Compare / head-to-head
Gemini 3 Pro Previewvs
GPT-6 Astra
GPT-6 Astra leads 9 of 10 shared benchmarks. Gemini 3 Pro Preview is 4.3x cheaper per token. GPT-6 Astra has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 9
GPT-6 Astra leads
Cheaper per token
Gemini 3 Pro Preview
4.3x cheaper, input + output
Larger context
GPT-6 Astra
1.1M tokens
Providers
2 providers
Google · OpenAI
Gemini 3 Pro Preview
Google · released 2025-11-18
textvisionaudiovideo
GPT-6 Astra
OpenAI · released 2026-09-03
textvision
Quality
Benchmark matrix
10 shared · 14 only Gemini 3 Pro Preview · 23 only GPT-6 Astra| Benchmark | Gemini 3 Pro Preview | GPT-6 Astra | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 10 | ||||
| GPQA Diamond | 91.9% ↗ | 96% ↗ | -4.1 pt | GPT-6 Astra |
| BALROG (BALROG) | 58.1% ↗ | 68.3% ↗ | -10.2 pt | GPT-6 Astra |
| Chess Puzzles (Epoch AI run) | 31% ↗epoch run | 72% ↗epoch run | -41 pt | GPT-6 Astra |
| GSO Opt@1 (GSO) | 17.7% ↗ | 77.5% ↗ | -59.8 pt | GPT-6 Astra |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 91.4% ↗epoch run | 100% ↗epoch run | -8.6 pt | GPT-6 Astra |
| SAGE (Vals AI) | 47.6% ↗ | 46.4% ↗ | +1.2 pt | Gemini 3 Pro Preview |
| SimpleBench (SimpleBench) | 76.4% ↗ | 86.5% ↗ | -10.1 pt | GPT-6 Astra |
| SimpleQA Verified | 72.1% ↗ | 75.6% ↗epoch run | -3.5 pt | GPT-6 Astra |
| Vending-Bench 2 (Andon Labs) | 5478.16 ↗ | 15514.7 ↗ | -10036.5 | GPT-6 Astra |
| WeirdML (Håvard Tveit Ihle) | 69.9% ↗ | 93.6% ↗ | -23.7 pt | GPT-6 Astra |
| Only Gemini 3 Pro Preview reports · 14 | ||||
| SWE-bench Verified | 76.2% ↗ | not reported | — | — |
| AIME 2025 | 95% ↗ | not reported | — | — |
| Humanity's Last Exam (no tools) | 37.5% ↗ | not reported | — | — |
| AIME 2025 (with code execution) | 100% ↗ | not reported | — | — |
| ARC-AGI-2 (ARC Prize Verified) | 31.1% ↗ | not reported | — | — |
| CharXiv Reasoning | 81.4% ↗ | not reported | — | — |
| Humanity's Last Exam (with search and code execution) | 45.8% ↗ | not reported | — | — |
| MathArena Apex | 23.4% ↗ | not reported | — | — |
| MMMLU | 91.8% ↗ | not reported | — | — |
| MMMU-Pro | 81% ↗ | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 72.9% ↗epoch run | not reported | — | — |
| Terminal-Bench 2.0 (Terminus-2 agent) | 54.2% ↗ | not reported | — | — |
| Video-MMMU | 87.6% ↗ | not reported | — | — |
| τ2-bench | 85.4% ↗ | not reported | — | — |
| Only GPT-6 Astra reports · 23 | ||||
| LMArena Elo | not reported | 1477.1 ↗ | — | — |
| APEX-Agents (Mercor) | not reported | 64.7% ↗ | — | — |
| AutomationBench 1.0.6 | not reported | 41.4% ↗ | — | — |
| DeepSWE v1.1 (Datacurve) | not reported | 74.1% ↗ | — | — |
| EBR-bench (Epoch AI run) | not reported | 76.2% ↗epoch run | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 97.6% ↗epoch run | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 93.7% ↗epoch run | — | — |
| FrontierSWE V2 (Proximal Labs) | not reported | 65.5% ↗ | — | — |
| Furniture Assembly (Epoch AI run) | not reported | 80% ↗epoch run | — | — |
| LiveBench Agentic Coding (LiveBench) | not reported | 57.3% ↗ | — | — |
| LiveBench Coding (LiveBench) | not reported | 80.4% ↗ | — | — |
| LiveBench Data Analysis (LiveBench) | not reported | 83% ↗ | — | — |
| LiveBench Instruction Following (LiveBench) | not reported | 75.6% ↗ | — | — |
| LiveBench Language (LiveBench) | not reported | 89.4% ↗ | — | — |
| LiveBench Mathematics (LiveBench) | not reported | 96.8% ↗ | — | — |
| LiveBench Reasoning (LiveBench) | not reported | 92.7% ↗ | — | — |
| LMArena Agent (LMArena) | not reported | 0.1227 ↗ | — | — |
| LMArena Vision (LMArena) | not reported | 1284.3 ↗ | — | — |
| LMArena WebDev (LMArena) | not reported | 1787.7 ↗ | — | — |
| MirrorCode (Epoch AI run) | not reported | 46.7% ↗epoch run | — | — |
| Mystery Game Puzzles (Epoch AI run) | not reported | 84% ↗epoch run | — | — |
| Terminal-Bench 4.0 (Vals AI) | not reported | 59.6% ↗ | — | — |
| Terminal-Bench Science 0.1 | not reported | 64.6% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Gemini 3 Pro Preview minus GPT-6 Astra in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Gemini 3 Pro Preview | GPT-6 Astra | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 1.1M tokens | GPT-6 Astra |
| Max output | 66K tokens | 128K tokens | GPT-6 Astra |
| Input price / 1M | $2 ↗ | $10 ↗ | Gemini 3 Pro Preview |
| Output price / 1M | $12 ↗ | $50 ↗ | Gemini 3 Pro Preview |
| Cached input / 1M | — | $1 ↗ | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $14 | $60 | Gemini 3 Pro Preview |
| Modalities | text · vision · audio · video | text · vision | Gemini 3 Pro Preview |
| Released | 2025-11-18 | 2026-09-03 | — |
| Cited benchmark scores | 25 | 39 | — |
Reliability
Provider status
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