OpenAI debuted a new model naming system on June 26, 2026, using generation numbers and tier names like Sol, Terra, and Luna to replace confusing suffixes.

OpenAI debuted a new model naming system on June 26, 2026, using generation numbers and tier names like Sol, Terra, and Luna to replace confusing suffixes.

OpenAI has officially unveiled its highly anticipated GPT-5.6 model series, introducing three distinct tiers. However, the initial rollout is restricted to a select set of…