Google: Gemini 3.1 Pro Preview Custom Tools vs OpenAI: GPT-5.4
Side-by-side comparison of Google: Gemini 3.1 Pro Preview Custom Tools and OpenAI: GPT-5.4. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
moderate confidenceOpenAI: GPT-5.4 leads overall
OpenAI: GPT-5.4 has a meaningful edge overall, but Google: Gemini 3.1 Pro Preview Custom Tools is stronger in specific areas. Your use case determines the right pick.
Best for with Google: Gemini 3.1 Pro Preview Custom Tools
Best for with OpenAI: GPT-5.4
Side-by-side
Technical specifications
| Google: Gemini 3.1 Pro Preview Custom Tools | OpenAI: GPT-5.4 | |
|---|---|---|
| Provider | OpenAI | |
| Input price | $2/M | $3/M |
| Output price | $12/M | $15/M |
| Context window | 1.0M | 1.1M |
| Max output | 66K | 128K |
| Capabilities | Tool useVisionAudioReasoning | Tool useVisionReasoning |
| Released | Feb 25, 2026 | Mar 5, 2026 |
Scoring breakdown
How each dimension compares
Price
Google: Gemini 3.1 Pro Preview Custom Tools leadsGoogle: Gemini 3.1 Pro Preview Custom Tools
$2/M in / $12/M out
OpenAI: GPT-5.4
$3/M in / $15/M out
Context Window
OpenAI: GPT-5.4 leadsGoogle: Gemini 3.1 Pro Preview Custom Tools
1.0M
OpenAI: GPT-5.4
1.1M
Capabilities
Google: Gemini 3.1 Pro Preview Custom Tools leadsGoogle: Gemini 3.1 Pro Preview Custom Tools
4/4 features
OpenAI: GPT-5.4
3/4 features
Max Output
OpenAI: GPT-5.4 leadsGoogle: Gemini 3.1 Pro Preview Custom Tools
66K
OpenAI: GPT-5.4
128K
Release Date
OpenAI: GPT-5.4 leadsGoogle: Gemini 3.1 Pro Preview Custom Tools
Feb 25, 2026
OpenAI: GPT-5.4
Mar 5, 2026
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