Introducing GPT-6 Sol and Luna
What changed
Meet GPT-6 Sol and Luna, two models that bring frontier intelligence to everyday work with different balances of capability and cost.
Why it matters
A concrete addition to Practical AI: Tools, Models & Frameworks: it changes what's available to builders today rather than being general commentary.
How it compares
Related prior coverage to compare against:
- Improving GPT‑5.6 Sol in ChatGPT—and expanding access to GPT-5.6 Luna for free users
- Replit expands access to software creation with GPT-5.6 Luna
- Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed
Sources
- Introducing GPT-6 Sol and Luna (openai-blog)primary