MODEL SIGNAL · OPENAI
GPT-5.6 Luna
GPT-5.6 Luna is a low-latency, cost-efficient model tier optimized for high-volume classification, chat, and lightweight agentic workflows.
CATEGORYMultimodal
CONTEXT1M tokens
RELEASEDJuly 9, 2026
Key Features
- Part of the GPT-5.6 generation (alongside Sol and Terra).
- Optimized for speed and cost-efficiency in latency-sensitive tasks.
- Supports a 1,000,000 token context window.
Read the Model Signal report →
The designed Model Signal report for GPT-5.6 Luna is still in review. It will publish here after the fact and quality gates clear.