GPT-5.3 Codex (xhigh)

Output quality

OpenAI 将其描述为面向智能体编程的模型，并允许 low、medium、high、xhigh 推理 effort；官方型号页未提供此处可引用的任务通过率或与同测竞品的质量对照，故仅据其明确任务定位描述，不作更广泛的代码质量保证。

Pricing

Public API price (source-reported)

$1.75 / $14 per 1M tokens (input / output)

• Input：Above the comparable board median（$0.65）
• Output：Above the comparable board median（$3.625）

Good fit for

• • Codex 或相似环境中的智能体编程
• • 通过 Responses API 执行编程工作流

Multimodal, suited to combined-content tasks such as Inputs: Text and Image; Outputs: Text, Code, and Tool calls.

Strengths & limitations