How Claude Fable 5.1 can encode — and decode —messages in images.

Research done as part of the Singapore AI Safety Fellowship shows how Anthropic’s AI model can embed hidden messages into images using Morse code, object rotations, colors, and heights. The researchers also found that separate sessions of Fable 5.1 could decipher about 78 percent of the hidden messages based on a screenshot. [Image: https://platform.theverge.com/wp-content/uploads/sites/2/2026/10/fable-decode-1.png?quality=90&strip=all] [Image: https://platform.theverge.com/wp-content/uploads/sites/2/2026/10/fable-decode-2.png?quality=90&strip=all] [Image: https://platform.theverge.com/wp-content/uploads/sites/2/2026/10/fable-decode-3.png?quality=90&strip=all]