The GPT-5.6 lineup includes three models designed for different workloads. GPT-5.6 Sol is the flagship model focused on coding, knowledge work, cybersecurity, scientific research, and complex reasoning tasks. GPT-5.6 Terra is designed as a balanced model for everyday workloads, while GPT-5.6 Luna targets faster and lower-cost usage.
| Model | Positioning |
|---|---|
| GPT-5.6 Sol | Flagship model for advanced reasoning, coding, science, cybersecurity, and knowledge work |
| GPT-5.6 Terra | Balanced model for everyday tasks |
| GPT-5.6 Luna | Faster and more affordable model |
GPT-5.6 introduces additional reasoning options for complex workflows. The max setting provides more compute time to explore alternatives, run checks, and refine responses. The ultra setting coordinates four AI agents in parallel by default, allowing them to work on different parts of a task simultaneously.