Model comparison
Gemini 3 Pro vs Step 5 Preview
Gemini 3 Pro is the stronger model overall, scoring 54.8 to 47.9 on the Noometry Index.
Last verified . 17 shared benchmarks.
Google
StepFunSummary
- They share 17 benchmarks with published results for both. Gemini 3 Pro scores higher in 7 categories and Step 5 Preview in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Gemini 3 Pro leads 64.4 to 41.2.
- The biggest single-benchmark swing is ProofBench: 20% for Gemini 3 Pro and 42% for Step 5 Preview.
Side by side
| Gemini 3 Pro | Step 5 Preview | |
|---|---|---|
| Provider | StepFun | |
| Noometry Index | 54.8 | 47.9 |
| Released | 2025-11-18 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 67 | 18 |
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Category by category
Coding Too close to call
Gemini 3 Pro: 51.6 (#39), Step 5 Preview: 51.8 (#36)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1440 | 1564 |
| LMArena Coding | 1481 | 1480 |
| SWE-bench Verified | 72.9% | — |
| SWE-bench Verified (bash only) | 74.2% | — |
| SWE-bench Multilingual | 68.7% | — |
| SciCode | — | 58.9% |
| GSO | 18.6% | — |
| WeirdML | 69.9% | — |
| ALE-Bench | 1,177 | — |
| AlgoTune | 1.83 | — |
Agentic & Tool Use Not comparable
Gemini 3 Pro: 40.6 (#23), Step 5 Preview: —
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| Terminal-Bench | 69.4% | — |
| Berkeley Function Calling Leaderboard | 72.5% | — |
| GDPval | 40.3% | — |
| Remote Labor Index | 1.3% | — |
| τ²-bench Airline | 80.5% | — |
| τ²-bench Banking | 18% | — |
| τ²-bench Retail | 75.9% | — |
| τ²-bench Telecom | 91% | — |
| DeepResearch Bench | 46.3% | — |
| BALROG | 58.1% | — |
| LMArena Search | 1207 | — |
| METR Time Horizons | 71% | — |
| Vending-Bench 2 | 5,478 | — |
Reasoning Gemini 3 Pro leads
Gemini 3 Pro: 52.5 (#31), Step 5 Preview: 40.0 (#57)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| CritPt | 6.9% | 20.9% |
| LMArena Hard Prompts | 1480 | 1465 |
| ARC-AGI-2 | 31.1% | — |
| SimpleBench | 76.4% | — |
| Kagi LLM Benchmark | 80.1% | — |
| NYT Connections (extended) | 94.4% | — |
| ARC-AGI-1 | 75% | — |
| Chess Puzzles | 31% | — |
| EnigmaEval | 18.2% | — |
| Epoch Capabilities Index | 152.92 | — |
| ForecastBench | 61.2 | — |
Math Gemini 3 Pro leads
Gemini 3 Pro: 49.9 (#59), Step 5 Preview: 46.1 (#72)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| ProofBench | 20% | 42% |
| LMArena Math | 1476 | 1470 |
| MathArena Final-Answer Competitions | 67% | — |
| OTIS Mock AIME 2024-2025 | 91.4% | — |
| Omni-MATH | 55.5% | — |
| FrontierMath (Feb 2025 set) | 37.6% | — |
| FrontierMath Tier 4 (v1) | 18.8% | — |
Knowledge Gemini 3 Pro leads
Gemini 3 Pro: 64.4 (#16), Step 5 Preview: 41.2 (#112)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1475 | 1470 |
| GPQA Diamond | 92.6% | — |
| Humanity's Last Exam | 37.5% | — |
| MMLU-Pro | 90.3% | — |
| Vectara Hallucination Rate | 13.6% | — |
| GPQA (HELM) | 80.3% | — |
Multimodal Gemini 3 Pro leads
Gemini 3 Pro: 57.6 (#2), Step 5 Preview: 41.0 (#41)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| LMArena Vision | 1305 | 1267 |
| GeoBench | 84% | — |
| VPCT | 91% | — |
| LMArena Document | 1434 | — |
Multilingual Gemini 3 Pro leads
Gemini 3 Pro: 56.9 (#16), Step 5 Preview: 53.8 (#54)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1474 | 1432 |
| LMArena Chinese | 1523 | 1519 |
| LMArena Russian | 1493 | 1436 |
| LMArena Spanish | 1470 | 1439 |
| LMArena French | 1492 | — |
| LMArena German | 1515 | — |
| LMArena Japanese | 1510 | — |
| LMArena Korean | 1448 | — |
Instruction Following Too close to call
Gemini 3 Pro: 76.3 (#45), Step 5 Preview: 76.0 (#50)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1458 | 1444 |
| IFEval | 87.7% | — |
Long Context Too close to call
Gemini 3 Pro: 44.0 (#79), Step 5 Preview: 44.5 (#64)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1471 | 1455 |
| CL-bench | 15.8% | — |
Writing & Preference Gemini 3 Pro leads
Gemini 3 Pro: 66.4 (#35), Step 5 Preview: 62.8 (#71)
| Benchmark | Gemini 3 Pro | Step 5 Preview |
|---|---|---|
| LMArena Text | 1479 | 1442 |
| LMArena Creative Writing | 1482 | 1410 |
| LMArena Multi-Turn | 1484 | 1447 |
| EQ-Bench Creative Writing | 1525 | — |
| WildBench | 85.9% | — |
Frequently asked questions
Is Gemini 3 Pro better than Step 5 Preview?
Gemini 3 Pro is the stronger model overall, scoring 54.8 to 47.9 on the Noometry Index.
Is Gemini 3 Pro or Step 5 Preview better for coding?
They score almost the same on coding (51.6 vs 51.8); test both on your own repository before choosing.
How many benchmarks do Gemini 3 Pro and Step 5 Preview share?
17 benchmarks have published results for both models. Gemini 3 Pro has 67 scored results on Noometry and Step 5 Preview has 18.