Model comparison
Kimi K2.5 Instant vs Mistral Small 3.1
Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 31.4 on the Noometry Index.
Last verified . 17 shared benchmarks.
Mistral AISummary
- They share 17 benchmarks with published results for both. Kimi K2.5 Instant scores higher in 9 categories and Mistral Small 3.1 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2.5 Instant leads 60.8 to 37.2.
Side by side
| Kimi K2.5 Instant | Mistral Small 3.1 | |
|---|---|---|
| Provider | Moonshot AI | Mistral AI |
| Noometry Index | 42.9 | 31.4 |
| Released | — | 2025-03-17 |
| Weights | Open | Open |
| Context window | — | 128K |
| Max output | — | 102K |
| Input $ / M tokens | — | $0.35 |
| Output $ / M tokens | — | $0.56 |
| Results tracked | 18 | 28 |
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Category by category
Coding Kimi K2.5 Instant leads
Kimi K2.5 Instant: 42.3 (#95), Mistral Small 3.1: 37.7 (#175)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Coding | 1483 | 1309 |
| LMArena WebDev | 1404 | — |
Reasoning Kimi K2.5 Instant leads
Kimi K2.5 Instant: 28.5 (#88), Mistral Small 3.1: 18.9 (#249)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1278 |
| Chess Puzzles | — | 1% |
| Epoch Capabilities Index | — | 127.48 |
Math Kimi K2.5 Instant leads
Kimi K2.5 Instant: 36.6 (#105), Mistral Small 3.1: 13.7 (#295)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Math | 1443 | 1261 |
| OTIS Mock AIME 2024-2025 | — | 3.9% |
| Omni-MATH | — | 24.8% |
Knowledge Kimi K2.5 Instant leads
Kimi K2.5 Instant: 39.5 (#121), Mistral Small 3.1: 22.6 (#266)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Expert | 1438 | 1258 |
| GPQA Diamond | — | 41.9% |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |
Multimodal Kimi K2.5 Instant leads
Kimi K2.5 Instant: 39.5 (#47), Mistral Small 3.1: 32.6 (#93)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | 1254 | 1136 |
Multilingual Kimi K2.5 Instant leads
Kimi K2.5 Instant: 52.2 (#89), Mistral Small 3.1: 41.4 (#204)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | 1406 | 1255 |
| LMArena Chinese | 1450 | 1254 |
| LMArena French | 1403 | 1270 |
| LMArena German | 1413 | 1266 |
| LMArena Korean | 1378 | 1206 |
| LMArena Russian | 1404 | 1263 |
| LMArena Spanish | 1448 | 1283 |
| LMArena Japanese | — | 1210 |
Instruction Following Kimi K2.5 Instant leads
Kimi K2.5 Instant: 75.5 (#61), Mistral Small 3.1: 63.8 (#225)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Instruction Following | 1430 | 1264 |
| IFEval | — | 75% |
Long Context Kimi K2.5 Instant leads
Kimi K2.5 Instant: 43.8 (#82), Mistral Small 3.1: 39.5 (#172)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | 1435 | 1300 |
Writing & Preference Kimi K2.5 Instant leads
Kimi K2.5 Instant: 60.8 (#91), Mistral Small 3.1: 37.2 (#254)
| Benchmark | Kimi K2.5 Instant | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | 1420 | 1278 |
| LMArena Creative Writing | 1379 | 1253 |
| LMArena Multi-Turn | 1427 | 1270 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |
Frequently asked questions
Is Kimi K2.5 Instant better than Mistral Small 3.1?
Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 31.4 on the Noometry Index.
Is Kimi K2.5 Instant or Mistral Small 3.1 better for coding?
Kimi K2.5 Instant scores higher on coding benchmarks: 42.3 versus 37.7 in the Noometry coding category.
How many benchmarks do Kimi K2.5 Instant and Mistral Small 3.1 share?
17 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and Mistral Small 3.1 has 28.