Gemini vs GPT Cost Calculator
Compare Google Gemini and OpenAI GPT costs side by side.
With the default inputs, Gemini 2.5 Pro is cheaper by $0.0000/month — 0.0% difference for this workload. Enter your own numbers below to recompute instantly; the full step-by-step math is shown under the worked example.
Results update automatically as you type.
| Gemini 2.5 Pro | $0.00625 | $625.00 | 1,048,576 | |
| GPT-5 | OpenAI | $0.00625 | $625.00 | 128,000 |
Compare a Gemini model against a GPT model for the same workload and see which wins on price per request and per month.
How this is calculated
We cost the same workload on both models — (input × input price + output × output price) per request, scaled by requests per month — and show the per-request and monthly difference. Note some Gemini tiers charge more above 200K input tokens; this uses base rates.
Is this a good result? What to do next
Gemini Flash tiers are very cheap, while Pro tiers compete with GPT flagships — so the winner depends on which tiers you pick and your token mix. Watch the Gemini long-context step-up if your prompts are large.
Typical planning ranges
- Gemini Flash tiers
- usually cheapest
- Gemini Pro vs GPT flagship
- close
- Gemini >200K input
- higher long-context rate
Ranges are typical planning figures to sanity-check your result, not authoritative benchmarks. Your numbers will vary with use case, volume, and vendor.
How to improve this number
- Enter your real token mix and volume.
- Keep prompts under 200K on Gemini Pro to avoid the step-up.
- Validate quality on your prompts.
Common mistakes
- Using base rates to budget prompts over 200K tokens.
- Deciding on price without a quality check.
When to use a different approach
To rank all models, use the model cost comparison. For Gemini alone, use the Gemini API cost calculator.
Worked example (defaults)
With the default inputs above, here is the result:
| Gemini 2.5 Pro | $0.00625 | $625.00 | 1,048,576 | |
| GPT-5 | OpenAI | $0.00625 | $625.00 | 128,000 |
Sources & references
Frequently asked questions
Is Gemini cheaper than GPT?+
Gemini Flash tiers are very cheap; Pro tiers compete with GPT flagships. This shows the exact difference for your token mix.
Do prices change with context length?+
Some Gemini tiers charge more above 200K tokens. This uses base rates; check the model page for long-context pricing.
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