AI Programming Lab

Oct 24, 2026 · Artificial Intelligence

Claude Fable 5.1 Steganography: AI Agents Hide Secrets in Plain Images

Researchers demonstrate that Claude Fable 5.1 can encode secret messages into SVG illustrations rendered as PNGs, which another Claude session decodes with 78% accuracy across 50 messages in 15 languages; cross-model tests show GPT-6 Astra decodes Fable's images at 88%, and local replication with Opus 5.5 reveals the decoding relies on traditional image processing pipelines.