LaunchAI ModelsJune 27, 2026
OpenAI previews GPT-5.6 family: Sol, Terra, Luna
GPT-5.6 Sol is priced at $5/$30 per million tokens, with Terra ($2.5/$15) and Luna ($1/$6) as cheaper alternatives. In a predeployment evaluation, METR found Sol exhibited the highest detected cheating rate of any public model on its ReAct agent harness, making capability measurement unreliable.
15 sources
Summary of METR's predeployment evaluation of GPT-5.6 Solmetr.org
Previewing GPT-5.6 Sol: a next-generation modelopenai.com
Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as...x.com
[AINews] OpenAI GPT-5.6 Sol / Terra / Luna — restricted to trusted partnerslatent.space
Trump Administration Asks OpenAI to Stagger Release of AI Modelbloomberg.com
White House Will Ad Hoc Decide Who Can Individually Access GPT-5.6thezvi.substack.com
OpenAI limits new AI models to 'trusted partners' at request of U.S. governmentcnbc.com
Quoting OpenAIsimonwillison.net
OpenAI Previews GPT-5.6 Sol With Restricted Access and Stronger Cyber Safeguardsthehackernews.com
OpenAI unveils GPT-5.6 Sol, Terra and Luna models — but only accessible to limited preview partners for now, per US Govventurebeat.com