GPT-5.3 Codex
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Context
400,000
Max output
128,000
Input / 1M
$2.19
Output / 1M
$17.50
Providers
1
01Profile
Profile
Released
2026-02-24
Last updated
2026-06-11
Knowledge cutoff
2025-08-31
Weights
Closed
02Capabilities
Capabilities
Input
text · image
Output
text
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Attachments
Yes
Cache read
—
Cache write
—
03Pricing
Pricing across 1 providers
Per 1M tokens, USD. Sorted by input price. First-party row highlighted.
04History
Change history
5+ recent events since 2026-02-24
2026-06-10ContextveniceContext window400,000→ new
2026-06-10ContextveniceMax output128,000→ new
2026-03-12ContextveniceMax output131,072→ 128,000
2026-02-26ContextveniceMax output100,000→ 131,072
2026-02-24Addedveniceoffering→ new