Snowball 67B-A2B SFT Stage 2: Thinking
This is the BF16 Hugging Face/vLLM export of the Thinking stage in Marin's ordered Chat → Thinking → Agentic SFT campaign.
Training provenance
- Initialization: final Stage 1 Chat checkpoint at step 257
- Data:
laion/llama-nemotron-science-reasoning-on-canonical-think-fullat revisionbae881d - Schedule: one packed epoch, 630 steps
- Native checkpoint:
s3://marin-us-east-02a/marin/grug/snowball_step105149_sft_s2_thinking/2026.08.13.1/checkpoints/step-630/ - Source:
marin-community/marin#8172at7b1ea1dc07 - Experiment:
marin-community/marin#8225
The export preserves the Marin tokenizer and Delphi special tokens.