Comparison · prices as of 2026-07-04
GPT-5.1 vs Gemini 3 Pro
On price alone, GPT-5.1 (OpenAI) runs about 25% cheaper than Gemini 3 Pro for a typical chat workload (2K input + 500 output tokens, 1,000 requests/day). Whether that's the right trade depends on the capability gap — pricing below, verify quality on your own evals.
| Spec | GPT-5.1 | Gemini 3 Pro |
|---|---|---|
| Input / MTok | $1.25 | $2 |
| Output / MTok | $10 | $12 |
| Context window | 400K | 1M |
| Max output | 128K | 66K |
| Class | frontier | frontier |
| Reference workload / month | $225.00 | $300.00 |
Sources: OpenAI pricing · Google pricing. Run your own numbers in the cost calculator.