First look at GPT-5

Introducing GPT-5.1 for developers

GPT-5. 1 is now available in the API, bringing faster adaptive reasoning, extended prompt caching, improved coding performance, and new apply_patch and shell tools.

Introducing GPT-5 for developers

Introducing GPT-5 in our API platform—offering high reasoning performance, new controls for devs, and best-in-class results on real coding tasks.

Introducing GPT-5.5

Introducing GPT-5. 5, our smartest model yet—faster, more capable, and built for complex tasks like coding, research, and data analysis across tools.

Introducing GPT-5.4

Introducing GPT-5. 4, OpenAI’s most most capable and efficient frontier model for professional work, with state-of-the-art coding, computer use, tool search, and 1M-token context.

Inside JetBrains—the company reshaping how the world writes code

JetBrains is integrating GPT-5 across its coding tools, helping millions of developers design, reason, and build software faster.

Coding and design with GPT-5

Learn how GPT-5 unlocks new possibilities in coding and design.

Customizing GPT-3 for your application

Fine-tune with a single command.

GPT-3.5 Turbo fine-tuning and API updates

Developers can now bring their own data to customize GPT-3. 5 Turbo for their use cases.

Improving GPT‑5.6 Sol in ChatGPT—and expanding access to GPT-5.6 Luna for free users

ChatGPT introduces improved GPT-5. 6 Sol with better accuracy and consistency, plus expanded access for free users and unlimited everyday chats with GPT-5.

Introducing the GPT Store

Introducing GPT-5.2

GPT-5. 2 is our most advanced frontier model for everyday professional work, with state-of-the-art reasoning, long-context understanding, coding, and vision.

Introducing GPT-4.1 in the API

Introducing GPT-4. 1 in the API—a new family of models with across-the-board improvements, including major gains in coding, instruction following, and long-context understanding.