← Catalog
FuzzingEmerging
Glitch-token & unicode fuzzing
Feed anomalous tokens, rare unicode, homoglyphs and malformed encodings to trigger out-of-distribution behavior.
Published June 26, 2026
How it works
Certain under-trained tokens and unusual unicode sequences cause models to emit nonsense, ignore instructions, or bypass filters. Fuzzing the input encoding surfaces both reliability glitches and a real safety-bypass surface (homoglyph obfuscation of disallowed content).
When to use it
Robustness hardening; safety-filter evaluation; input-sanitization design.
Limitations
Findings can be version-specific and ephemeral as tokenizers change.
Cite this
Qlarify Labs. (2026). Glitch-token & unicode fuzzing. Retrieved from https://labs.qlarify.fi/catalog/glitch-token-fuzzing


