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Dan McAteer predicts GPT-5.6 will ship and Fable will return the week of June 28…

2026-06-28 · 15:45 UTC ·@daniel_mac8 ·0 min read

Brief

Dan McAteer predicts GPT-5.6 will ship and Fable will return the week of June 28, 2026, citing Axios that export controls on Fable could be lifted immediately and won’t favor Anthropic over OpenAI. He argues Fable is most capable but slow and costly, while GPT-5.6 Sol is nearly as strong, 40% cheaper per output token, and may have aided solving the Erdős problem.

Why it matters

Dan McAteer predicts GPT-5.6 will ship and Fable will return the week of June 28, 2026, saying Axios reports the government may lift export controls on Fable “as soon as this week” and is unlikely to favor Anthropic over OpenAI.

Key details

  • McAteer claims Fable is currently the most capable model but is slow and expensive; GPT-5.6 (Sol) is nearly as capable, far more efficient, and its output tokens cost 40% less than Fable's.
  • He notes community speculation that GPT-5.6 Sol helped crack the Erdős unit-distance problem and emphasizes the value of using Fable and GPT-5.6 Sol together, quipping “The Singularity is delayed by two weeks.”
Source evidence

The Singularity is delayed by two weeks. It's nothing from the perspective of eternity.

Dan McAteer (@daniel_mac8)

My prediction: GPT-5.6 ships and Fable returns this week.

Axios reports the government will lift export controls on Fable as soon as this week, and they're unlikely to favor Anthropic over OpenAI.

Fable is the most capable model we have. It's also slow and expensive.

GPT-5.6 looks nearly as capable and far more efficient. Its output tokens cost 40% less than Fable's.

Some think GPT-5.6 Sol is the model that cracked the Erdős unit-distance problem. No slouch.

The exciting part is using Fable and GPT-5.6 Sol together.

Maybe this week, you can.

— https://nitter.net/daniel_mac8/status/2071201753186345045#m