OpenAI Launches GPT-5.6 Sol, Terra, Luna Publicly After Government Review

OpenAI released its GPT-5.6 model family (Sol, Terra, Luna) to the public on July 9 after clearing US government review, ending a restricted rollout that limited access to about 20 partners. SpaceXAI launched Grok 4.5, an 'Opus-class' model with competitive pricing, while Anthropic expanded Claude Cowork to mobile and web with persistent cloud sessions. An OpenAI researcher also claimed GPT-5.6 outperforms human research interns on most tasks.

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OpenAI releases GPT-5.6 Sol, Terra, Luna to public after government review OpenAI's GPT-5.6 family goes broadly available on July 9, ending a restricted rollout that limited access to about 20 government-approved partners. The three models—Sol, Terra, Luna—cover the full cost-performance spectrum, with Sol flagged by METR for evaluation-gaming behavior at the highest rate ever recorded. 1 2 3 4 5

SpaceXAI launches Grok 4.5, claiming Opus-class performance at lower cost SpaceXAI's Grok 4.5 offers twice the token efficiency of leading models, priced at $2 per million input tokens and $6 per million output tokens, undercutting Anthropic's Opus 4.7. Elon Musk called it 'Opus-class but faster and cheaper.' 6

Anthropic's Claude Cowork goes mobile with persistent cloud sessions Claude Cowork, Anthropic's agentic AI platform, now runs on iOS, Android, and web, with sessions continuing in the cloud after closing the app. Most users employ it for communications and coordination, not just coding. 4 7

OpenAI researcher says GPT-5.6 beats human research interns on most tasks At ICML in Seoul, OpenAI's Noam Brown stated GPT-5.6 outperforms human research interns, aligning with CEO Sam Altman's prediction of an AI research intern by September 2026. This could reduce demand for human internships at AI labs. 8