | 53.79 |
| Benchmarks Covered | 4 | 45 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.60 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Grok 4 public-lane score: Coming soon
- Kimi K2.5 public-lane score: 35.5 (Estimated · #54/105)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 42.34% | 45.88% | Kimi K2.5 |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| BrowseComp | Coming soon | 60.6% | Coming soon |
| Claw-Eval | Coming soon | 52.3% | Coming soon |
| QwenClawBench | Coming soon | 54.3% | Coming soon |
| τ³-bench results | Coming soon | 65.7% | Coming soon |
| DeepSearchQA | Coming soon | 77.1% | Coming soon |
| DeepPlanning | Coming soon | 14.4% | Coming soon |
| Toolathlon | Coming soon | 27.8% | Coming soon |
| MCP Atlas | Coming soon | 29.5% | Coming soon |
| MCP-Tasks | Coming soon | 59.1% | Coming soon |
| WideResearch | Coming soon | 72.7% | Coming soon |
| ResearchClawBench | Coming soon | 14.0% | Coming soon |
| JobBench | Coming soon | 8.7% | Coming soon |

### Coding

- Winner: Not comparable
- Grok 4 public-lane score: Coming soon
- Kimi K2.5 public-lane score: 40.9 (Estimated · #58/135)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| React Native Evals | 72.6% | 77.2% | Kimi K2.5 |
| SWE-bench Verified | Coming soon | 76.8% | Coming soon |
| SWE-bench Verified* | Coming soon | 70.8% | Coming soon |
| LiveCodeBench v6 | Coming soon | 85.0% | Coming soon |
| SWE-bench Pro | Coming soon | 50.7% | Coming soon |
| SWE Multilingual | Coming soon | 73% | Coming soon |
| SWE-Rebench | Coming soon | 58.5% | Coming soon |
| SciCode | Coming soon | 48.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Grok 4 public-lane score: 67.7 (Unranked · 2 rankable rows)
- Kimi K2.5 public-lane score: 54.1 (Unranked · 3 rankable rows)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | Coming soon | 61% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Grok 4 public-lane score: 61.4 (Unranked · 1 rankable row)
- Kimi K2.5 public-lane score: 65.8 (#25/50)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 78.5% | Coming soon |
| Video-MME | Coming soon | 87.4% | Coming soon |
| MMVU | Coming soon | 80.4% | Coming soon |
| VideoMMMU | Coming soon | 86.6% | Coming soon |

### Knowledge

- Winner: Directional only
- Grok 4 public-lane score: 48.1 (Estimated · #61/160)
- Kimi K2.5 public-lane score: 46.4 (Estimated · #68/160)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87.6% | Coming soon |
| GPQA-D | Coming soon | 87.6% | Coming soon |
| SuperGPQA | Coming soon | 69.2% | Coming soon |
| MMLU-Pro | Coming soon | 87.1% | Coming soon |
| MMLU-Pro (Arcee) | Coming soon | 87.1% | Coming soon |
| HLE | Coming soon | 30.1% | Coming soon |

### Multilingual

- Winner: Not comparable
- Grok 4 public-lane score: Coming soon
- Kimi K2.5 public-lane score: 38.2 (#8/12)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 82.3% | Coming soon |
| NOVA-63 | Coming soon | 56.0% | Coming soon |

### Instruction Following

- Winner: Directional only
- Grok 4 public-lane score: 62.9 (#71/124)
- Kimi K2.5 public-lane score: 84.4 (#41/124)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 93.9% | Coming soon |

### Mathematics

- Winner: Not comparable
- Grok 4 public-lane score: 38.3 (Unranked · 2 rankable rows)
- Kimi K2.5 public-lane score: 62.1 (#4/7)

| Benchmark | Grok 4 | Kimi K2.5 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 19.655% | 27.900% | Kimi K2.5 |
| FrontierMath v2 (Tier 4) | 2.083% | 4.200% | Kimi K2.5 |
| AIME 2025 | Coming soon | 96.1% | Coming soon |
| AIME26 | Coming soon | 95.8% | Coming soon |
| AIME25 (Arcee) | Coming soon | 96.3% | Coming soon |
| HMMT Feb 2025 | Coming soon | 95.4% | Coming soon |
| HMMT Nov 2025 | Coming soon | 91.1% | Coming soon |
| HMMT Feb 2026 | Coming soon | 87.1% | Coming soon |
| MMAnswerBench | Coming soon | 81.8% | Coming soon |

## FAQ

### Which is better overall, Grok 4 or Kimi K2.5?

Kimi K2.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Grok 4 and Kimi K2.5?

The widest category gap is in mathematics, where the averages are 38.3 for Grok 4 and 62.1 for Kimi K2.5.

### How many benchmarks does Grok 4 cover on BenchLM?

Grok 4 currently has 4 sourced benchmark scores on BenchLM.

### How many benchmarks does Kimi K2.5 cover on BenchLM?

Kimi K2.5 currently has 45 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Grok 4 vs Kimi K2.5 (Reasoning)](/compare/grok-4-vs-kimi-k2-5-reasoning)
- [Kimi K2.5 vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)
- [Grok 4 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4)
- [Kimi K2.5 vs GPT-6 Astra](/compare/gpt-6-astra-vs-kimi-k2-5)

## Explore More

- [Grok 4 profile](/models/grok-4)
- [Kimi K2.5 profile](/models/kimi-k2-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)