GPT-5.3-Codex vs GPT-5.4 Nano
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-5.3-Codex vs GPT-5.4 Nano: side by side
| Spec | GPT-5.3-Codex | GPT-5.4 Nano | Winner |
|---|---|---|---|
| Intelligence | 53.6 | 44 | GPT-5.3-Codex |
| Output speed | 98 t/s | 147 t/s | GPT-5.4 Nano |
| Output price | $14.00/1M | $1.25/1M | GPT-5.4 Nano |
| Context | 400K | 400K | Tie |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | OpenAI | Tie |
GPT-5.3-Codex
Pros
- +Specialized for programming workflows
- +Extensive context handling
- +Support for diverse input types
Cons
- –Narrower focus than general-purpose models
- –Performance tied to input quality
GPT-5.4 Nano
Pros
- +Very large 400k token context
- +Handles file, image, and text inputs
- +Multimodal flexibility
Cons
- –Nano size may limit depth on complex tasks
- –No audio or video modalities
Frequently asked questions
It depends on your needs. GPT-5.3-Codex and GPT-5.4 Nano are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.