ModelRefs / o3 Pro vs o3
o3 Pro vs o3
o3 Pro vs o3: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
o3: o3 is OpenAI's April 2025 reasoning model, applying deliberate chain-of-thought computation at inference time to mathematics, science and competitive programming tasks, and the release that brought OpenAI's scalable test-time compute approach to its production API. OpenAI has since deprecated it, scheduling the o3-2025-04-16 snapshot to shut down on 11 December 2026 with gpt-5.6-sol as the replacement.
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: o3 accepts up to 200,000 tokens, o3 Pro up to 200,000. Confirm the limit for your specific deployment channel before relying on it.
o3 vs o3 Pro at a glance
| Attribute | o3 | o3 Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Released | 2025-04-16 | 2025-06-10 |
| Context window | 200,000 tokens | 200,000 tokens |
| Input price | $10/M tokens | $20/M tokens |
| Output price | $40/M tokens | $80/M tokens |
| Licence | Proprietary | Proprietary |
| Self-hostable | No, hosted only | No, hosted only |
| Modalities | text, vision | text, vision |
Where they differ most
- Reasoning: o3 86%, o3 Pro 32%. o3 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 o3.
Frequently asked questions
Which is better, o3 Pro or o3?
o3 Pro and o3 target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is o3 Pro cheaper than o3?
Compare $0.0200 vs $0.0100 on this page.