Google: Gemini 3.1 Pro Preview vs OpenAI: GPT-5.2-Codex
Side-by-side comparison of Google: Gemini 3.1 Pro Preview and OpenAI: GPT-5.2-Codex. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
strong confidenceGoogle: Gemini 3.1 Pro Preview leads overall
Google: Gemini 3.1 Pro Preview leads clearly, winning on 4 of 5 dimensions. Choose Google: Gemini 3.1 Pro Preview unless your workflow specifically requires OpenAI: GPT-5.2-Codex's advantages.
Best for with Google: Gemini 3.1 Pro Preview
Best for with OpenAI: GPT-5.2-Codex
Side-by-side
Technical specifications
| Google: Gemini 3.1 Pro Preview | OpenAI: GPT-5.2-Codex | |
|---|---|---|
| Provider | OpenAI | |
| Input price | $2/M | $2/M |
| Output price | $12/M | $14/M |
| Context window | 1.0M | 400K |
| Max output | 66K | 128K |
| Capabilities | Tool useVisionAudioReasoning | Tool useVisionReasoning |
| Released | Feb 19, 2026 | Jan 14, 2026 |
Scoring breakdown
How each dimension compares
Price
Google: Gemini 3.1 Pro Preview leadsGoogle: Gemini 3.1 Pro Preview
$2/M in / $12/M out
OpenAI: GPT-5.2-Codex
$2/M in / $14/M out
Context Window
Google: Gemini 3.1 Pro Preview leadsGoogle: Gemini 3.1 Pro Preview
1.0M
OpenAI: GPT-5.2-Codex
400K
Capabilities
Google: Gemini 3.1 Pro Preview leadsGoogle: Gemini 3.1 Pro Preview
4/4 features
OpenAI: GPT-5.2-Codex
3/4 features
Max Output
OpenAI: GPT-5.2-Codex leadsGoogle: Gemini 3.1 Pro Preview
66K
OpenAI: GPT-5.2-Codex
128K
Release Date
Google: Gemini 3.1 Pro Preview leadsGoogle: Gemini 3.1 Pro Preview
Feb 19, 2026
OpenAI: GPT-5.2-Codex
Jan 14, 2026
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