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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.
—400k
These models have no shared benchmark scores.
Overview
CompanyGoogleOpenAI
Release dateOct 28 2026Sep 15 2025
AccessClosedClosed
Model detailsView modelView model

Frequently asked questions

Gemini 4 Carbon and GPT-5-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5-Codex shipped 408 days before Gemini 4 Carbon, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — Gemini 4 Carbon and GPT-5-Codex don't publish scores on any of the same benchmarks.