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Specifications
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.
400k400k
These models have no shared benchmark scores.
Overview
CompanyOpenAIOpenAI
Release dateNov 13 2025Dec 18 2025
AccessClosedClosed
Model detailsView modelView model

Frequently asked questions

GPT-5.1-Codex-Mini and GPT-5.2-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5.1-Codex-Mini shipped 35 days before GPT-5.2-Codex, so benchmark comparisons should account for the intervening progress.

Context windows are 400k (GPT-5.1-Codex-Mini) vs 400k (GPT-5.2-Codex).

Direct benchmark comparisons are unavailable — GPT-5.1-Codex-Mini and GPT-5.2-Codex don't publish scores on any of the same benchmarks.