AI Model Watch
Models / OpenAI

GPT-5.3-Codex

GA

Agentic coding model optimized for Codex. Reasoning effort low/medium/high/xhigh. Release date not stated on doc page. Cached-input price ($0.175) from pricing page.

Provider
OpenAI
Status
GA
Input price
$1.75 / 1M tokens
Output price
$14 / 1M tokens
Cached input
$0.175 / 1M tokens
Blended price
$4.81 / 1M tokens
Context window
400,000 tokens (400K)
Max output
128,000 tokens
Modality
text, image
Knowledge cutoff
2025-08-31
Released
—
API string
gpt-5.3-codex

Source: OpenAI official documentation ↗

See also

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