Model comparison
Gemini 3 Pro vs GPT-6 Astra
GPT-6 Astra is the stronger model overall, scoring 70.8 to 54.8 on the Noometry Index.
Last verified . 38 shared benchmarks.
GoogleSummary
- They share 38 benchmarks with published results for both. Gemini 3 Pro scores higher in 2 categories and GPT-6 Astra in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-6 Astra leads 93.5 to 49.9.
- The biggest single-benchmark swing is ProofBench: 20% for Gemini 3 Pro and 99% for GPT-6 Astra.
Side by side
| Gemini 3 Pro | GPT-6 Astra | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 54.8 | 70.8 |
| Released | 2025-11-18 | 2026-09-03 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 128K |
| Input $ / M tokens | — | $10 |
| Output $ / M tokens | — | $50 |
| Results tracked | 67 | 56 |
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Category by category
Coding GPT-6 Astra leads
Gemini 3 Pro: 51.6 (#39), GPT-6 Astra: 73.7 (#2)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| LMArena WebDev | 1440 | 1786 |
| GSO | 18.6% | 79.4% |
| WeirdML | 69.9% | 93.6% |
| LMArena Coding | 1481 | 1487 |
| ALE-Bench | 1,177 | 2,951 |
| SWE-bench Verified | 72.9% | — |
| DeepSWE | — | 74.1% |
| FrontierCode | — | 53.3% |
| SWE-bench Verified (bash only) | 74.2% | — |
| SWE-bench Multilingual | 68.7% | — |
| FrontierSWE | — | 65.5% |
| SciCode | — | 56.5% |
| MirrorCode | — | 46.7% |
| AlgoTune | 1.83 | — |
Agentic & Tool Use GPT-6 Astra leads
Gemini 3 Pro: 40.6 (#23), GPT-6 Astra: 52.9 (#3)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| Remote Labor Index | 1.3% | 20.8% |
| BALROG | 58.1% | 68.3% |
| Vending-Bench 2 | 5,478 | 15,515 |
| Terminal-Bench | 69.4% | — |
| APEX-Agents | — | 64.7% |
| Berkeley Function Calling Leaderboard | 72.5% | — |
| GDPval | 40.3% | — |
| τ²-bench Airline | 80.5% | — |
| τ²-bench Banking | 18% | — |
| τ²-bench Retail | 75.9% | — |
| τ²-bench Telecom | 91% | — |
| DeepResearch Bench | 46.3% | — |
| GDP.pdf | — | 34.2% |
| LMArena Search | 1207 | — |
| METR Time Horizons | 71% | — |
Reasoning GPT-6 Astra leads
Gemini 3 Pro: 52.5 (#31), GPT-6 Astra: 85.1 (#1)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| ARC-AGI-2 | 31.1% | 95% |
| NYT Connections (extended) | 94.4% | 98.1% |
| ARC-AGI-1 | 75% | 98.5% |
| CritPt | 6.9% | 31.7% |
| Chess Puzzles | 31% | 72% |
| LMArena Hard Prompts | 1480 | 1462 |
| Epoch Capabilities Index | 152.92 | 166.45 |
| SimpleBench | 76.4% | — |
| Kagi LLM Benchmark | 80.1% | — |
| EnigmaEval | 18.2% | — |
| EBR-Bench | — | 76.2% |
| Mystery Game Puzzles | — | 84% |
| DTBench | — | 97.3% |
| LMCA | — | 64.4% |
| Bench to the Future 3 | — | 0.14 |
| ForecastBench | 61.2 | — |
Math GPT-6 Astra leads
Gemini 3 Pro: 49.9 (#59), GPT-6 Astra: 93.5 (#2)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 91.4% | 100% |
| ProofBench | 20% | 99% |
| LMArena Math | 1476 | 1465 |
| FrontierMath (Tiers 1-3) | — | 93.7% |
| FrontierMath Tier 4 | — | 97.6% |
| MathArena Final-Answer Competitions | 67% | — |
| Omni-MATH | 55.5% | — |
| FrontierMath (Feb 2025 set) | 37.6% | — |
| FrontierMath Erdős | — | 2.9% |
| FrontierMath Tier 4 (v1) | 18.8% | — |
Knowledge GPT-6 Astra leads
Gemini 3 Pro: 64.4 (#16), GPT-6 Astra: 75.3 (#1)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| GPQA Diamond | 92.6% | 95.8% |
| Humanity's Last Exam | 37.5% | 54.8% |
| Vectara Hallucination Rate | 13.6% | 8.7% |
| LMArena Expert | 1475 | 1483 |
| SimpleQA Verified | — | 75.6% |
| MMLU-Pro | 90.3% | — |
| GPQA (HELM) | 80.3% | — |
Multimodal Gemini 3 Pro leads
Gemini 3 Pro: 57.6 (#2), GPT-6 Astra: 55.0 (#3)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| LMArena Vision | 1305 | 1281 |
| LMArena Document | 1434 | 1468 |
| GeoBench | 84% | — |
| VPCT | 91% | — |
| Blueprint-Bench 2 | — | 49.7% |
| Furniture Assembly | — | 80% |
Multilingual Gemini 3 Pro leads
Gemini 3 Pro: 56.9 (#16), GPT-6 Astra: 53.7 (#61)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| LMArena Non-English | 1474 | 1430 |
| LMArena Chinese | 1523 | 1484 |
| LMArena French | 1492 | 1456 |
| LMArena German | 1515 | 1440 |
| LMArena Japanese | 1510 | 1379 |
| LMArena Korean | 1448 | 1426 |
| LMArena Russian | 1493 | 1436 |
| LMArena Spanish | 1470 | 1407 |
Instruction Following Too close to call
Gemini 3 Pro: 76.3 (#45), GPT-6 Astra: 76.3 (#44)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| LMArena Instruction Following | 1458 | 1450 |
| IFEval | 87.7% | — |
Long Context Too close to call
Gemini 3 Pro: 44.0 (#79), GPT-6 Astra: 44.5 (#62)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| LMArena Longer Query | 1471 | 1456 |
| CL-bench | 15.8% | — |
Writing & Preference GPT-6 Astra leads
Gemini 3 Pro: 66.4 (#35), GPT-6 Astra: 75.3 (#7)
| Benchmark | Gemini 3 Pro | GPT-6 Astra |
|---|---|---|
| LMArena Text | 1479 | 1441 |
| LMArena Creative Writing | 1482 | 1418 |
| EQ-Bench Creative Writing | 1525 | 2173 |
| LMArena Multi-Turn | 1484 | 1448 |
| WildBench | 85.9% | — |
Frequently asked questions
Is Gemini 3 Pro better than GPT-6 Astra?
GPT-6 Astra is the stronger model overall, scoring 70.8 to 54.8 on the Noometry Index.
Is Gemini 3 Pro or GPT-6 Astra better for coding?
GPT-6 Astra scores higher on coding benchmarks: 73.7 versus 51.6 in the Noometry coding category.
How many benchmarks do Gemini 3 Pro and GPT-6 Astra share?
38 benchmarks have published results for both models. Gemini 3 Pro has 67 scored results on Noometry and GPT-6 Astra has 56.