Claude Sonnet 4.5 vs Gemini 2.5 Pro
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Claude Sonnet 4.5 vs Gemini 2.5 Pro: side by side
| Spec | Claude Sonnet 4.5 | Gemini 2.5 Pro | Winner |
|---|---|---|---|
| Intelligence | — | 34.6 | Tie |
| Output speed | — | 144 t/s | Tie |
| Output price | $15.00/1M | $10.00/1M | Gemini 2.5 Pro |
| Context | 1000K | 1049K | Gemini 2.5 Pro |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | Anthropic | Tie |
Claude Sonnet 4.5
Pros
- +Strong safety alignment
- +Reliable handling of large contexts
- +Careful and detailed reasoning
- +Effective multimodal file support
Cons
- –Can be overly cautious with refusals
- –Vision performance varies by image complexity
- –May produce verbose responses
Gemini 2.5 Pro
Pros
- +Very large context window for extended inputs
- +Native support for multiple modalities in one model
- +Strong integration of text with visual and audio data
- +Effective handling of complex, multi-part files
Cons
- –Higher latency on very large multimodal inputs
- –Performance can vary with extremely long contexts
- –Dependent on Google infrastructure for access
Frequently asked questions
It depends on your needs. Claude Sonnet 4.5 and Gemini 2.5 Pro are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.