Fable limits

Winkletter • 10 Jun 2026 •
Anthropic just unleashed their latest model Fable 5. I knew something was up when they doubled usage limits for the Claude Cowork’s 5-hour window for the rest of June. Were they preparing for Fable since it consumes limits at twice the cost of Opus 4.8? As with most new releases, they reset my limits for the week, so I have lots of tokens to burn. And apparently, it will burn a lot of tokens.
Sadly, Fable 5 is only included in the subscriptions for the next two weeks. After June 22nd, you have to use credits ($10/M input, $50/M output tokens). To be honest, I’m not sure if I have any tasks that require the supersized big brain. But it might be a good time to get a head start on an ambitious idea.
Fable 5 is essentially the Mythos model they built and had on hold, but it has strict filters on usage. If you stray too closely to the threat domains (cybersecurity and biology) it will route the request to Opus 4.8. These filters are probably going to start extra sensitive. I can already see the complaints on Twitter and Reddit.
I’ll probably have a chat with Opus first to figure out which of my projects to try.