Anthropic is offering access to Claude Fable 5 at no extra cost until July 12. The promotion is available on Pro, Max, Team, and premium seats on seat-based Enterprise plans. Up to 50% of users' weekly subscription limits can be used on Claude Fable 5 during the promotional period. After reaching the limit, users can continue using Fable 5 with usage credits or switch to another model and keep working within their remaining limits.