Flagship Capability: Sol

Sol is the apex of the GPT-5.6 family. Beyond standard text and omni-modal inputs, Sol introduces the Ultra setting for extreme multi-agent orchestration.

The Ultra Setting

When you enable ultra: true in the API, Sol automatically provisions parallel sub-agents to tackle complex, multi-step goals. Instead of generating a single output sequentially, it breaks the task into a dependency graph and solves pieces simultaneously.

const response = await openai.responses.create({
  model: "gpt-5.6-sol",
  ultra: true, // Enables parallel sub-agent reasoning
  input: "Draft a comprehensive security audit for this Python codebase."
});

Safety & Government Review

Because of Sol's advanced capabilities in cybersecurity and coding, its release was subject to unprecedented review coordinated with the U.S. government. It features OpenAI's most robust safety stack to date, specifically hardening it against jailbreaks in high-risk environments.