Open-Weight Models in Production: When Self-Hosting Actually Beats the API
· 8 min read
Every few months, someone on your team forwards a blog post about how Llama or Qwen "matches GPT-4" on some benchmark, followed by the inevitable question: "Why are we paying for API calls when we could just run this ourselves?" The math looks compelling on a napkin. The reality is that most teams who attempt self-hosting end up spending more than they saved, not because the models are bad, but because they underestimated everything that isn't the model.
That said, there are specific situations where self-hosting open-weight models is the clearly correct decision. The trick is knowing which situation you're actually in, rather than the one you wish you were in.
