OpenAI: GPT-5.3-Codex

The OpenAI GPT-5.3-Codex is an advanced AI model capable of handling text, images, and files, with a context length of 400,000 tokens and robust support for reasoning and tools. While it excels in various input modalities and includes capabilities like structured output, the lack of open weights means its inner workings remain proprietary. This model should be considered by those needing comprehensive AI solutions that can process diverse inputs; however, with a blended benchmark score of 74.7 across multiple independent tests, it stands as a strong contender but might not outshine models with higher scores in specialized tasks. Its pricing at $1.75 per million input tokens and $14.0 per million output tokens makes it accessible for larger projects, though its cost may be prohibitive for smaller budgets or frequent users.