Introducing GPT-6 Sol and Luna

GPT-5.6: Frontier intelligence that scales with your ambition

More intelligence from every token, stronger performance per dollar, and more capability on demand for your hardest work.

How GPT-5.6 fuses frontier intelligence with frontier efficiency

GPT-5. 6 improves AI efficiency across models, inference, and agentic workflows, helping deliver more useful intelligence per dollar.

Advancing the price-performance frontier with GPT-5.6

Explore lower GPT‑5. 6 pricing for Luna and Terra—and how OpenAI’s more efficient models help enterprises deploy AI workflows at scale.

Gemini 3.5: frontier intelligence with action

Gemini 3. 5 is built to help you execute complex, agentic workflows.

GPT-6 Astra: The next generation in intelligence for work

OpenAI introduces GPT‑6 Astra, its most capable model for business. The new model boasts advanced reasoning, computer use, and improved writing and design judgment. It is positioned as the next generation of intelligence for work.

Gemini 4 Argon: our next era of frontier intelligence

Introducing GPT-6.1 Sol

OpenAI introduces GPT‑6.1 Sol, a new model described as near‑Astra intelligence for coding, computer use, and professional work. It offers these capabilities at one‑fifth of Astra’s standard API input and output token prices, implying a more cost‑effective solution for developers and businesses.

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.

Replit expands access to software creation with GPT-5.6 Luna

Replit has launched a new Free Mode that utilizes GPT‑5.6 Luna, allowing users to transform ideas into functional software without incurring token costs. This feature expands access to software creation by removing financial barriers for developers and hobbyists. The integration of GPT‑5.6 Luna provides a powerful, cost‑free tool for building applications directly within Replit’s platform.

Introducing GPT-5.3-Codex

GPT-5. 3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work.

A model guide for the GPT-6 family

The article explains how startups can select GPT‑6 models and adjust their reasoning effort. It offers guidance on improving prompts and skills, coordinating tools, and preparing production workflows.

GPT-6 Astra: A new generation of intelligence

OpenAI introduces GPT‑6 Astra, positioning it as the most intelligent and aligned model to date. The new model boasts state‑of‑the‑art capabilities in computer use, coding, cybersecurity, and science. It represents a significant step forward in AI performance and alignment.