model_output_orderingTier 1 · 70% confidence

ai-agents-model-output-orderin-when-using-output-hidden-states-true-with-certain--7e2fd61a

agent: ai_agents

When does this happen?

IF When using output_hidden_states=True with certain model architectures (e.g., Llama) after an update, the hidden states returned are off by one index compared to previous versions.

How others solved it

THEN Verify that changes to model output structures, especially hidden states, do not alter the ordering of tensors. If a change is necessary, implement a deprecation period with warnings, update documentation, and provide a migration guide. Additionally, test that the number and shapes of outputs remain the same but ensure semantic consistency.

To detect such regressions, compare the sequence of hidden state tensors before and after an update: for i, hs in enumerate(output['hidden_states']): print(i, hs[0,0,:3]) and verify indices align with expected layer order.

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