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