Key facts
- OpenAI is rolling out its GPT-5.6 AI model family.
- GPT-5.6 comes in three versions: Sol (flagship), Terra (everyday work), and Luna (speed/affordability).
- Elon Musk announced that SpaceXAI will launch its Grok 4.5 model soon.
- Grok 4.5 is described as an 'Opus-class model, but faster, more token-efficient and lower cost.'
- The announcements intensify the rivalry between OpenAI CEO Sam Altman and Elon Musk.
OpenAI is expanding the availability of its latest AI model, GPT-5.6, which comes in three distinct versions: Sol, Terra, and Luna. Sol is positioned as the flagship model with advanced capabilities in coding, biology, and cybersecurity. Terra is designed for general work tasks, while Luna focuses on speed and affordability.
This rollout follows a period of staggered releases requested by the Trump administration. The announcement was quickly followed by Elon Musk's declaration that SpaceXAI would soon launch its Grok 4.5 model. Musk described Grok 4.5 as an "Opus-class model, but faster, more token-efficient and lower cost," positioning it against Anthropic's advanced AI models.
The dueling announcements highlight the ongoing rivalry between Musk and OpenAI CEO Sam Altman. Their recent legal battle, where Musk sued OpenAI over its nonprofit status, concluded with Musk losing the case. Both companies are emphasizing efficiency and cost-effectiveness in their new models, a key consideration for businesses managing token spend.