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OpenAI

Is GPT-5.6 Luna out? Yes, since July 9, 2026

Yes. GPT-5.6 Luna was released on July 9, 2026.

A browser notification for each confirmed release in this family. No account or email.

Have you used it? GPT-5.6 Luna

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Lab
OpenAI
Family
GPT
Release date
Source
OpenAI · GPT-5.6

What changed

  • context 1.05M tokens · Context window of GPT-5.6 Luna. GPT-5.5 is the previous model of the same tier, but the gap is beyond what a percentage explains.
  • price -96 % · Prompt price compared with GPT-5.5, same tier in this family. Went from $5.00 / MTok to $0.200 / MTok. Lower is better.

About GPT-5.6 Luna

GPT-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...

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Questions

When was GPT-5.6 Luna released?
GPT-5.6 Luna was released on July 9, 2026.
Who makes GPT-5.6 Luna?
GPT-5.6 Luna is made by OpenAI.
What comes after GPT-5.6 Luna?
GPT-6 Astra, released on September 3, 2026.