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GPT-5.1 Codex

openai/gpt-5.1-codex

OpenAI / GPT

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Codex GPT for repository edits, code review, and practical software agents

Released
2025-11-13
Context window
400K
Max output
128K
Weights
Closed
Modalities
TextInputImageInputTextOutput
Capabilities
AttachmentsReasoningTool callStructured
Providers
AbacusAIHubMixAzureAzure Cognitive ServicesCloudflare AI GatewayHeliconeJiekou.AIKilo GatewayLLM GatewayNanoGPTOpenCode ZenOpenRouterOrcaRouterPoeRequestyVercel AI GatewayVivgridZenMux

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