OpenAI Brings GPT-5.6 to Kiro, Cutting Terminal-Bench 2.1 Costs by 82%
Updated
Updated · OpenAI · Aug 24
OpenAI Brings GPT-5.6 to Kiro, Cutting Terminal-Bench 2.1 Costs by 82%
3 articles · Updated · OpenAI · Aug 24
Summary
GPT-5.6 is now available in Kiro, adding OpenAI’s Sol, Terra and Luna models to workflows for planning, building, reviewing and testing software.
Kiro’s spec-driven setup feeds the models requirements, technical designs, codebase context and team standards, aiming to deliver higher-quality code with fewer iterations on long-running tasks.
Terminal-Bench 2.1 testing found GPT-5.6 Terra completed successful tasks in Kiro at roughly 82% lower cost, underscoring OpenAI’s pitch of stronger performance per dollar.
OpenAI and AWS said they have optimized both Kiro and the models already and will keep working together to improve performance across the software development lifecycle.