token.app › Compare › o3 vs DeepSeek V4 Flash 0731
o3 vs DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 leads on 2 of 3 shared benchmarks. DeepSeek V4 Flash 0731 is 31× cheaper per token on a blended 3:1 basis. DeepSeek V4 Flash 0731 accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| o3 | DeepSeek V4 Flash 0731 | |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Input $/1M | $2.00 | $0.090 |
| Output $/1M | $8.00 | $0.180 |
| Blended $/1M | $3.50 | $0.113 |
| Context window | 200K | 1.0M |
| Max output | 100K | 384K |
| Released | Apr 2025 | Jul 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 81.8% | 91.0% |
| SimpleQA Verified | 53.0% | 34.7% |
| OTIS Mock AIME | 84.4% | 94.4% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose o3 if…
- Higher SimpleQA Verified (53.0% vs 34.7%)
Choose DeepSeek V4 Flash 0731 if…
- Costs less per token — $0.113 vs $3.50 blended
- Higher GPQA Diamond (91.0% vs 81.8%)
- Higher OTIS Mock AIME (94.4% vs 84.4%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jul 2026)
FAQ
Which is better, o3 or DeepSeek V4 Flash 0731?
Across the 3 benchmarks both models have independently-run scores for, o3 leads on 1 and DeepSeek V4 Flash 0731 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is o3 cheaper than DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 is cheaper: $0.113 versus $3.50 per million tokens blended at 3:1 input:output. Input alone: $2.00 vs $0.090. Output alone: $8.00 vs $0.180.
What context windows do o3 and DeepSeek V4 Flash 0731 have?
o3: 200,000 tokens. DeepSeek V4 Flash 0731: 1,048,576 tokens.
Who makes o3 and DeepSeek V4 Flash 0731?
o3 is made by OpenAI. DeepSeek V4 Flash 0731 is made by DeepSeek.