GPT-5.6 Terra and Luna models offer capability tiers optimized for balanced performance and cost-efficient inference. Terra delivers GPT-5.5-level accuracy at half the cost, while Luna targets the fastest, lowest-cost inference. Both support 1 million token context windows, enabling comprehensive code, documents, and multi-turn conversational processing.
Advanced features like prompt caching with billing discounts for repeated contexts improve efficiency for agentic workflows. The models enable complex applications such as autonomous coding agents, genomics analysis, and cybersecurity research, deployed on a next-generation inference engine with secure regional availability.
Source & further reading
OpenAI GPT-5.6 Terra and Luna now available on Amazon Bedrock in AWS GovCloud (US) ↗Source published 2026-08-24. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.