GPT-5-Codex
openai/gpt-5-codex
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Capabilities
ReasoningYes
Tool callingYes
Structured outputYes
TemperatureFixed
AttachmentNo
Open weightsNo
Limits
Context400,000 tokens
Max input272,000 tokens
Max output128,000 tokens
Details
Familygpt-codex
Knowledge cutoff2024-09-30
Release date2025-09-15
Last updated2025-09-15
Modalities
Inputtext, image
Outputtext
Benchmarks
Artificial Analysis Coding Index
38.9
index
SciCode
40.9
percent correct
Terminal-Bench Hard
37.9
success rate
Community Rating
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Pricing
Cost per 1M tokens
InputN/A
OutputN/A