Head-to-head
Gemini 3.1 Pro vs GPT-5.6 Terra
As of October 25, 2026, Gemini 3.1 Pro leads GPT-5.6 Terra on the Analyzer Index, 87.0 to 82.3.
Normalized scores are min-maxed per benchmark across all models we track (0–100). Open the interactive compare view to add benchmarks to the radar chart or pull in more models.
Gemini 3.1 Pro
GoogleGPT-5.6 Terra
OpenAI| At a glance | Gemini 3.1 Pro | GPT-5.6 Terra |
|---|---|---|
| Analyzer Index | 87.0 (9/13) | 82.3 (5/13) |
| Blended price | $2.25/M | $2.25/M |
| Cheapest host | maker's API | maker's API |
| Context | 2.0M | 1.1M |
| Output speed | 188 tok/s | 89 tok/s |
| Time to first token | 87.47 s | 2.00 s |
| Benchmark | Gemini 3.1 Pro | GPT-5.6 Terra |
|---|---|---|
Chatbot Arena Elo Arena | ||
SWE-bench Verified SWE-bench | — | |
MMMU-Pro MMMU-Pro | — | |
Output Speed Speed | ||
Time to First Token TTFT | ||
FrontierMath Tiers 1-3 FrontierMath | — | |
SimpleQA Verified SimpleQA | ||
OTIS Mock AIME 2024-2025 OTIS AIME | ||
Humanity's Last Exam HLE | — | |
ARC-AGI 2 ARC-AGI 2 | ||
Terminal-Bench 2 TermBench 2 | — | |
Frontier Composite Frontier | ||
Output Stability Stability | — | |
Format Adherence Format | — | |
Recovery Rate Recovery | — | |
API Success Rate API OK | ||
Safety Handling Safety | — |
Methodology matches the main AI Model Analyzer About page.