OpenAI: GPT-6 Luna
Coming soonOpenAI: GPT-6 Luna is a fast and cost-effective model in the OpenAI GPT-6 series, positioned lower than GPT-6 Sol. It is suitable for high-concurrency and latency-sensitive workloads such as chat, classification, and lightweight agent tasks; at higher inference workloads, it can take on complex software engineering and computer usage tasks that previously required Sol-level models. It shares the improvements in factual reliability of the GPT-6 family, as well as a clearer, more concise communication style.
- By:
- OpenAI
- Input:
- Output:
- Context length:
- 1.05M
- Max output:
- 128K
- Published:
- 2026-09-23
This model has not been released yet — pricing and providers will appear once it is live.
Related models
More models from OpenAI
OpenAI: GPT-6 Astra1.05M contextfrom $0.5 / M tokens3 providersGPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon agentic tasks that involve computer and browser use.
OpenAI: GPT-5.6 Luna1.05M contextfrom $0.1 / M tokens2 providersGPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for its price tier.
OpenAI: GPT-5.6 Sol1.05M contextfrom $0.2 / M tokens2 providersGPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks and long-horizon problem solving.