OpenAI Launches GPT-5.6
The new model family is now generally available after a limited preview.
Three Models
Sol is the flagship, Terra is balanced, and Luna is the most cost-efficient tier.
Coding Upgrade
OpenAI says GPT-5.6 Sol is its best coding model yet, with fewer tokens and faster results.
Knowledge Work
GPT-5.6 is designed to turn messy work context into polished documents, slides and spreadsheets.
Fast Model
Luna gives users and developers a lower-cost option for high-volume everyday AI tasks.
API Feature
The Responses API can let GPT-5.6 coordinate tools and keep only the useful intermediate results.
Max and Ultra
Max gives more reasoning time, while ultra coordinates multiple agents for harder work.
API Pricing
Per 1M tokens: Sol $5/$30, Terra $2.50/$15, Luna $1/$6 for input and output.
Safety
OpenAI says GPT-5.6 has layered protections, red teaming and risk-calibrated access.
User Takeaway
Use Luna for speed, Terra for daily work and Sol for the toughest high-value tasks.