GPT 5.3 Codex
OpenAI GPT-5.3 Codex 编码专用模型，400K 上下文，针对智能体编程环境优化，支持多档推理强度，适合自动化开发任务。
- Vendor: OpenAI
- Context window: 409.6K tokens
- Official list price: input $1.75 / output $14 per 1M tokens
- Access: OpenAI-compatible API via HefuAI Platform (one key for all models)