o3 vs DeepSeek V3.2 (Chat)
Pricing, context window, and benchmark comparison · Last updated April 2026
DeepSeek V3.2 (Chat) is cheaper than o3 at $0.28/1M/1M vs $2.00/1M/1M input tokens — a 7.1x cost difference. o3 scores higher on quality benchmarks (ELO 1395). Choose DeepSeek V3.2 (Chat) for cost-sensitive workloads; choose o3 for maximum quality.
Which is cheaper: o3 or DeepSeek V3.2 (Chat)?
DeepSeek V3.2 (Chat) is the cheaper option at $0.28/1M per 1M input tokens, compared to $2.00/1M for o3. That is a 7.1x cost difference on input tokens. Output pricing follows a similar pattern: o3 charges $8.00/1M/1M vs $0.42/1M/1M for DeepSeek V3.2 (Chat).
Which has better quality: o3 or DeepSeek V3.2 (Chat)?
Based on LMSYS Chatbot Arena rankings, o3 achieves a higher ELO score (1395 vs 1355), suggesting stronger performance on open-ended tasks. o3 excels at top-tier reasoning on math, science, and agentic tasks. DeepSeek V3.2 (Chat) is known for frontier-class quality at ~10x lower cost than us flagships.
Which should you choose: o3 or DeepSeek V3.2 (Chat)?
- → Top-tier reasoning on math, science, and agentic tasks
- → 87% cheaper than original o1 at the same capability tier
- → 200K context window
- → Frontier-class quality at ~10x lower cost than US flagships
- → Cache-hit input pricing of $0.028/1M (90% off)
- → Open weights available
Frequently Asked Questions
Which is cheaper: o3 or DeepSeek V3.2 (Chat)?
DeepSeek V3.2 (Chat) is cheaper at $0.28/1M per 1M input tokens, making it 7.1x more affordable.
Which has better quality: o3 or DeepSeek V3.2 (Chat)?
o3 scores higher on the LMSYS Chatbot Arena with an ELO of 1395, suggesting better overall quality for most tasks.
Which has a larger context window: o3 or DeepSeek V3.2 (Chat)?
o3 has a larger context window at 200K tokens.
Should I choose o3 or DeepSeek V3.2 (Chat)?
Choose DeepSeek V3.2 (Chat) if cost is the priority. Choose o3 if benchmark quality is most important. Consider your specific use case: o3 is best for reasoning and math, while DeepSeek V3.2 (Chat) excels at coding and low-cost.
Is o3 or DeepSeek V3.2 (Chat) open source?
o3 is proprietary. DeepSeek V3.2 (Chat) is open source.