Anthropic always talks about how incredible Claude Fable and Claude Mythos are, and marketing is the biggest reason for the company to advertise them so much.

In September 2026, Anthropic released Claude Fable 5.1. It is their latest model for coding and knowledge work, and they claim that by reducing cache read prices by 75%, typical usage costs will drop by about 25%,

It's only the first day of September 2026, but the month and fall season are already off to the races in AI land, as Anthropic has just released its latest and most powerful large language models yet — Claude Fable 5.1 and Claude Mythos 5.1. The two ...

Anthropic's AI Claude was reportedly down for thousands of users on September 21 with many complaining online.

Opus 5.5 (the new default model released on September 22), and Codex (OpenAI's coding AI). Which one should you actually use?I'll give you the answer first. Use Opus 5.5 as the main engine. Call Fable 5.

Claude says it is investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5, and will provide an update as soon as possible. The incident affects requests to Claude Mythos 5.

Anthropic's AI Claude was reportedly down for thousands of users on September 21 with many complaining online.

"Claude Code's Fable or GPT-5.6 Sol—which one should I actually use?"Anyone who uses generative AI on a daily basis has likely encountered this question at least once. Every time a new model is released,