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Generic feedback matches self-written critiques in hindsight self-distillation for financial reasoning

·2026.10.29 02:52

Key point

A study on GPT-OSS-20B shows that a fixed generic feedback line yields the same ~3-point performance gain as self-written critiques in multi-step financial reasoning.

Details

  • Replacing self-written critiques with a fixed generic feedback line in hindsight self-distillation matches the full performance gain of about 3 points.
  • Critiques from a 6x larger model do not materially improve performance, indicating that positional information from hindsight distillation reduces the need for privileged information.
  • The Fin-SD method matches OPSD from full reference solutions while using 9.5% fewer tokens.
  • The research focuses on multi-step financial reasoning using GPT-OSS-20B, where the student identifies its first wrong step and writes a critique.
llm-reasoningresearch-paperself-distillationfinancial-aigpt-oss-20b
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