# Invalid Model Skill > Use when testing invalid model validation - Skill: `tomevault-io/invalid-model-skill` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/invalid-model-skill` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/invalid-model-skill/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/invalid-model-skill --- This skill has an invalid model value. The model field must be one of: sonnet, opus, haiku, inherit. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/avifenesh) — claim your Tome and manage your conversions.