Overview
- OpenAI will publicly release the GPT‑5.6 family — Sol, Terra and Luna — on Thursday and is expanding preview access globally through its API ahead of a wider ChatGPT rollout.
- U.S. officials approved the broad deployment after additional technical testing and meetings with OpenAI, reversing an earlier request that limited access to a small set of vetted U.S. partners.
- GPT‑5.6 is sold as three tiers: Sol is the flagship for hard tasks such as complex coding and cybersecurity, Terra is a midrange option priced at about half the cost of GPT‑5.5, and Luna is a fast, low‑cost model for routine work.
- Anthropic’s Mythos 5 and Fable 5 were disabled following a U.S. export‑control order in June and have been partially restored, but Mythos remains available only to selected, vetted U.S. organizations for cybersecurity uses.
- The episode tightens U.S. oversight of frontier models and could fragment global access, boost demand for lower‑cost foreign alternatives, and influence how firms handle product rollouts, customer vetting and planned IPO valuations.