token.app › Compare › Claude Opus 4.5 vs DeepSeek V4 Flash 0731
Claude Opus 4.5 vs DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 leads on 4 of 5 shared benchmarks. DeepSeek V4 Flash 0731 is 89× 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
| Claude Opus 4.5 | DeepSeek V4 Flash 0731 | |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Input $/1M | $5.00 | $0.090 |
| Output $/1M | $25.00 | $0.180 |
| Blended $/1M | $10.00 | $0.113 |
| Context window | 200K | 1.0M |
| Max output | 64K | 384K |
| Released | Nov 2025 | Jul 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 86.0% | 91.0% |
| FrontierMath T1–3 | 34.4% | 57.5% |
| FrontierMath T4 | 4.9% | 24.4% |
| SimpleQA Verified | 41.8% | 34.7% |
| OTIS Mock AIME | 86.1% | 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 Claude Opus 4.5 if…
- Higher SimpleQA Verified (41.8% vs 34.7%)
Choose DeepSeek V4 Flash 0731 if…
- Costs less per token — $0.113 vs $10.00 blended
- Higher GPQA Diamond (91.0% vs 86.0%)
- Higher FrontierMath T1–3 (57.5% vs 34.4%)
- Higher FrontierMath T4 (24.4% vs 4.9%)
- Higher OTIS Mock AIME (94.4% vs 86.1%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jul 2026)
FAQ
Which is better, Claude Opus 4.5 or DeepSeek V4 Flash 0731?
Across the 5 benchmarks both models have independently-run scores for, Claude Opus 4.5 leads on 1 and DeepSeek V4 Flash 0731 leads on 4. Benchmarks are one input — price and context window are on this page too.
Is Claude Opus 4.5 cheaper than DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 is cheaper: $0.113 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $5.00 vs $0.090. Output alone: $25.00 vs $0.180.
What context windows do Claude Opus 4.5 and DeepSeek V4 Flash 0731 have?
Claude Opus 4.5: 200,000 tokens. DeepSeek V4 Flash 0731: 1,048,576 tokens.
Who makes Claude Opus 4.5 and DeepSeek V4 Flash 0731?
Claude Opus 4.5 is made by Anthropic. DeepSeek V4 Flash 0731 is made by DeepSeek.