Gemini 3.1 Pro vs GPT-5.1 Thinking: Specs & Benchmark Comparison
| Characteristic | Gemini 3.1 Pro | GPT-5.1 Thinking |
|---|---|---|
| Company | OpenAI | |
| Release Date | February 19, 2026 | November 11, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 256K |
| Context (output) | 66K | 128K |
| Input Price / 1M | $2.50 | $3.00 |
| Output Price / 1M | $15.00 | $12.00 |
| Average Score | 0.8 | 0.9 |
| Benchmarks | ||
| GPQA | 0.9 | 0.9 |
Visual Benchmark Comparison
Gemini 3.1 Pro
GPT-5.1 Thinking
GPQA0.9 vs 0.9
0.9
0.9
Verdict
Gemini 3.1 Pro leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Gemini 3.1 Pro — 0.8, GPT-5.1 Thinking — 0.9.
API Cost
GPT-5.1 Thinking is 1.2x cheaper: input $3.00/1M vs $2.50/1M tokens.
Context Window
Gemini 3.1 Pro supports a larger context: 1M vs 256K tokens.
Recency
Gemini 3.1 Pro is newer: released 2/19/2026 vs 11/11/2025.
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The Gemini 3.1 Pro and GPT-5.1 Thinking comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Gemini 3.1 Pro or GPT-5.1 Thinking page. See also the complete list of AI model comparisons.