ModelRefs / o3 Pro vs Gemma 3 27B
o3 Pro vs Gemma 3 27B
o3 Pro vs Gemma 3 27B: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
Gemma 3 27B: Gemma 3 27B is the largest model in Google's third-generation open Gemma family, accepting text and images across a 128,000-token input context, with output drawn from the same budget. Images are normalised to 896x896 and encoded as 256 tokens each. Google cites support for more than 140 languages and an August 2024 knowledge cutoff. The weights are published under Google's Gemma Terms of Use rather than a standard open-source licence.
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: Gemma 3 27B accepts up to 128,000 tokens, o3 Pro up to 200,000. Confirm the limit for your specific deployment channel before relying on it.
Gemma 3 27B vs o3 Pro at a glance
| Attribute | Gemma 3 27B | o3 Pro |
|---|---|---|
| Provider | OpenAI | |
| Released | 2025-02-01 | 2025-06-10 |
| Context window | 128,000 tokens | 200,000 tokens |
| Input price | $0.1/M tokens | $20/M tokens |
| Output price | $0.3/M tokens | $80/M tokens |
| Licence | Gemma-Terms | Proprietary |
| Self-hostable | Yes, open weights | No, hosted only |
| Modalities | text, vision | text, vision |
Where they differ most
- Reasoning: Gemma 3 27B 68%, o3 Pro 32%. Gemma 3 27B 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 Pro vs Gemma 3 27B.
Frequently asked questions
Which is better, o3 Pro or Gemma 3 27B?
o3 Pro and Gemma 3 27B target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is o3 Pro cheaper than Gemma 3 27B?
Compare $0.0200 vs $0.00010 on this page.