ModelRefs / o3 vs Gemini 2.5 Pro — Benchmarks, Pricing & Coding Compari…
o3 vs Gemini 2.5 Pro — Benchmarks, Pricing & Coding Compari…
o3 vs Gemini 2.5 Pro: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
Gemini 2.5 Pro: Gemini 2.5 Pro is Google DeepMind's experimental thinking model with a 2M-token multimodal context window, released in March 2025. It topped the LMSys Chatbot Arena leaderboard at launch and introduced adaptive reasoning budgets that balance response quality against latency.
o3: o3 is OpenAI's extended-thinking reasoning model, applying deliberate chain-of-thought computation to excel on mathematics, science, and competitive programming tasks. Released in April 2025, it introduced OpenAI's scalable test-time compute approach at production scale.
Context window: Gemini 2.5 Pro accepts up to 2,000,000 tokens, o3 up to 200,000. Confirm the limit for your specific deployment channel before relying on it.
Gemini 2.5 Pro vs o3 at a glance
| Attribute | Gemini 2.5 Pro | o3 |
|---|---|---|
| Provider | OpenAI | |
| Released | 2025-03-01 | 2025-04-01 |
| Context window | 2,000,000 tokens | 200,000 tokens |
| Input price | $1.25/M tokens | $10/M tokens |
| Output price | $10/M tokens | $40/M tokens |
| Licence | Proprietary | Proprietary |
| Self-hostable | No, hosted only | No, hosted only |
| Modalities | text, vision, audio, video | text, vision |
Where they differ most
- Cost Efficiency: Gemini 2.5 Pro 47%, o3 13%. Gemini 2.5 Pro leads on this dimension.
Capability scores are ModelRefs' own derived signals, not vendor claims or benchmark results. Validate against your own workload before relying on them.
Continue your research
Use these connected ModelRefs sections to compare alternatives, inspect implementation paths, and review the evidence and governance boundaries relevant to o3 vs Gemini 2.5 Pro — Benchmarks, Pricing & Coding Compari….
Frequently asked questions
Which is better, o3 or Gemini 2.5 Pro?
o3 and Gemini 2.5 Pro target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is o3 cheaper than Gemini 2.5 Pro?
Compare $0.0100 vs $0.00125 on this page.