Anthropic's Claude and DeepSeek's DeepSeek, compared through their current models on the Respan Index. The strongest Claude model today is Claude Opus 5.5 (#1 on the Respan Index, 72.4); the strongest DeepSeek model is DeepSeek V4.1 Flash (#20, 50.9). Claude's best models lead in coding, agents, reasoning, knowledge and human preference.
| Category | Claude | DeepSeek |
|---|---|---|
| coding | Claude Opus 5.5 72.8 | DeepSeek V4.1 Flash 40.1 |
| agents | Claude Sonnet 5.5 78.1 | DeepSeek V4.1 Flash 61.2 |
| reasoning | Claude Opus 5.5 75.5 | DeepSeek V4.1 Flash 48.2 |
| knowledge | Claude Fable 5 72.4 | DeepSeek V4 Pro 52.6 |
| human preference | Claude Opus 5.5 60.6 | DeepSeek V4.1 Flash |
Each family's highest Respan Index category score; the higher one is bold. * Estimated: no published scores in that category. How the Respan Index works
Respan Index rank and score, blended list price per 1M tokens.
Respan Index rank and score, blended list price per 1M tokens.
The cheapest ranked Claude model is Claude Haiku 4.5 at $2 per 1M tokens blended; the cheapest DeepSeek model is DeepSeek V4.1 Flash at $0.525.