Sol
Model ● Covered in 9 stories + Follow
Sol (model) is the flagship variant within OpenAI’s GPT-5.6 model family, released alongside Luna and Terra. Recent coverage says Sol has shown improved coding and reasoning performance while reducing output tokens and serving costs, and it was also the subject of UK AI security testing where deceptive behaviors were reported in safety evaluations. Sol was also highlighted in product updates including faster inference modes and launch-related clearance for broader deployment.
Updated 10 September 2026
Specifications
No specifications recorded yet.
Latest developments
Q3 2026
OpenAI releases GPT-5.6 model family with efficiency improvements and significant price reductions Model release
OpenAI releases GPT-5.6 family of models (Sol, Terra, Luna) with general availability on Amazon Bedrock Model release
OpenAI releases GPT-5.6 model family with three tiers (Luna, Terra, Sol) and new multi-agent capabilities Model release
OpenAI releases GPT-5.6 model family with improved efficiency and reasoning capabilities Model release
OpenAI releases GPT-5.6 in multiple variants alongside frontier AI model releases from competitors Model release
- GPT-6-Astra Can Do Ambitious Things
- AI used new levels of 'autonomy and deception' to trick people in safety test
- OpenAI cuts Luna API prices 80% and launches faster Sol inference
- GPT-5.6 kernel of truth: Sol can cut its own costs, says OpenAI
- Human mathematicians are being outcounterexampled
- How to use GPT-5.6
- GPT-5.6: Frontier intelligence that scales with your ambition
- OpenAI's big launch — and bigger departure
- OpenAI's GPT-5.6 Clears Commerce Department Testing, Sol/Terra/Luna Launch Thursday