GPT-5.6 Soul

Fable 5 and GPT-5.6 Soul can be combined in a multi-agent workflow where Fable 5 handles planning and review while GPT-5.6 Soul executes tasks, cutting inference costs by up to 10x without sacrificing…

GPT-5.6 Soul beats Claude Fable 5 on cost and speed but falls short on creative quality, according to a comparison of the two frontier models for agentic AI workflows. The analysis recommends GPT-5.6 …

OpenAI used its GPT-5.6 Soul model to autonomously post-train a smaller model called Luna, marking a concrete example of recursive self-improvement in AI. The larger model generated training data and …