DeepSeek V4 Flash 0731 is 250.0× cheaper per million tokens (blended). Claude Opus 5 leads quality index by 5.1 points (91.2 vs 86.1). DeepSeek V4 Flash 0731 has the larger context window (1,048,576 vs 1,000,000 tokens). DeepSeek V4 Flash 0731 is open-weights; the other is not.
Claude Opus 5 vs DeepSeek V4 Flash 0731
Live catalog fields. Best-in-row is highlighted.
Claude Opus 5
Anthropic · anthropic__claude-opus-5
DeepSeek V4 Flash 0731open
DeepSeek · deepseek__deepseek-v4-flash-0731
Identity
| Field | anthropic__claude-opus-5 | deepseek__deepseek-v4-flash-0731 |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Slug | anthropic__claude-opus-5 | deepseek__deepseek-v4-flash-0731 |
| Status | live | live |
| Open weights | No | Yes |
| License | — | — |
| HuggingFace | — | deepseek-ai/DeepSeek-V4-Flash-0731 |
Quality
| Field | anthropic__claude-opus-5 | deepseek__deepseek-v4-flash-0731 |
|---|---|---|
| Quality index (0–100) | 91.2 | 86.1 |
Cost
| Field | anthropic__claude-opus-5 | deepseek__deepseek-v4-flash-0731 |
|---|---|---|
| Input $ / 1M tokens | $5.00 | $0.04 |
| Cached input $ / 1M | $0.50 | $0.02 |
| Output $ / 1M tokens | $25.00 | $0.08 |
Context
| Field | anthropic__claude-opus-5 | deepseek__deepseek-v4-flash-0731 |
|---|---|---|
| Max context tokens | 1,000,000 | 1,048,576 |
| Max output tokens | 128,000 | 943,718 |
Modalities
| Field | anthropic__claude-opus-5 | deepseek__deepseek-v4-flash-0731 |
|---|---|---|
| Input | text, image, file | text |
| Output | text | text |