Gemini 2.5 Pro vs o3
Gemini 2.5 Pro is cheaper than o3 by about 2% on a blended (75% input / 25% output) basis. Gemini 2.5 Pro charges $1.25 / $10.00 per 1M input/output tokens; o3 charges $2.00 / $8.00.
| Field | Gemini 2.5 Pro | o3 |
|---|---|---|
| Input $/Mtok | $1.25 | $2.00 |
| Output $/Mtok | $10.00 | $8.00 |
| Cache read $/Mtok | $0.13 | $0.50 |
| Cache write $/Mtok | – | – |
| Input $/Mchar | n/a | 0.56 |
| Output $/Mchar | n/a | 2.25 |
| Context window | 1048576 | 200000 |
| Tokenizer | gemini | o200k |
| Confidence? | official | api |
| Source | official-google | openrouter |
Confidence: official = vendor pricing page · api = OpenRouter per-host · aggregator = community list, may lag · unreviewed = automatic extraction awaiting review. When sources disagree the most authoritative wins. Details: /methodology#confidence
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 | Gemini 2.5 Pro | 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
Gemini 2.5 Pro vs o3: $1.25/$10.00 vs $2.00/$8.00 per 1M tokens as of 2026-10-04. Token Barometer by Dejan Strbad, https://tokenbarometer.com, data CC BY 4.0. https://tokenbarometer.com/compare/google_gemini-2.5-pro-vs-openai_o3