Qwen3.5-9B (hybrid-attention / thinking-mode-capable) continuations of
FineWeb prefixes — 100,000 source docs from HuggingFaceFW/fineweb
(sample-10BT), with up to 15 rollouts per prefix. Mode-collapse-filtered
AND detached-end-truncated.
Pool: 98,827 FineWeb docs filtered to match the CoT-oracle length
distribution (data_pipelines/fineweb_oracle/build_doc_pool.py).
Generation: Qwen3.5-9B (BF16, vLLM 0.20.0) generates 15… See the full description on the dataset page:
https://huggingface.co/datasets/cds-jb/synthweb-qwen3.5-9b.
