OpenAI Developers said they worked with AWS to optimize GPT-5.6 inside Kiro. In Kiro's spec-driven environment, GPT-5.6 Terra delivered about an 82% cost reduction per successful Terminal-Bench 2.1 task. The pairing brings Sol, Terra, and Luna into AWS's requirements-to-implementation workflow with property-based testing gates, targeting long-running software work rather than one-shot completion.

Key Takeaways

  • ✓GPT-5.6 Sol, Terra, and Luna now power AWS Kiro's spec-driven coding workflow.
  • ✓OpenAI reports ~82% lower cost per successful Terminal-Bench 2.1 task for Terra in Kiro.
  • ✓Kiro pairs specs, review checkpoints, and property-based tests for long-running agents.
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OpenAI reports ~82% lower cost per successful Terminal-Bench 2.1 task for Terra in Kiro.
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Up NextGPT-5.4 and GPT-5.4 mini leave ChatGPT-signed-in Codex today; switch to GPT-5.6 Terra and Luna
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