
The Stack
OpenAI brings GPT-5.6 to Kiro in a push for cheaper AI coding
OpenAI has been pushing price-performance harder than any headline about its models suggests, and tonight's update is the clearest signal yet. The GPT-5.6 family — Sol, Terra, and Luna — is now live in Kiro, OpenAI's software-development agent, in a partnership with AWS aimed squarely at cutting what AI-native coding costs. The GPT-5.6 family is now available in Kiro, OpenAI's AI coding agent, in a joint push with AWS to cut development costs.










