ModelRefs / o3 Pro vs DeepSeek V3
o3 Pro vs DeepSeek V3
o3 Pro vs DeepSeek V3: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
DeepSeek V3: DeepSeek V3 is DeepSeek's December 2024 open-weights Mixture-of-Experts model, activating 37 billion of 671 billion total parameters per token across a 128,000-token context window. It ships under the MIT licence with published weights and a technical report, and DeepSeek reports its own evaluation table for the text chat model under an 8,000-token output limit.
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: DeepSeek V3 accepts up to 128,000 tokens, o3 Pro up to 200,000. Confirm the limit for your specific deployment channel before relying on it.
DeepSeek V3 vs o3 Pro at a glance
| Attribute | DeepSeek V3 | o3 Pro |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Released | 2024-12-26 | 2025-06-10 |
| Context window | 128,000 tokens | 200,000 tokens |
| Input price | $0.27/M tokens | $20/M tokens |
| Output price | $1.1/M tokens | $80/M tokens |
| Licence | MIT | Proprietary |
| Self-hostable | Yes, open weights | No, hosted only |
| Modalities | text | text, vision |
Where they differ most
- Reasoning: DeepSeek V3 72%, o3 Pro 32%. DeepSeek V3 leads on this dimension.
- Coding: DeepSeek V3 67%, o3 Pro 85%. o3 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 Pro vs DeepSeek V3.
Frequently asked questions
Which is better, o3 Pro or DeepSeek V3?
o3 Pro and DeepSeek V3 target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is o3 Pro cheaper than DeepSeek V3?
Compare $0.0200 vs $0.00027 on this page.