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RL

Get checkpoint

Returns metadata for a checkpoint: type, base model, LoRA rank, step, and owning session.

get/rl/checkpoints/{id}

Path parameters

idstring required

ID of the checkpoint

Response

Checkpoint metadata

idstring required

Unique identifier for the checkpoint

session_idstring required

Training session that produced the checkpoint

base_modelstring required

Base model the checkpoint was trained from

type'CHECKPOINT_TYPE_TRAINING' | 'CHECKPOINT_TYPE_INFERENCE' required

Whether a checkpoint is saved for training resume or inference download.

lora_rankinteger

LoRA rank of the session that produced this checkpoint. Absent for full-weight sessions and for checkpoints saved before this field was recorded.

created_atstring date-time required

Timestamp when the checkpoint was created

Example response

{
  "id": "123e4567-e89b-12d3-a456-426614174000",
  "session_id": "123e4567-e89b-12d3-a456-426614174000",
  "base_model": "Qwen/Qwen3-0.6B",
  "lora_rank": 32,
  "created_at": "2026-01-02T00:00:00Z"
}

Changes

Changed in 1 of the 14 revisions of this API.1