Model comparison
Gemini 3.1 Pro Preview vs Step 3
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 40.5 on the Noometry Index.
Last verified . 16 shared benchmarks.
Google
StepFunSummary
- They share 16 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 9 categories and Step 3 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 28.4.
- Step 3 has downloadable open weights; the other is API-only.
Side by side
| Gemini 3.1 Pro Preview | Step 3 | |
|---|---|---|
| Provider | StepFun | |
| Noometry Index | 56.7 | 40.5 |
| Released | 2026-02-19 | — |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $12 | — |
| Results tracked | 71 | 17 |
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Category by category
Coding Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 42.5 (#99), Step 3: 40.1 (#147)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Coding | 1484 | 1367 |
| SWE-bench Verified | 75.6% | — |
| DeepSWE | 11.7% | — |
| LMArena WebDev | 1447 | — |
| SciCode | 58.9% | — |
| GSO | 22.6% | — |
| WeirdML | 72.1% | — |
| MirrorCode | 8.9% | — |
| ALE-Bench | 1,161 | — |
| AlgoTune | 2.02 | — |
Agentic & Tool Use Not comparable
Gemini 3.1 Pro Preview: 37.7 (#34), Step 3: —
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| Terminal-Bench | 80.2% | — |
| APEX-Agents | 35.3% | — |
| τ²-bench Banking | 26% | — |
| DeepResearch Bench | 47.8% | — |
| PostTrainBench | 22% | — |
| BALROG | 57% | — |
| ExploitBench | 26.1% | — |
| GBAEval | 0.8% | — |
| GDP.pdf | 17% | — |
| LMArena Search | 1211 | — |
| METR Time Horizons | 77% | — |
| Vending-Bench 2 | 3,774 | — |
Reasoning Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 71.7 (#12), Step 3: 28.4 (#105)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Hard Prompts | 1485 | 1355 |
| ARC-AGI-2 | 77.1% | — |
| SimpleBench | 79.6% | — |
| Kagi LLM Benchmark | — | 62.3% |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | 98% | — |
| CritPt | 17.7% | — |
| Chess Puzzles | 55% | — |
| EnigmaEval | 36.8% | — |
| Thematic Generalization | 79.4% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 34% | — |
| DTBench | 97.1% | — |
| LMCA | 53.8% | — |
| Epoch Capabilities Index | 154.77 | — |
| ForecastBench | 59 | — |
Math Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 62.1 (#34), Step 3: 37.6 (#148)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Math | 1485 | 1366 |
| FrontierMath (Tiers 1-3) | 59.6% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 86.5% | — |
| OTIS Mock AIME 2024-2025 | 95.6% | — |
| ProofBench | 26% | — |
| FrontierMath (Feb 2025 set) | 36.9% | — |
| FrontierMath Tier 4 (v1) | 16.7% | — |
Knowledge Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 71.8 (#3), Step 3: 36.8 (#164)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Expert | 1485 | 1333 |
| GPQA Diamond | 94.4% | — |
| Humanity's Last Exam | 46.4% | — |
| SimpleQA Verified | 73.5% | — |
| Vectara Hallucination Rate | 10.4% | — |
Multimodal Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 37.9 (#69), Step 3: 35.5 (#86)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Vision | 1296 | 1177 |
| Blueprint-Bench 2 | 26.5% | — |
| Furniture Assembly | 26.7% | — |
| LMArena Document | 1444 | — |
Multilingual Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 57.0 (#12), Step 3: 46.3 (#159)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Non-English | 1477 | 1327 |
| LMArena Chinese | 1529 | 1397 |
| LMArena German | 1491 | 1371 |
| LMArena Korean | 1455 | 1269 |
| LMArena Russian | 1498 | 1331 |
| LMArena Spanish | 1479 | 1371 |
| LMArena French | 1487 | — |
| LMArena Japanese | 1493 | — |
Instruction Following Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 77.0 (#32), Step 3: 70.4 (#164)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Instruction Following | 1466 | 1332 |
Long Context Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 47.4 (#18), Step 3: 40.3 (#157)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Longer Query | 1483 | 1326 |
| CL-bench | 20.8% | — |
| CL-bench Life | 16.9% | — |
Writing & Preference Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 66.1 (#37), Step 3: 54.3 (#151)
| Benchmark | Gemini 3.1 Pro Preview | Step 3 |
|---|---|---|
| LMArena Text | 1481 | 1350 |
| LMArena Creative Writing | 1482 | 1321 |
| LMArena Multi-Turn | 1488 | 1341 |
| EQ-Bench Creative Writing | 1491 | — |
| EQ-Bench 4 | 1142 | — |
Frequently asked questions
Is Gemini 3.1 Pro Preview better than Step 3?
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 40.5 on the Noometry Index.
Is Gemini 3.1 Pro Preview or Step 3 better for coding?
Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.5 versus 40.1 in the Noometry coding category.
How many benchmarks do Gemini 3.1 Pro Preview and Step 3 share?
16 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Step 3 has 17.