Kiro: Generally Available: Claude Opus 5.5, GPT-5.6 Sol

October 30, 2026 Generally Available: Claude Opus 5.5, GPT-5.6 Sol Claude Opus 5.5 and GPT-5.6 Sol are generally available with full Kiro support. Expanded capacity supports more dependable access for production workloads. Their current plans, regions, surfaces, context windows, credit multipliers, and inference scopes remain unchanged. Both models' Experimental labels no longer apply. The Kiro Excluded Models indemnity exception also no longer applies to these models. To load the latest model list, restart the IDE or CLI, run kirocrew restart for Crew, or refresh Web in your browser. Learn more -> { PREVIOUS } OpenAI GPT-5.6 Sol, Terra, and Luna now available { NEXT } GPT‑5.6 update: lower credit multipliers for Terra and Luna