Model comparison
Gemini 3.1 Pro vs Claude Opus 4.8
Gemini 3.1 Pro
Google's latest frontier model with expanded reasoning.
Anthropic
Claude Opus 4.8
Anthropic's heavyweight for hard reasoning and agentic work.
Specs
| Metric | Gemini 3.1 Pro | Claude Opus 4.8 |
|---|---|---|
| Context window | 1.0M tokens↑ | 1M tokens |
| Input $/1M tokens | $2.00↑ | $5.00 |
| Output $/1M tokens | $12.00↑ | $25.00 |
| Modalities | Audio · File · Image · Text · Video | Text · Image |
| Open weights | No | No |
| Released | Feb 2026 | May 2026 |
Key differences
- -Gemini 3.1 Pro offers 1.0M context; Claude Opus 4.8 offers 1M.
- -Input pricing: Gemini 3.1 Pro at $2.00/1M vs Claude Opus 4.8 at $5.00/1M.