GPT-5.6 Ships Three Models, Slashes Prices, and Absorbs Codex Into ChatGPT
GPT-5.6's pricing resets the cost floor for frontier coding models, and the Codex-ChatGPT merger turns the desktop agent into a single surface that spans code, PR review, and one-click site deployment. Standalone AI-site platforms now compete with a built-in, hosted alternative inside the tool developers already use.
The GPT-5.6 family launches with three models: Sol for the hardest reasoning and long-running coding tasks, Terra and Luna as cheaper workhorses. Pricing is set to directly attack Anthropic: Sol costs half of Claude's Fable 5 Extra High and one-third of Fable 5 Max. Anthropic responded within hours by resetting Claude Code usage quotas.
The Codex desktop app has been absorbed into ChatGPT. Its icon, name, and interface now read "ChatGPT," and the two products share a unified UI with a Codex mode and a Work mode. New capabilities include in-app Markdown editing, sidebar GitHub PR review, multi-repo project support, and mobile access to desktop projects.
A new Sites feature lets ChatGPT generate, preview, iterate, and deploy websites or web apps to a live URL with access controls — a direct threat to standalone AI-site builders like v0.dev and bolt.new. Plus users get 15–90 messages per five hours on Sol, 20–110 on Terra, and 50–280 on Luna, with actual consumption varying by reasoning intensity and task complexity.
OpenAI is no longer just competing on benchmark scores; it is using aggressive pricing to make Claude economically unviable for high-volume coding workloads.
Folding Codex into ChatGPT signals that the standalone coding-agent category is collapsing into the primary AI chat surface, which raises the stakes for any company trying to sell a separate developer agent.
The Sites feature turns ChatGPT into a hosting provider, which undercuts Vercel-adjacent AI builders by removing the step of connecting an external deployment pipeline.