Comparison page
GPT-5 vs Gemini 3.1 Pro Preview
Compare OpenAI GPT-5 against Google’s current Gemini Pro preview for premium production work.
Side-by-side pricing
The table uses the same example request on both models so you can compare premium production workloads without changing the prompt shape.
Input 1,000 / Output 250
| Model | Input / 1M | Cached input / 1M | Output / 1M | Example request | Source |
|---|---|---|---|---|---|
GPT-5 OpenAI's current flagship general-purpose model for complex work. | $1.25 | No public rate | $10.0 | $0.0037 | OpenAI pricing |
Gemini 3.1 Pro Preview Google's latest Gemini Pro preview for complex multimodal reasoning workloads. | $2.00 | No public rate | $12.0 | $0.0050 | Google Gemini pricing |
When to choose each model
GPT-5
Choose GPT-5 when you want the economics or capability profile of OpenAI and you can justify the published rate.
Gemini 3.1 Pro Preview
Choose Gemini 3.1 Pro Preview when you need the second option in this comparison and want to test whether it lowers spend without hurting the workflow.
Use cases
- • Choosing a flagship default for an assistant product.
- • Benchmarking the top-tier OpenAI and Google options.
- • Validating spend on important, high-accuracy workflows.
If the prompt is noisy or repetitive, run it through the prompt optimizer first.
If the brief is too loose, use the context engineer to tighten the instructions before you compare models again.
For the broader pricing strategy, read the LLM cost optimization pillar and the cost-per-million-tokens cheat sheet.
FAQ
Which model is cheaper?
GPT-5 is the cheaper current flagship input-rate option in this pair.
When would Gemini win?
When your workflow is deeply tied to Google infrastructure or needs Gemini-specific behavior.
Should I use the calculator too?
Yes. Use the comparison page to shortlist, then confirm the exact request cost in the calculator.