GPT-5.4 vs Gemini 2.5 Pro
A direct API-pricing comparison between GPT-5.4 and Gemini 2.5 Pro. Below: every cost dimension side by side, then the bottom line for a typical workload.
Bottom line
For a typical 5K-in / 1K-out request, Gemini 2.5 Pro is the cheaper choice at $0.016 per call — 1.7× less than GPT-5.4 at $0.028.
| GPT-5.4OpenAI | Gemini 2.5 ProGoogle | |
|---|---|---|
| Input / 1M tokens | $2.50 | $1.25 |
| Output / 1M tokens | $15.00 | $10.00 |
| Cached input / 1M | — | $0.310 |
| Context window | 400K | 1M |
| Provider | OpenAI |
Green = cheaper on that line. Prices are estimates from public pricing pages; verify against OpenAI and Google before relying on them.
Which is cheaper, GPT-5.4 or Gemini 2.5 Pro?
On output tokens — usually the dominant cost — GPT-5.4 charges $15.00 per million versus $10.00 for Gemini 2.5 Pro. The right pick depends on your input/output ratio and how much you can serve from cache. Use the calculator to model your exact traffic.