Shieldstral vs Llama Guard vs OpenAI Moderation API: A Self-Hosted Content Moderation Guide (2026)

1Key Takeaways

• Originally published on rohitraj.tech Mistral released Shieldstral on August 4, 2026 — a 3B open-weights safety classifier that reads your moderation policy at inference time instead of training on fixed categories.
• Here's how it actually compares to Llama Guard and the OpenAI Moderation API, the real self-host commands, and the one case where I'd still reach for a fixed taxonomy instead.
• Read the full version with code samples, diagrams, and architecture details: Shieldstral vs Llama Guard vs….