Google: Gemini 2.5 Pro vs OpenAI: o3
Google: Gemini 2.5 Pro is cheaper than OpenAI: o3 by about 2% on a blended (75% input / 25% output) basis. Google: Gemini 2.5 Pro charges $1.250000 / $10.000000 per 1M input/output tokens; OpenAI: o3 charges $2.000000 / $8.000000.
| Field | Google: Gemini 2.5 Pro | OpenAI: o3 |
|---|---|---|
| Input $/Mtok | $1.250000 | $2.000000 |
| Output $/Mtok | $10.000000 | $8.000000 |
| Cache read $/Mtok | $0.125000 | $0.500000 |
| Cache write $/Mtok | – | – |
| Input $/Mchar | n/a | 0.563428 |
| Output $/Mchar | n/a | 2.253712 |
| Context window | 1048576 | 200000 |
| Tokenizer | gemini | o200k |
Price history
Same workload, monthly cost
Illustrative monthly cost at 10M tokens/month, split per workload preset. Not a substitute for the calculator, which uses your own volume, cache and batch assumptions.
| Workload | Google: Gemini 2.5 Pro | OpenAI: o3 |
|---|---|---|
| Coding agent | $16.88 | $23.00 |
| RAG chat | $25.63 | $29.00 |
| Summarisation (batch) | $21.25 | $26.00 |
| Classification | $14.25 | $21.20 |
| Chat assistant | $47.50 | $44.00 |
| Content generation | $82.50 | $68.00 |
Cite this page
Google: Gemini 2.5 Pro vs OpenAI: o3: $1.250000/$10.000000 vs $2.000000/$8.000000 per 1M tokens, as of 2026-10-04 (Token Barometer, https://tokenbarometer.com/compare/google_gemini-2.5-pro-vs-openai_o3).
Google: Gemini 2.5 Pro page | OpenAI: o3 page | Open in calculator