BREAKING
OpenAI Previews GPT-5.6 Trio
Sol, Terra and Luna
Sol
Flagship
●
Agentic coding and cyber
●
Ultra mode runs sub-agents
Terra
Balanced
●
Everyday work
●
About 2x cheaper than 5.5
Terminal-Bench 2.1 Scores
Sol Ultra
91.9
Sol
88.8
Mythos 5
88
Fable 5
84.3
0
$
Sol output
0
$
Terra output
0
$
Luna output
Preview Held to Trusted Partners
1
Gov review
↓
2
Partner preview
↓
3
API and Codex only
↓
4
Public July 9
Public Test Awaits Release
AI NEWS BLITZ
OpenAI has opened a limited preview of three new GPT-5.6 models under U.S. government review.