Model comparison
Kimi K2.5 vs Magistral Small
Kimi K2.5 is the stronger model overall, scoring 48.1 to 30.2 on the Noometry Index.
Last verified . 9 shared benchmarks.
Mistral AISummary
- They share 9 benchmarks with published results for both. Kimi K2.5 scores higher in 4 categories and Magistral Small in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K2.5 leads 51.8 to 26.2.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 78.5% for Kimi K2.5 and 6.3% for Magistral Small.
- Magistral Small is cheaper at $0.50 / $1.50 per million input/output tokens, against $0.45 / $2.25 for Kimi K2.5.
- Kimi K2.5 accepts more context: 262K tokens versus 128K.
Side by side
| Kimi K2.5 | Magistral Small | |
|---|---|---|
| Provider | Moonshot AI | Mistral AI |
| Noometry Index | 48.1 | 30.2 |
| Released | 2026-01-27 | 2025-06-10 |
| Weights | Open | Open |
| Context window | 262K | 128K |
| Max output | 262K | 40K |
| Input $ / M tokens | $0.45 | $0.50 |
| Output $ / M tokens | $2.25 | $1.50 |
| Results tracked | 51 | 10 |
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Category by category
Coding Kimi K2.5 leads
Kimi K2.5: 48.8 (#53), Magistral Small: 38.4 (#176)
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| SciCode | 49% | 35.2% |
| SWE-bench Verified | 73.8% | — |
| SWE-bench Verified (bash only) | 70.8% | — |
| LMArena WebDev | 1437 | — |
| SWE-bench Multilingual | 67.3% | — |
| WeirdML | 45.6% | — |
| LMArena Coding | 1474 | — |
| ALE-Bench | 821.65 | — |
Agentic & Tool Use Not comparable
Kimi K2.5: 34.2 (#48), Magistral Small: —
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| Terminal-Bench | 43.2% | — |
| OSWorld | 63.3% | — |
| Vending-Bench 2 | 1,198 | — |
Reasoning Kimi K2.5 leads
Kimi K2.5: 31.2 (#80), Magistral Small: 6.8 (#350)
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| ARC-AGI-2 | 11.8% | 0% |
| Kagi LLM Benchmark | 78.5% | 6.3% |
| ARC-AGI-1 | 65.3% | 5% |
| CritPt | 3.1% | 0.3% |
| Chess Puzzles | 12% | 3% |
| Epoch Capabilities Index | 148.03 | 133.19 |
| SimpleBench | 46.8% | — |
| NYT Connections (extended) | 69.9% | — |
| EnigmaEval | 3.4% | — |
| Thematic Generalization | 69.4% | — |
| LMArena Hard Prompts | 1453 | — |
| DTBench | — | 61.3% |
Math Kimi K2.5 leads
Kimi K2.5: 51.8 (#53), Magistral Small: 26.2 (#261)
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 92.2% | 30% |
| MathArena Final-Answer Competitions | 62.3% | — |
| LMArena Math | 1470 | — |
| FrontierMath (Feb 2025 set) | 27.9% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Kimi K2.5 leads
Kimi K2.5: 53.6 (#56), Magistral Small: 30.9 (#223)
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| GPQA Diamond | 87.6% | 56.1% |
| Humanity's Last Exam | 24.4% | — |
| SimpleQA Verified | 34.3% | — |
| Vectara Hallucination Rate | 14.2% | — |
| LMArena Expert | 1466 | — |
Multimodal Not comparable
Kimi K2.5: 41.1 (#39), Magistral Small: —
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| LMArena Vision | 1269 | — |
| LMArena Document | 1430 | — |
Multilingual Not comparable
Kimi K2.5: 53.9 (#53), Magistral Small: —
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| LMArena Non-English | 1433 | — |
| LMArena Chinese | 1495 | — |
| LMArena French | 1454 | — |
| LMArena German | 1441 | — |
| LMArena Japanese | 1421 | — |
| LMArena Korean | 1410 | — |
| LMArena Russian | 1435 | — |
| LMArena Spanish | 1450 | — |
Instruction Following Not comparable
Kimi K2.5: 75.3 (#64), Magistral Small: —
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| LMArena Instruction Following | 1431 | — |
Long Context Not comparable
Kimi K2.5: 52.1 (#7), Magistral Small: —
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| Fiction.LiveBench | 86.1% | — |
| CL-bench | 19.3% | — |
| CL-bench Life | 13.2% | — |
| LMArena Longer Query | 1445 | — |
Writing & Preference Not comparable
Kimi K2.5: 65.1 (#53), Magistral Small: —
| Benchmark | Kimi K2.5 | Magistral Small |
|---|---|---|
| LMArena Text | 1445 | — |
| LMArena Creative Writing | 1423 | — |
| EQ-Bench Creative Writing | 1579 | — |
| LMArena Multi-Turn | 1444 | — |
Frequently asked questions
Is Kimi K2.5 better than Magistral Small?
Kimi K2.5 is the stronger model overall, scoring 48.1 to 30.2 on the Noometry Index.
Which is cheaper, Kimi K2.5 or Magistral Small?
Magistral Small is cheaper. It lists at $0.50 per million input tokens and $1.50 per million output tokens; Kimi K2.5 lists at $0.45 and $2.25.
Is Kimi K2.5 or Magistral Small better for coding?
Kimi K2.5 scores higher on coding benchmarks: 48.8 versus 38.4 in the Noometry coding category.
Which has the bigger context window?
Kimi K2.5 does, with 262K tokens against 128K.
How many benchmarks do Kimi K2.5 and Magistral Small share?
9 benchmarks have published results for both models. Kimi K2.5 has 51 scored results on Noometry and Magistral Small has 10.