GPT-5.6 Sol Launch Confirmed for Thursday
Key Questions
When was GPT-5.6 Sol released and what models are included?
OpenAI publicly released the GPT-5.6 family on Thursday, featuring three tiers named Sol, Terra, and Luna. The launch followed resolution of government checks after a 12-day White House review involving 20 organizations.
What performance claims has OpenAI made about GPT-5.6 Sol?
Sam Altman stated that Sol uses one-third the tokens of Mythos 5 and achieves 54% token efficiency on agentic coding tasks. A direct comparison with Claude was also shared publicly by Peter Yang.
What regulatory process preceded the GPT-5.6 public launch?
The models completed 12-day testing under a voluntary AI framework at the White House gate before broad availability. This step involved evaluation by a list of 20 organizations.
OpenAI's GPT-5.6 Sol publicly released with three tiers (Sol, Terra, Luna). Government checks resolved after 12-day White House gate and 20-organization customer list. Sam Altman tweeted 'Happy building.' Claims Sol beats Mythos 5 with 1/3 tokens. Sam Altman on CNBC claims 54% token efficiency on agentic coding. Peter Yang posted a direct comparison of GPT-5.6 vs Claude. Fidji Simo steps down as COO amid launch.