GPT-5.1 Codex Max
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Context
400,000
Max output
128,000
Input / 1M
$1.10
Output / 1M
$9.00
Providers
13
01Profile
Profile
Released
2025-11-13
Last updated
2026-01
Knowledge cutoff
2024-09-30
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 13 providers
Per 1M tokens, USD. Sorted by input price. First-party row highlighted.
04History
Change history
12+ recent events since 2025-11-13
2026-08-27Removedorcarouterofferingremoved→ new
2026-08-14Addededenaioffering→ new
2026-08-06Addedofoxoffering→ new
2026-08-05Removedneonofferingremoved→ new
2026-08-04Removedrequestyofferingremoved→ new
2026-08-03Contextnano-gptContext window400,000→ new
2026-08-03Contextnano-gptMax output128,000→ new
2026-08-02ContextkiloContext window400,000→ new
2026-08-02ContextkiloMax output128,000→ new
2026-07-24Removedopenaiofferingremoved→ new
2026-07-03Addedneonoffering→ new
2026-06-06ContextvercelContext window400,000→ new