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Which AI Model Should You Use for Which Task?

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post Freddys blog

Freddy Kristiansen · 2026-08-23 · 3,747 words · about 17 min

"A good harness manufactures verifiability the raw task didn't have - and every bit of verifiability you add lets you reach for a weaker model."

Quotes

  • “A good harness manufactures verifiability the raw task didn’t have - and every bit of verifiability you add lets you reach for a weaker model.” (Shows that the scaffolding around a model is as important as the model itself in determining which tier you need)
  • “Staff each task with the cheapest model that clears that bar, and save your architects for the handful where judgment really is the product.” (Encapsulates the economic principle: use strong judgment where it adds value, automate the rest)

Context

  • Features: model selection framework, task verifiability assessment, harness and scaffolding, skills as runbooks, automatic routing, open-weights models, self-hosted models, model comparison

Source: Freddys blog, community blog. Summary, key points and quotes are derived (CONTENT-NOTICE.md); read the original for the full text.