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Each row below is a Hugging Face repo ID you can pass as base_model when starting a Loops run, along with the maximum supported sequence length. Baseten adds rows as new models are validated end to end.

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Models

ModelMax sequence length
Qwen/Qwen3-0.6B8,192
Qwen/Qwen3-4B-Instruct-250740,960
Qwen/Qwen3-8B131,072
Qwen/Qwen3-30B-A3B-Instruct-2507131,072
Qwen/Qwen3.5-0.8B131,072
Qwen/Qwen3.5-2B131,072
Qwen/Qwen3.5-4B131,072
Qwen/Qwen3.5-9B131,072
Qwen/Qwen3.5-27B131,072
Qwen/Qwen3.5-35B-A3B131,072
Qwen/Qwen3.5-122B-A10B131,072
Qwen/Qwen3.5-397B-A17B131,072
Qwen/Qwen3.6-27B131,072
Qwen/Qwen3.6-35B-A3B131,072
moonshotai/Kimi-K2.6131,072
moonshotai/Kimi-K2.7-Code262,144

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Pass a model to Loops

Pass the table value verbatim as base_model through any of the following entry points:
  • The Python SDK, using tinker.ServiceClient.create_lora_training_client(base_model=...). See the Loops quickstart.
  • The HTTP API, using POST /v1/loops/runs.
  • The CLI, using truss loops push <base_model>, which provisions a session, run, and paired sampler in one call.
The minimal HTTP call provisions a run and its paired sampler against an existing session. Replace sess_xyz789 with the session.id returned by POST /v1/loops/sessions: 
curl --request POST \
  --url https://api.baseten.co/v1/loops/runs \
  --header "Authorization: Bearer $BASETEN_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "session_id": "sess_xyz789",
    "base_model": "Qwen/Qwen3.5-9B"
  }'
For the full request body, response shape, and an interactive playground, see POST /v1/loops/runs in the Loops API reference.

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Request a model

To request a base model that isn’t listed, contact support.