OpenAI CEO Sam Altman announced the GPT-5.6 Sol model, part of a new model family that also includes Terra and Luna, warning users to expect “hiccups and capacity crunches” as the company attempts to scale its infrastructure to meet demand. The model delivers a 54% improvement in token efficiency for agentic coding tasks compared to prior versions. Altman described the new models as “as good or better” than competing offerings. The broader public rollout is set for July 9, 2026, following an initial limited release to trusted partners, a phased approach that came at the request of US government officials who have been working with OpenAI on safety testing. The naming overlap is noted as coincidental, as Sol, Terra, and Luna are terms with significant baggage in the crypto world, with the Terra/Luna names associated with a collapse that wiped out roughly $40 billion in value.