ModelRefs / Gemini 3 Pro vs o3 Pro
Gemini 3 Pro vs o3 Pro
Gemini 3 Pro vs o3 Pro: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
Gemini 3 Pro: Gemini 3 Pro is Google DeepMind's flagship multimodal model with a 2M-token context window spanning text, image, audio, and video inputs. It is built for long-context reasoning, document understanding, and multimodal agentic workflows.
o3 Pro: o3 Pro is OpenAI's highest-capability reasoning model, applying extended compute at inference time to solve complex scientific, mathematical, and programming problems. It achieved the highest published scores on ARC-AGI-2 and competitive programming benchmarks at its June 2025 release.
Context window: Gemini 3 Pro accepts up to 2,000,000 tokens, o3 Pro up to 200,000. Confirm the limit for your specific deployment channel before relying on it.
Gemini 3 Pro vs o3 Pro at a glance
| Attribute | Gemini 3 Pro | o3 Pro |
|---|---|---|
| Provider | OpenAI | |
| Released | 2025-11-18 | 2025-06-10 |
| Context window | 2,000,000 tokens | 200,000 tokens |
| Input price | $1.25/M tokens | $20/M tokens |
| Output price | $10/M tokens | $80/M tokens |
| Licence | Proprietary | Proprietary |
| Self-hostable | No, hosted only | No, hosted only |
| Modalities | text, vision, audio, video | text, vision |
Benchmarks reported for both
| Benchmark | Gemini 3 Pro | o3 Pro | Reported |
|---|---|---|---|
| ARC-AGI 2 (solved) | 31.1 | 4.9 | Date not published |
Each row compares the same benchmark, the same reported metric, and the same task set. Scores are as published by their cited sources on the dates shown. Different runs still use different harnesses and prompts, so treat these as directional evidence rather than a head-to-head result.
Where they differ most
- Reasoning: Gemini 3 Pro 56%, o3 Pro 32%. Gemini 3 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 Gemini 3 Pro vs o3 Pro.
Frequently asked questions
Which is better, Gemini 3 Pro or o3 Pro?
Gemini 3 Pro and o3 Pro target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is Gemini 3 Pro cheaper than o3 Pro?
Compare $0.00125 vs $0.0200 on this page.