Gemini 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.…
Model details →Google: Gemini 3.1 Pro Preview vs OpenAI: o3 Deep Research
Google: Gemini 3.1 Pro Preview wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
o3-deep-research is OpenAI's advanced model for deep research, designed to tackle complex, multi-step research tasks. Note: This model always uses the 'web_search' tool which adds additional cost.
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview | OpenAI: o3 Deep Research | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 200K | 🏆 Google: Gemini 3.1 Pro Preview |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $10.00 | 🏆 Google: Gemini 3.1 Pro Preview |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $40.00 | 🏆 Google: Gemini 3.1 Pro Preview |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Google: Gemini 3.1 Pro Preview better than OpenAI: o3 Deep Research?
Google: Gemini 3.1 Pro Preview wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Gemini 3.1 Pro Preview and OpenAI: o3 Deep Research?
Input: $2.00 vs $10.00 per 1M tokens. Output: $12.00 vs $40.00 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview and OpenAI: o3 Deep Research support?
Google: Gemini 3.1 Pro Preview supports up to 1.0M tokens. OpenAI: o3 Deep Research supports up to 200K tokens.
Do both Google: Gemini 3.1 Pro Preview and OpenAI: o3 Deep Research support tool calling?
Google: Gemini 3.1 Pro Preview: yes. OpenAI: o3 Deep Research: yes.