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latestOpenAPI 3.1.0MIT2026-08-08196464802.1 KB
RL

Weights sync

Submits a weights-sync operation that makes the session's current trained parameters available for sampling. Call this after optim-step when you want subsequent samples to use the updated policy.

post/rl/training-sessions/{session_id}/operations/weights-sync

Path parameters

session_idstring required

Training session ID

Request body

weight_sync_type'WEIGHT_SYNC_TYPE_SYNCHRONOUS' | 'WEIGHT_SYNC_TYPE_BACKGROUND_PUBLISH' | 'WEIGHT_SYNC_TYPE_PIPELINE' required

How updated policy parameters are made available for sampling. SYNCHRONOUS waits for the policy update before returning; BACKGROUND_PUBLISH returns after scheduling the update; PIPELINE overlaps the update with in-flight sampling when possible.

Response

Weights-sync operation details

idstring required

Operation ID

status'TRAINING_OPERATION_STATUS_UNSPECIFIED' | 'TRAINING_OPERATION_STATUS_PENDING' | 'TRAINING_OPERATION_STATUS_RUNNING' | 'TRAINING_OPERATION_STATUS_COMPLETED' | 'TRAINING_OPERATION_STATUS_FAILED' required

Example response

{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "error": {
    "message": "Operation timed out"
  }
}