GPT-5.6 Sol, Terra, and Luna
### TL;DR
OpenAI introduces the GPT-5.6 series of large language models (LLMs). The GPT-5.6 series introduces a new tiered naming system designed to give developers and users clearer choices, balancing intelligence, speed, and cost. GPT-5.6 Sol: The flagship model. It is the most capable model yet, featuring advanced agentic capabilities, deep reasoning (with a new max reasoning effort and ultra mode), and top-tier performance in coding, biology, and cybersecurity. GPT-5.6 Terra: The balanced model. It delivers everyday performance competitive with GPT-5.5, but at half the cost. GPT-5.6 Luna: The lightweight model. It is the fastest and most affordable option in the lineup, bringing strong capabilities at the lowest price point.
Key Insights & Metrics
Key Features
- Enhanced reasoning capabilities
- Improved context understanding
- Optimized for AI agent applications
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