BREAKING
OpenAI Unveils GPT-5.6 Family
Sol, Terra and Luna Tiers
Sol
Flagship
●
Top performance
●
Agentic coding and cyber
Terra / Luna
Value
●
Terra: balanced, cheaper
●
Luna: fast, low-cost
TerminalBench 2.1 Results
Sol Ultra
91.9
Sol
88.8
Claude Mythos 5
88
0
$
Sol output
0
$
Terra output
0
$
Luna output
Government-Coordinated Rollout
1
~20 partners via API
↓
2
ChatGPT excluded
↓
3
GA in coming weeks
Watch for General Availability
AI NEWS BLITZ
OpenAI has revealed the GPT-5.6 family in a limited preview on June 26, 2026.