OpenAI: GPT-5.3-Codex

The OpenAI GPT-5.3-Codex is a large language model that supports multiple input modalities, including text, image, and file inputs. It can handle context lengths of up to 400,000 tokens and provides completion outputs with up to 128,000 tokens. This model may be suitable for users who need to integrate tools or support complex reasoning within their applications, as it is designed to do so. However, its price point is relatively high at $1.75 per million input tokens and $14.0 per million output tokens. Compared to other models with similar benchmark scores, the GPT-5.3-Codex's price may be a significant consideration for those on a budget or who require more cost-effective solutions.