Anthropic's Claude and Google's Gemini, 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 Gemini model is Gemini 4 Argon (#3, 70.3). Claude's best models lead in coding, agents and human preference; Gemini's lead in reasoning and knowledge.
| Category | Claude | Gemini |
|---|---|---|
| coding | Claude Opus 5.5 72.8 | Gemini 4 Argon 64.4 |
| agents | Claude Sonnet 5.5 78.1 | Gemini 4 Argon 75.9 |
| reasoning | Claude Opus 5.5 75.5 | Gemini 4 Argon 78.0 |
| knowledge | Claude Fable 5 72.4 | Gemini 3.1 Pro Preview 72.9 |
| human preference | Claude Opus 5.5 60.6 | Gemini 4 Argon 57.4 |
Each family's highest Respan Index category score; the higher one is bold. * Estimated: no published scores in that category.
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 Gemini model is Gemini 3.1 Flash-Lite at $0.563.