# Medusa(gemma)-E4b MLX 4bit Known Limitations

- This is the compact MLX local build, not the full deployed assistant stack.
- Arithmetic exactness depends on the arithmetic router when enabled.
- Missing-data refusal depends on the refusal router when enabled.
- Structured-output reliability depends partly on validators and sanitizer behavior.
- Optional code repair depends on the sandbox and test harness.
- Bare-model behavior should not be described as perfect arithmetic or perfect refusal.