Google: Gemini 3.1 Pro Preview vs OpenAI: GPT-5.5 Pro
Side-by-side comparison — pricing, context window, capabilities, and live leaderboard data.
Key differences
- Google: Gemini 3.1 Pro Preview is 93% cheaper per 1K input tokens than OpenAI: GPT-5.5 Pro ($0.0020 vs $0.0300).
- Google: Gemini 3.1 Pro Preview is built by Google; OpenAI: GPT-5.5 Pro is built by OpenAI.
Specifications
| Google: Gemini 3.1 Pro Preview | OpenAI: GPT-5.5 Pro | |
|---|---|---|
| Provider | OpenAI | |
| Context window | 1049K | 1050K |
| Max output tokens | 8192 | 8192 |
| Input price / 1K tokens | $0.0020 | $0.0300 |
| Output price / 1K tokens | $0.0120 | $0.1800 |
| Vision support | Yes | Yes |
| Function calling | No | No |
| License | Proprietary | Proprietary |
About Google: Gemini 3.1 Pro Preview
US·ClosedGemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...
View Google: Gemini 3.1 Pro Preview reliability and benchmark history →About OpenAI: GPT-5.5 Pro
US·ClosedGPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
View OpenAI: GPT-5.5 Pro reliability and benchmark history →Try them yourself
Run the same prompt against Google: Gemini 3.1 Pro Preview and OpenAI: GPT-5.5 Pro side-by-side on PromptPit.
Start a comparison