# Gemma 4 31B vs Kimi K2.5 (Reasoning)

> Side-by-side benchmark comparison for Gemma 4 31B and Kimi K2.5 (Reasoning) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemma-4-31b-vs-kimi-k2-5-reasoning
- Last updated: October 17, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Kimi K2.5 (Reasoning) leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Kimi K2.5 (Reasoning) has the higher overall point estimate 56.09 to 39.89. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 19.7 for Gemma 4 31B and 38.3 for Kimi K2.5 (Reasoning).
- The biggest single benchmark swing is LiveCodeBench v6 in Coding, with scores of 80.0% and 85.0%.
- Gemma 4 31B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemma 4 31B also has the larger context window at 256K.

## Model Snapshot

| Property | Gemma 4 31B | Kimi K2.5 (Reasoning) |
|----------|----------|----------|
| Creator | Google | Moonshot AI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 128K |
| Overall Score | 39.89 | 56.09 |
| Benchmarks Covered | 10 | 15 |
| Pricing (input/output) | $0.00 / $0.00 | $0.60 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Gemma 4 31B public-lane score: 19.7 (Estimated · #109/128)
- Kimi K2.5 (Reasoning) public-lane score: 38.3 (Estimated · #71/128)

| Benchmark | Gemma 4 31B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 35.26% | 32.58% | Gemma 4 31B |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| BrowseComp | Coming soon | 60.6% | Coming soon |
| OSWorld-Verified | Coming soon | 63.3% | Coming soon |

### Coding

- Winner: Not comparable
- Gemma 4 31B public-lane score: 31.7 (Supported · #89/150)
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Gemma 4 31B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 80.0% | 85.0% | Kimi K2.5 (Reasoning) |
| SWE-Rebench | 41.6% | Coming soon | Coming soon |
| React Native Evals | 75.2% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 76.8% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| Vibe Code Bench | Coming soon | 17.54% | Coming soon |

### Reasoning

- Winner: Not comparable
- Gemma 4 31B public-lane score: 66.6 (Unranked · 3 rankable rows)
- Kimi K2.5 (Reasoning) public-lane score: 67.1 (Unranked · 1 rankable row)

| Benchmark | Gemma 4 31B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | 66.4% | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 61% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Gemma 4 31B public-lane score: 74.3 (#26/54)
- Kimi K2.5 (Reasoning) public-lane score: 69 (#33/54)

| Benchmark | Gemma 4 31B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.9% | 78.5% | Kimi K2.5 (Reasoning) |
| CharXiv | Coming soon | 77.5% | Coming soon |

### Knowledge

- Winner: Directional only
- Gemma 4 31B public-lane score: 40.9 (Supported · #114/184)
- Kimi K2.5 (Reasoning) public-lane score: 48.8 (Estimated · #85/184)

| Benchmark | Gemma 4 31B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 84.3% | 87.6% | Kimi K2.5 (Reasoning) |
| MMLU-Pro | 85.2% | 87.1% | Kimi K2.5 (Reasoning) |
| HLE | 26.5% | Coming soon | Coming soon |
| HLE w/o tools | 19.5% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Gemma 4 31B public-lane score: 92.9 (#15/148)
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- Gemma 4 31B public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Gemma 4 31B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 96.1% | Coming soon |
| HMMT Feb 2025 | Coming soon | 95.4% | Coming soon |

## FAQ

### Which is better overall, Gemma 4 31B or Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Gemma 4 31B and Kimi K2.5 (Reasoning)?

The widest category gap is in agentic, where the averages are 19.7 for Gemma 4 31B and 38.3 for Kimi K2.5 (Reasoning).

### How many benchmarks does Gemma 4 31B cover on BenchLM?

Gemma 4 31B currently has 10 sourced benchmark scores on BenchLM.

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

Kimi K2.5 (Reasoning) currently has 15 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemma 4 31B vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-gemma-4-31b)
- [Kimi K2.5 (Reasoning) vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-kimi-k2-5-reasoning)
- [Gemma 4 31B vs Gemma 4 12B](/compare/gemma-4-12b-vs-gemma-4-31b)
- [Kimi K2.5 (Reasoning) vs Gemma 4 12B](/compare/gemma-4-12b-vs-kimi-k2-5-reasoning)

## Explore More

- [Gemma 4 31B profile](/models/gemma-4-31b)
- [Kimi K2.5 (Reasoning) profile](/models/kimi-k2-5-reasoning)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)