Support transformers v5#481

Merged

jlamypoirier merged 20 commits intomainfrom

jlp_transformers_v5

Apr 24, 2026

Commits on Apr 23, 2026

Support transformers 4.x and 5.x simultaneously

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Add transformers 5.x support to external models while preserving 4.x compatibility

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Fix MTP Llama converter bugs and hidden state collection

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Switch testing tokenizer from santacoder to gpt2

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Simplify transformers v5 compat; rename _TRANSFORMERS_V5 → _TRANSFORMERS_V4

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Replace W-object path chaining with explicit W() calls in plan.py

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Restore loop structure in plan.py; use prefix tuples only at layer init

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fix
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Fix mtp llama test
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Fix transformers v5 compat in apriel2 and mtp_llama external models

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misc
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Revert "misc"
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Fix transformers v5 compat in apriel2 external model tests

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Delete intermediate roundtrip checkpoints eagerly to reduce peak disk usage

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Commits on Apr 24, 2026