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Advancing the price-performance frontier with GPT-5.6

By making every layer more efficient, OpenAI is delivering stronger performance per dollar across more enterprise workloads.

Advancing the price-performance frontier with GPT-5.6

TL;DR

  • GPT-5.6 Luna price reduced by 80%, GPT-5.6 Terra price reduced by 20%.
  • New 'Fast mode' for GPT-5.6 Sol in API offers up to 2.5x faster speeds at twice the price.
  • These changes aim to make AI more affordable and accessible for enterprise workloads.
  • Efficiency improvements in models, inference systems, and harness connectivity drive the cost and speed gains.
  • Luna is now the default model for background agent automations at companies like Ramp.
  • Terra and Luna are available in ChatGPT Work, Codex, and the OpenAI API.
  • API pricing changes start July 30th for Terra and Luna.