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Fable 5 on Hyperagent is presented as an 'agentic' upgrade

2026-06-09 · 18:43 UTC ·@ginacostag_ ·1 min read

Brief

Fable 5 on Hyperagent is presented as an 'agentic' upgrade: according to @ginacostag_ and Hyperagent (2026-06-09), the model self-improves for hours on open-ended goals, fixes weaknesses, and delivers outputs closer to a multi-person team. Hyperagent reports noticeable gains in visual reasoning and higher-quality, sometimes lower-cost results versus Opus 4.8 across five technical test cases.

Source evidence

This is wild.

Fable 5 on Hyperagent is not just giving better answers.

It is staying with the problem, improving the work, fixing weak spots, and shipping outputs that feel closer to a full team than a chatbot.

That changes everything.

HyperagentPartner

Hyperagent (@hyperagentapp)

Fable 5 on Hyperagent is producing the most creative, ambitious work we've ever seen from our agents.

They're self-improving for hours towards open-ended goals. Visual reasoning has spiked noticeably. Outputs are consistently higher quality than Opus, occasionally at lower cost.

5 of our test cases below vs. Opus 4.8 👇

  1. Visualize all asteroids in the solar system from NASA data
  2. Design a site plan for a 100 acre fitness retreat
  3. Reconstruct Apollo control panels from technical PDFs
  4. Simulate the supply chain for World Cup jersey sales based on match outcomes
  5. Show the effects of solar flares on aurora

Fable 5 is now available on Hyperagent.

Video

— https://nitter.net/hyperagentapp/status/2064396004032463157#m