Claude Opus 5.5 (Max, Default Fallback) vs DeepSeek V4 Flash 0731 (Max)
Claude Opus 5.5 (Max, Default Fallback) scores 59.1 on the Artificial Analysis Intelligence Index, against 34.3 for DeepSeek V4 Flash 0731 (Max). DeepSeek V4 Flash 0731 (Max) costs $0.175 per million tokens (3:1 blend), against $8 for Claude Opus 5.5 (Max, Default Fallback). DeepSeek V4 Flash 0731 (Max) generates 130 t/s, against 95 t/s for Claude Opus 5.5 (Max, Default Fallback). Both accept a context of 1M tokens.
Comparison generated from the catalogue data. Add or remove models below to refine it.
2 models compared
- DeepSeek V4 Flash 0731 (Max)
DeepSeek
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | DeepSeek V4 Flash 0731 (Max) DeepSeek | Add a model · 2/4 | |
|---|---|---|---|
| Intelligence | Best: 59.1 | 34.3 | |
| Coding | — | 69.1 | |
| Agentic | — | 41 | |
| Cyber Index | 28.7% | — | |
| Speed | 95 t/s | Best: 130 t/s | |
| TTFT | 643 s | Best: 1.62 s | |
| Input · $ / 1M tokens | $4×28.6 relative to the lowest price among the compared models | Best: $0.14 | |
| Output · $ / 1M tokens | $20×71.4 relative to the lowest price among the compared models | Best: $0.28 | |
| Context window | 1M | 1M | |
| Reasoning | Yes | Yes | |
| Open weights | Yes | Yes | |
| Cost / task | $10.04×56.5 relative to the lowest price among the compared models | Best: $0.178 |
Intelligence
- Claude Opus 5.5 (Max, Default Fallback)
- Best: 59.1
- DeepSeek V4 Flash 0731 (Max)
- 34.3
Coding
- Claude Opus 5.5 (Max, Default Fallback)
- —
- DeepSeek V4 Flash 0731 (Max)
- 69.1
Agentic
- Claude Opus 5.5 (Max, Default Fallback)
- —
- DeepSeek V4 Flash 0731 (Max)
- 41
Cyber Index
- Claude Opus 5.5 (Max, Default Fallback)
- 28.7%
- DeepSeek V4 Flash 0731 (Max)
- —
Speed
- Claude Opus 5.5 (Max, Default Fallback)
- 95 t/s
- DeepSeek V4 Flash 0731 (Max)
- Best: 130 t/s
TTFT
- Claude Opus 5.5 (Max, Default Fallback)
- 643 s
- DeepSeek V4 Flash 0731 (Max)
- Best: 1.62 s
Input · $ / 1M tokens
- Claude Opus 5.5 (Max, Default Fallback)
- $4×28.6 relative to the lowest price among the compared models
- DeepSeek V4 Flash 0731 (Max)
- Best: $0.14
Output · $ / 1M tokens
- Claude Opus 5.5 (Max, Default Fallback)
- $20×71.4 relative to the lowest price among the compared models
- DeepSeek V4 Flash 0731 (Max)
- Best: $0.28
Context window
- Claude Opus 5.5 (Max, Default Fallback)
- 1M
- DeepSeek V4 Flash 0731 (Max)
- 1M
Reasoning
- Claude Opus 5.5 (Max, Default Fallback)
- Yes
- DeepSeek V4 Flash 0731 (Max)
- Yes
Open weights
- Claude Opus 5.5 (Max, Default Fallback)
- Yes
- DeepSeek V4 Flash 0731 (Max)
- Yes
Cost / task
- Claude Opus 5.5 (Max, Default Fallback)
- $10.04×56.5 relative to the lowest price among the compared models
- DeepSeek V4 Flash 0731 (Max)
- Best: $0.178
Each reasoning level remains a separate configuration.
Score and cost
Each line joins the reasoning levels of a compared model; the large point marks the configuration in the table. The top-right corner holds the best score for the lowest cost. Select another point to compare that level.
- Claude Opus 5.5 (Max, Default Fallback)59.1 · $10.04
- DeepSeek V4 Flash 0731 (Max)34.3 · $0.178