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GPT-5-Codex

openai/gpt-5-codex

OpenAI / GPT

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

Released
2025-09-15
Context window
400K
Max output
128K
Weights
Closed
Modalities
TextInputImageInputTextOutput
Capabilities
ReasoningTool callStructured
Providers
AbacusAzureAzure Cognitive ServicesHeliconeJiekou.AIKilo GatewayNanoGPTOpenCode ZenOrcaRouterPoeRequestyVercel AI GatewayZenMux

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