OpenAI is set to begin rolling out its latest family of AI models — GPT-5.6 Sol, Terra and Luna — from July 9, bringing smarter reasoning, better coding abilities, faster responses and stronger safety features to ChatGPT users and developers.

The three models are designed for different kinds of users, ranging from those who need the most advanced AI for research and programming to those looking for a faster, lower-cost assistant for everyday tasks.

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Three AI models, three different purposes

Instead of releasing just one model, OpenAI stated in its June blog post that it has introduced a family of three.

GPT-5.6 Sol is the most powerful version, built for complex tasks like research, software development and solving multi-step problems.

GPT-5.6 Terra is aimed at everyday work — writing, analysing documents, brainstorming ideas and coding. OpenAI says it delivers similar performance to GPT-5.5 but at about half the cost.

GPT-5.6 Luna is the fastest and cheapest model, making it suitable for quick conversations, summaries and routine tasks.

GPT 5.6 can "think" longer before answering

According to OpenAI, one of the biggest changes is that GPT-5.6 can spend more time working through difficult questions instead of rushing to an answer.

For example, if you're asking it to analyse a long report, debug complicated code or solve a multi-step problem, the model can reason through the task more carefully before responding.

OpenAI has also introduced an "Ultra" mode, where multiple AI agents work together behind the scenes on complex requests. It is similar to assigning different parts of a project to different teammates before combining the results.

Better for programmers and more helpful for everyone else

While GPT-5.6 includes major improvements for software developers, those upgrades could also benefit regular users.

The models are said to be better at understanding long instructions, spotting mistakes, fixing errors and handling complicated workflows. That means they should be more reliable whether you're writing code, analysing spreadsheets, planning projects or drafting documents.

OpenAI says GPT-5.6 is also better at analysing scientific data, particularly in biology and genetics.

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Stronger at finding security flaws but with tighter guardrails

Another major upgrade is cybersecurity.

OpenAI says GPT-5.6 is better at helping developers identify software vulnerabilities, review code and suggest fixes before attackers can exploit them.

At the same time, the company says it has strengthened safeguards to prevent the AI from being misused for cyberattacks. According to OpenAI, the models are designed to assist defensive security work while refusing requests that could enable harmful activity.

More safety checks built in

OpenAI adds that GPT-5.6 comes with its most advanced safety system yet.

The company says it spent weeks stress-testing the models and used both human experts and AI systems to look for weaknesses before release. If a request appears risky, the model can pause, review the context and refuse to generate harmful responses.

Rollout begins July 9

The new models will start rolling out from July 9, with access expanding gradually across ChatGPT, Codex and OpenAI's API.