Anthropic's Fable 5 model is available again, and plenty of users are upset about the tighter limits that came with it. Here's why AI coding is evolving yet again. Launched on 9 June, Fable 5 is a new flagship model that Anthropic says is especially suited to software engineering, long-horizon reasoning, and other complex tasks. I tried it when it first came out, and it was phenomenal, though it did sponge up 2.5 million tokens in 30 minutes flat.