OpenAI launches GPT-5.6 with Sol, Terra, and Luna models

GPT-5.6 Sol achieves 7.8% on ARC-AGI-3, a new SOTA. The launch includes three tiers: Sol (complex agentic), Terra (balanced), and Luna (fast). GPT-5.6 powers ChatGPT Work and integrates with Microsoft 365 Copilot, Perplexity, and Framer.