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: GPT-5 Chat
Google: Gemini 3.1 Pro Preview wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5 Chat is designed for advanced, natural, multimodal, and context-aware conversations for enterprise applications.
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview | OpenAI: GPT-5 Chat | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 128K | 🏆 Google: Gemini 3.1 Pro Preview |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $1.25 | 🏆 OpenAI: GPT-5 Chat |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $10.00 | 🏆 OpenAI: GPT-5 Chat |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | — | 🏆 Google: Gemini 3.1 Pro Preview |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | — | 🏆 Google: Gemini 3.1 Pro Preview |
Frequently asked questions
Is Google: Gemini 3.1 Pro Preview better than OpenAI: GPT-5 Chat?
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: GPT-5 Chat?
Input: $2.00 vs $1.25 per 1M tokens. Output: $12.00 vs $10.00 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview and OpenAI: GPT-5 Chat support?
Google: Gemini 3.1 Pro Preview supports up to 1.0M tokens. OpenAI: GPT-5 Chat supports up to 128K tokens.
Do both Google: Gemini 3.1 Pro Preview and OpenAI: GPT-5 Chat support tool calling?
Google: Gemini 3.1 Pro Preview: yes. OpenAI: GPT-5 Chat: not advertised.