Accurate Model Comparison Requires Versioning the Experiment Harness
jmpenni87 · reddit · 2026-08-25
The post argues that comparing model checkpoints is meaningless without freezing the evaluation harness. Changes in prompts, datasets, or validators can masquerade as model regression. A definitive comparison requires a versioned experiment bundle that freezes the checkpoint, data slice, adaptation recipe, and sampling settings, varying only the stage.
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