Verdict
GPT-6 Astra leads 11–0 across 11 shared benchmarks.
Gemini 3 Pro 0 · GPT-6 Astra 11 · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Reasoning: GPT-6 Astra leads 3–0 across 3 shared reasoning benchmarks (largest gap: ARC-AGI, 98.5 vs 75 — single evaluator).
Game Playing: GPT-6 Astra leads 2–0 across 2 shared game playing benchmarks (largest gap: Chess Puzzles, 72.64 vs 27.4 — protocols undisclosed).
Vendor claims — compare against the measured scores above. A claim is what a developer says about its own model, not an independent measurement.
Context Handling
“state-of-the-art reasoning, vision and spatial understanding, leading multilingual performance, and 1 million-token context window”
Multimodal
“It's the best model in the world for multimodal understanding and our most powerful agentic and vibe coding model yet”
Reasoning
“It's state-of-the-art in reasoning, built to grasp depth and nuance”
No vendor claims on file for GPT-6 Astra.
GPT-6 Astra leads 11–0 across 11 shared benchmarks. Gemini 3 Pro leads 0 benchmarks and GPT-6 Astra leads 11. Higher isn't always better — see the integrity caveats on each benchmark.
Gemini 3 Pro and GPT-6 Astra have 11 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
GPT-6 Astra leads reasoning 3–0. GPT-6 Astra leads game playing 2–0.