OpenAI’s GPT-5.6 model family is now available inside Kiro, the spec-driven development environment built by Amazon Web Services. The August 24, 2026 announcement puts all three members of OpenAI’s current flagship series — Sol, Terra, and Luna — into the tool AWS pitches as its answer to prompt-and-iterate coding assistants, with the two companies reporting that joint testing on Terminal-Bench 2.1 cut the cost of completed tasks by roughly 82%. The integration covers the full range of Kiro…