Agentic Chat (GPT-5.3 Codex)
duo-chat-gpt-5-3-codex
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Specification
most-agreed values
Context
400K
Max output
128K
Released
2026-02-05
Knowledge cutoff
2025-08-31
Retires
—
Open weights
no
Input
text, image, pdf
Output
text
Price
US dollars per million tokens · most-agreed
Input
free
Output
free
Available from 1 host
| Host | In $/M | Out $/M | Cache rd | Cache wr | Context | Output | Retires |
|---|---|---|---|---|---|---|---|
| gitlab | free | free | — | — | 400K | 128K | — |