GPT-5.1-Codex vs Grok 4.20 Multi-Agent
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-5.1-Codex vs Grok 4.20 Multi-Agent: side by side
| Spec | GPT-5.1-Codex | Grok 4.20 Multi-Agent | Winner |
|---|---|---|---|
| Intelligence | 43.1 | — | Tie |
| Output speed | 178 t/s | — | Tie |
| Output price | $10.00/1M | $6.00/1M | Grok 4.20 Multi-Agent |
| Context | 400K | 2000K | Grok 4.20 Multi-Agent |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | xAI | Tie |
GPT-5.1-Codex
Pros
- +Strong performance on extended coding workflows
- +Effective integration of visual context with code
- +Handles very large inputs without losing coherence
- +Specialized for software development tasks
Cons
- –Limited to text and image inputs only
- –High computational cost for maximum context
- –May require careful prompt engineering for complex tasks
Grok 4.20 Multi-Agent
Pros
- +Supports extremely long contexts
- +Coordinates multiple agents for workflows
- +Handles text, images, and files natively
Cons
- –Multi-agent setups may add latency
- –Coordination overhead on simple tasks
- –No audio or video modalities
Frequently asked questions
It depends on your needs. GPT-5.1-Codex and Grok 4.20 Multi-Agent are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.