Model comparison
Kimi K3 vs Step 1o Turbo 202506
Kimi K3 is the stronger model overall, scoring 59.5 to 39.7 on the Noometry Index.
Last verified . 13 shared benchmarks.
StepFunSummary
- They share 13 benchmarks with published results for both. Kimi K3 scores higher in 9 categories and Step 1o Turbo 202506 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K3 leads 74.2 to 36.6.
- Kimi K3 has downloadable open weights; the other is API-only.
Side by side
| Kimi K3 | Step 1o Turbo 202506 | |
|---|---|---|
| Provider | Moonshot AI | StepFun |
| Noometry Index | 59.5 | 39.7 |
| Released | 2026-07-16 | — |
| Weights | Open | Proprietary |
| Context window | 1.05M | — |
| Max output | 1.05M | — |
| Input $ / M tokens | $3 | — |
| Output $ / M tokens | $15 | — |
| Results tracked | 53 | 14 |
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Category by category
Coding Kimi K3 leads
Kimi K3: 61.0 (#10), Step 1o Turbo 202506: 39.2 (#160)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Coding | 1508 | 1339 |
| DeepSWE | 68.5% | — |
| FrontierCode | 44.2% | — |
| LMArena WebDev | 1654 | — |
| FrontierSWE | 25.9% | — |
| SciCode | 59.5% | — |
| WeirdML | 82.6% | — |
| ALE-Bench | 1,524 | — |
Agentic & Tool Use Not comparable
Kimi K3: 41.8 (#20), Step 1o Turbo 202506: —
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| APEX-Agents | 50.6% | — |
| τ²-bench Banking | 37.1% | — |
| PostTrainBench | 32% | — |
| GBAEval | 48.3% | — |
| GDP.pdf | 19% | — |
| Vending-Bench 2 | 5,165 | — |
Reasoning Kimi K3 leads
Kimi K3: 63.0 (#17), Step 1o Turbo 202506: 26.8 (#129)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Hard Prompts | 1496 | 1335 |
| ARC-AGI-2 | 60.4% | — |
| SimpleBench | 60.7% | — |
| NYT Connections (extended) | 93.6% | — |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 23.4% | — |
| Chess Puzzles | 39% | — |
| Mystery Game Puzzles | 26% | — |
| DTBench | 91.2% | — |
| LMCA | 52.7% | — |
| Surface Evolver Bench | 95% | — |
| Epoch Capabilities Index | 157.45 | — |
| ForecastBench | 61.1 | — |
Math Kimi K3 leads
Kimi K3: 74.2 (#16), Step 1o Turbo 202506: 36.6 (#164)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Math | 1491 | 1318 |
| FrontierMath (Tiers 1-3) | 72.2% | — |
| FrontierMath Tier 4 | 39% | — |
| MathArena Final-Answer Competitions | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 97.2% | — |
| ProofBench | 87% | — |
Knowledge Kimi K3 leads
Kimi K3: 63.2 (#21), Step 1o Turbo 202506: 36.1 (#176)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Expert | 1521 | 1308 |
| GPQA Diamond | 93.1% | — |
| SimpleQA Verified | 50.6% | — |
Multimodal Kimi K3 leads
Kimi K3: 37.8 (#70), Step 1o Turbo 202506: 36.1 (#80)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Vision | — | 1186 |
| Blueprint-Bench 2 | 29.5% | — |
| Furniture Assembly | 34.2% | — |
Multilingual Kimi K3 leads
Kimi K3: 56.3 (#21), Step 1o Turbo 202506: 45.3 (#173)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Non-English | 1466 | 1313 |
| LMArena Chinese | 1529 | 1380 |
| LMArena German | 1488 | 1314 |
| LMArena Russian | 1482 | 1327 |
| LMArena French | 1491 | — |
| LMArena Japanese | 1487 | — |
| LMArena Korean | 1458 | — |
| LMArena Spanish | 1472 | — |
Instruction Following Kimi K3 leads
Kimi K3: 77.7 (#14), Step 1o Turbo 202506: 69.2 (#176)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Instruction Following | 1483 | 1310 |
Long Context Kimi K3 leads
Kimi K3: 45.8 (#29), Step 1o Turbo 202506: 41.0 (#146)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Longer Query | 1494 | 1348 |
Writing & Preference Kimi K3 leads
Kimi K3: 76.6 (#4), Step 1o Turbo 202506: 53.1 (#160)
| Benchmark | Kimi K3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Text | 1476 | 1336 |
| LMArena Creative Writing | 1454 | 1307 |
| LMArena Multi-Turn | 1488 | 1340 |
| EQ-Bench Creative Writing | 2082 | — |
| EQ-Bench 4 | 1339 | — |
Frequently asked questions
Is Kimi K3 better than Step 1o Turbo 202506?
Kimi K3 is the stronger model overall, scoring 59.5 to 39.7 on the Noometry Index.
Is Kimi K3 or Step 1o Turbo 202506 better for coding?
Kimi K3 scores higher on coding benchmarks: 61.0 versus 39.2 in the Noometry coding category.
How many benchmarks do Kimi K3 and Step 1o Turbo 202506 share?
13 benchmarks have published results for both models. Kimi K3 has 53 scored results on Noometry and Step 1o Turbo 202506 has 14.