Anthropic obvioudsly no longer operate on a classic annual model-release cycle.

Major generations may still arrive roughly once a year, but meaningful frontier upgrades now appear every two to four months.

Claude 4 launched in May 2025. Opus 4.1 followed roughly ten weeks later. If Fable 5 follows a similar cadence after its June 2026 release, a potential Fable 5.1 would most likely land around August or September.

It's crazy to think how good Fable 5 is, and that we'll probably get the next iteration next month. Rumor has it Fable 5.1 is already finished. It's hard to imagine what else is in store for us.

Again: we are still so early.