GPT-5.5 vs Grok 4.3
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.
GPT-5.5 vs Grok 4.3: side by side
| Spec | GPT-5.5 | Grok 4.3 | Winner |
|---|---|---|---|
| Intelligence | 50.8 | 43.9 | GPT-5.5 |
| Output speed | 60 t/s | 135 t/s | Grok 4.3 |
| Output price | $30.00/1M | $2.50/1M | Grok 4.3 |
| Context | 1050K | 1000K | GPT-5.5 |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | xAI | Tie |
GPT-5.5
Pros
- +Extremely large context window
- +Native support for files and images
- +Flexible multimodal workflows
- +Suitable for document-heavy tasks
Cons
- –No native audio or video support
- –Large context may increase latency
- –Performance depends on input quality across modalities
Grok 4.3
Pros
- +Strong performance on complex multi-step reasoning
- +Large context window for document-level tasks
- +Helpful and direct response style
- +Integrated real-time tool access
Cons
- –Vision capabilities less mature than specialized models
- –Occasional over-refusal on edge-case queries
- –High computational cost for maximum context usage
Frequently asked questions
It depends on your needs. GPT-5.5 and Grok 4.3 are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.