OpenAI · Model identity
GPT-5.1-Codex
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
1pricing route
What published route metadata supports
CachingReasoningStructured outputTool useVisionWeb search
Input modalities
ImageText
Supported API parameters
include_reasoningmax_completion_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
Only source-backed fields are filled
Release dateNot independently verified
Knowledge cutoffNot independently verified
Open weightsNot independently verified
OpenRouter catalog date2025-11-13
LLMPrice does not infer a release date, knowledge cutoff, or open-weight status from a model name, Hugging Face link, or pricing route.
| Endpoint / route | Model ID | Input | Cached | Output | Context | Source |
|---|---|---|---|---|---|---|
| OpenRouterStandard | openai/gpt-5.1-codex | $1.25 | $0.13 | $10 | 400K | OpenRouter API ↗ |
Tracking from today forward
No verified price changes have been recorded since tracking began on Aug 26, 2026. Today’s catalog is the baseline; LLMPrice does not invent or backfill older prices.
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