2026-06-26June 26, 2026milestoneMilestone
GPT-5.6 (Sol, Terra, Luna) debuts through a government-coordinated preview
OpenAI's next family — flagship Sol at $5/$30, Terra matching GPT-5.5 at half the cost, Luna for volume — spends two weeks restricted to government-approved partners before its July 9 GA. A frontier coding model arriving via managed rollout marks how much the policy environment hardened in 2026.
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