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OpenAI Unveils GPT-5.6 Lineup, Limits Preview at Government's Request

  • Foundation Models
  • AI Agents
  • Policy & Regulation

OpenAI on June 26, 2026 announced its new GPT-5.6 family of foundation models, opening a limited preview that, at the U.S. government's request, initially restricts access to a few dozen trusted domestic partners. The lineup comprises the flagship "Sol," the balanced, everyday-workload "Terra," and the fast, low-cost "Luna." A general release is expected "within weeks."

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