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GPT-5.3 Codex

gpt-codex

Coding-optimized GPT model for repository edits, reviews, and agentic software work

Family
gpt-codex
Providers
22
Context
400,000
Output
128,000
Knowledge
2025-08-31
Weights
Closed
Input
textimagepdf
Output
text
Release date
2026-02-05
Updated
2026-02-05

Providers

Source: models.dev