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Google: Gemini 3.1 Pro Preview vs OpenAI: GPT-5.6 Sol

google logoGoogle: Gemini 3.1 Pro Previewgoogle/gemini-3.1-pro-previewVSopenai logoOpenAI: GPT-5.6 Solopenai/gpt-5.6-sol

Google: Gemini 3.1 Pro Preview wins on more metrics (5 of 8), but the right pick depends on what you optimize for — see the breakdown below.

MetricGoogle: Gemini 3.1 Pro PreviewOpenAI: GPT-5.6 Sol
Intelligence Index46.558.9✓
Coding Index68.877.4✓
GPQA Diamond94%94%
Design Arena Elo1347✓—
Speed (tokens/sec)100✓48
Latency2.8s✓3.7s
Input price /M$2.00✓$5.00
Output price /M$12.00✓$30.00
Context window1.0M1.1M✓
CapabilitiesReasoningToolsJSONVisionAudioReasoningToolsJSONVision
Google: Gemini 3.1 Pro Preview details →OpenAI: GPT-5.6 Sol details →