# Kimi K2.5 vs Mistral Medium

> Kimi K2.5 is the stronger model overall, scoring 48.1 to 36.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/kimi-k2-5-vs-mistral-medium
- Last updated: 2026-10-11
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Kimi K2.5 scores higher in 10 categories and Mistral Medium in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Kimi K2.5 leads 53.6 to 25.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 92.2% for Kimi K2.5 and 32.2% for Mistral Medium.
- Kimi K2.5 is cheaper at $0.45 / $2.25 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium.

## Snapshot

| | Kimi K2.5 | Mistral Medium |
|---|---|---|
| Provider | Moonshot AI | Mistral AI |
| Noometry Index | 48.1 | 36.3 |
| Rank | 57 | 218 |
| Context | 262K | 262K |
| Input $/M | $0.45 | $1.50 |
| Output $/M | $2.25 | $7.50 |
| Weights | Open | Open |

## Coding

- Kimi K2.5: 48.8 (#53)
- Mistral Medium: 34.2 (#243)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| SciCode | 49% | 40.2% |
| WeirdML | 45.6% | 43.7% |
| LMArena Coding | 1474 | 1434 |
| ALE-Bench | 821.65 | 763.98 |
| SWE-bench Verified | 73.8% | — |
| FrontierCode | — | 8% |
| SWE-bench Verified (bash only) | 70.8% | — |
| LMArena WebDev | 1437 | — |
| SWE-bench Multilingual | 67.3% | — |

## Agentic & Tool Use

- Kimi K2.5: 34.2 (#48)
- Mistral Medium: 28.3 (#90)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| Terminal-Bench | 43.2% | — |
| Berkeley Function Calling Leaderboard | — | 37.7% |
| OSWorld | 63.3% | — |
| Vending-Bench 2 | 1,198 | — |

## Reasoning

- Kimi K2.5: 31.2 (#80)
- Mistral Medium: 24.0 (#167)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| Kagi LLM Benchmark | 78.5% | 50% |
| CritPt | 3.1% | 0% |
| LMArena Hard Prompts | 1453 | 1426 |
| ARC-AGI-2 | 11.8% | — |
| SimpleBench | 46.8% | — |
| NYT Connections (extended) | 69.9% | — |
| ARC-AGI-1 | 65.3% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 3.4% | — |
| Thematic Generalization | 69.4% | — |
| DTBench | — | 75.5% |
| LMCA | — | 26.1% |
| Surface Evolver Bench | — | 26.9% |
| Epoch Capabilities Index | 148.03 | — |

## Math

- Kimi K2.5: 51.8 (#53)
- Mistral Medium: 28.1 (#245)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 92.2% | 32.2% |
| LMArena Math | 1470 | 1408 |
| FrontierMath (Feb 2025 set) | 27.9% | 0.3% |
| MathArena Final-Answer Competitions | 62.3% | — |
| ProofBench | — | 9% |
| MATH Level 5 | — | 81.6% |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Kimi K2.5: 53.6 (#56)
- Mistral Medium: 25.0 (#265)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| GPQA Diamond | 87.6% | 59.5% |
| Humanity's Last Exam | 24.4% | 4.5% |
| Vectara Hallucination Rate | 14.2% | 22.7% |
| LMArena Expert | 1466 | 1408 |
| SimpleQA Verified | 34.3% | — |

## Multimodal

- Kimi K2.5: 41.1 (#39)
- Mistral Medium: 35.3 (#88)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| LMArena Vision | 1269 | 1172 |
| LMArena Document | 1430 | — |

## Multilingual

- Kimi K2.5: 53.9 (#53)
- Mistral Medium: 52.1 (#91)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| LMArena Non-English | 1433 | 1408 |
| LMArena Chinese | 1495 | 1447 |
| LMArena French | 1454 | 1459 |
| LMArena German | 1441 | 1432 |
| LMArena Japanese | 1421 | 1378 |
| LMArena Korean | 1410 | 1380 |
| LMArena Russian | 1435 | 1411 |
| LMArena Spanish | 1450 | 1433 |

## Instruction Following

- Kimi K2.5: 75.3 (#64)
- Mistral Medium: 73.7 (#116)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| LMArena Instruction Following | 1431 | 1398 |

## Long Context

- Kimi K2.5: 52.1 (#7)
- Mistral Medium: 42.9 (#114)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| LMArena Longer Query | 1445 | 1406 |
| Fiction.LiveBench | 86.1% | — |
| CL-bench | 19.3% | — |
| CL-bench Life | 13.2% | — |

## Writing & Preference

- Kimi K2.5: 65.1 (#53)
- Mistral Medium: 60.0 (#103)

| Benchmark | Kimi K2.5 | Mistral Medium |
|---|---|---|
| LMArena Text | 1445 | 1424 |
| LMArena Creative Writing | 1423 | 1391 |
| LMArena Multi-Turn | 1444 | 1418 |
| Short-Story Creative Writing | — | 77.3% |
| EQ-Bench Creative Writing | 1579 | — |

## FAQ

### Is Kimi K2.5 better than Mistral Medium?

Kimi K2.5 is the stronger model overall, scoring 48.1 to 36.3 on the Noometry Index.

### Which is cheaper, Kimi K2.5 or Mistral Medium?

Kimi K2.5 is cheaper. It lists at $0.45 per million input tokens and $2.25 per million output tokens; Mistral Medium lists at $1.50 and $7.50.

### Is Kimi K2.5 or Mistral Medium better for coding?

Kimi K2.5 scores higher on coding benchmarks: 48.8 versus 34.2 in the Noometry coding category.

### Which has the bigger context window?

Both accept 262K tokens.

### How many benchmarks do Kimi K2.5 and Mistral Medium share?

28 benchmarks have published results for both models. Kimi K2.5 has 51 scored results on Noometry and Mistral Medium has 36.