2026-07-12 21:20 UTCOriginal source1 min readUpdated: 2026-07-12 22:00 UTC

Fable gets another bump

Anthropic has extended access to Claude Fable 5 through July 19 due to compute constraints, as GPT-5.6 Sol emerges as a comparable model. OpenAI appears confident in maintaining GPT-5.6 access without similar restrictions. The author suggests Anthropic should make Fable permanently available to avoid losing users to OpenAI.

SourceSimon Willison's Weblog

Simon Willison’s Weblog

12th July 2026

One of the consequences of GPT-5.6 Sol being clearly a Fable/Mythos class model is that Anthropic have, once again, bumped the date that Fable stops being available in their Claude Max plans:

We're extending Claude Fable 5 access on all paid plans, as well as keeping Claude Code’s weekly rate limits 50% higher, through July 19.

As before, you can use up to half of your weekly usage limit on Fable 5. After that, you can continue using Fable 5 with usage credits, or switch to another model to keep working within your remaining limits.

Anthropic's original rationale for this was compute constraints - they wanted a better idea of both demand and compute availability before committing to keeping the new model cheap for subscribers.

OpenAI appear confident that they won't need to restrict access to GPT-5.6 in the same way.

At this point I think Anthropic should change track and keep Fable permanently available on those plans. OpenAI are winning users simply due to the uncertainty that surrounds Fable access.