GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
With CoreAI, you can start chatting with OpenAI: GPT-5.2-Codex instantly — no separate subscription needed. CoreAI lets you chat with OpenAI: GPT-5.2-Codex alongside 300+ other AI models from OpenAI and other providers like OpenAI, Anthropic, Google, Meta, and more.
Among the 392 chat models on CoreAI, OpenAI: GPT-5.2-Codex ranks #128 by context window — 400K tokens, roughly 300,000 words or 600 pages of text in a single conversation. On price, it is the #1 cheapest of 64 premium-tier models by input cost. It joined the catalog on 2026-01-14. It supports step-by-step reasoning (thinking mode) and accepts image input.
Every model in this table is available on CoreAI — open the web app and run the same prompt through OpenAI: GPT-5.2-Codex and OpenAI: GPT-5.3-Codex side by side to judge with your own eyes.
A typical question (about 1,000 tokens in, 500 out) runs $0.00875 on OpenAI: GPT-5.2-Codex's raw per-token rates; a heavy session with a 50K-token document costs about $0.158. On CoreAI you don't juggle these numbers — one subscription covers OpenAI: GPT-5.2-Codex and 300+ other models under a plan usage limit, with no API keys. See plans.
OpenAI: GPT-5.2-Codex handles 400K tokens of context — roughly 300,000 words, or about 600 pages of text in one conversation.
OpenAI: GPT-5.2-Codex's underlying rates are $1.75 per 1M input tokens and $14 per 1M output tokens. On CoreAI it is included in one subscription alongside 300+ models, so there is no per-token billing to manage.
Yes — OpenAI: GPT-5.2-Codex accepts image input, so you can attach screenshots, photos or diagrams and ask questions about them.
Yes. OpenAI: GPT-5.2-Codex can work through problems step by step before answering; on CoreAI you can toggle thinking mode per message.
Open the CoreAI web app or the iOS/Android app, pick OpenAI: GPT-5.2-Codex in the model selector, and chat — no API key, no per-token billing. One subscription covers OpenAI: GPT-5.2-Codex and 300+ other models.
The closest alternatives on CoreAI are OpenAI: GPT-5.3-Codex, Anthropic: Claude Opus 4.5, inclusionAI: Ling-2.6-flash — similar tier and capability. The fastest way to choose is running one prompt through them side by side in CoreAI's Compare view.
Chat with OpenAI: GPT-5.2-Codex and 300+ other AI models — all in one app.