Updated March 26, 2026· Based on independent benchmark data
Gemini 3.1 Pro Preview is 15.0x cheaper at $2.00/1M tokens vs $30/1M.
| Metric | OpenAI: GPT-5.5 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Intelligence Score | N/A | 57.2 |
| Coding Score | N/A | 55.5 |
| Math Score | N/A | N/A |
| Speed (tok/s) | N/A | 113 tok/s |
| Latency (TTFT) | N/A | 23.84s |
| Input Price / 1M tokens | $30 | $2.00 |
| Output Price / 1M tokens | $180 | $12 |
| Context Window | 1.1M | 1.0M |
| Max Output Tokens | 128K | N/A |
| Input Modalities | File + Image + Text | Audio + File + Image + Text + Video |
| Output Modalities |
Gemini 3.1 Pro Preview is more affordable at $2.00/1M input tokens ($12/1M output), while OpenAI: GPT-5.5 Pro costs $30/1M input ($180/1M output). That makes OpenAI: GPT-5.5 Pro 15.0x more expensive per token, which can add up significantly at scale. For a typical workload of 100 requests per day at 2,000 tokens each, OpenAI: GPT-5.5 Pro would cost approximately $180.00/month vs $12.00/month for Gemini 3.1 Pro Preview in input costs alone.
OpenAI: GPT-5.5 Pro offers a larger context window at 1.1M tokens compared to Gemini 3.1 Pro Preview's 1.0M.
Choose Gemini 3.1 Pro Preview when you need lower cost.
Gemini 3.1 Pro Preview is cheaper at $2.00/1M input tokens vs $30/1M for OpenAI: GPT-5.5 Pro.
Yes, OpenAI: GPT-5.5 Pro supports image input. Gemini 3.1 Pro Preview also supports images.
OpenAI: GPT-5.5 Pro has a larger context window at 1.1M compared to Gemini 3.1 Pro Preview's 1.0M.
Data last synced: March 26, 2026
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| Free Tier | No | No |