GPT-4o vs GPT-5 Codex

Detailed comparison of capabilities, features, and performance.

Feature
GPT-4o
GPT-5 Codex
Model Image
GPT-4o
GPT-5 Codex
AI Lab
OpenAI
OpenAI
Context Size
128,000 tokens
400,000 tokens
Max Output Size
4,096 tokens
128,000 tokens
Frontier Model
Yes
Yes
Vision Support
Yes
Yes
Description
The Omni model from OpenAI that reasons across audio vision and text
OpenAI's specialist coding model.

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