Got access to GPT 5.6 Sol Ultra, compared to Fable 5

A user compared GPT 5.6 Sol Ultra to GPT 5.5 and Fable 5, noting significant improvements. GPT 5.6 Sol Ultra is described as more autonomous and faster, especially with its 1.5x speed mode. In a project review, it identified more errors and demonstrated a better understanding than Fable 5. The user also highlighted its exceptional browser capabilities, finding and fixing additional bugs on a website.