ABExperimentService5

Account1

Audio5

Batches4

Billing1

Chat1

Code Interpreter2

Completion1

ConfigService2

Deployments6

DeploymentService10

DeploymentsStorage2

DeploymentsVolumes2

Embeddings1

endpoints1

Endpoints8

EndpointService9

evaluation5

Files5

Fine-tuning14

GPUClusterService5

Hardware1

HealthCheckService1

Images1

InstanceClusterAddOnService5

InstanceTypeService2

Jobs2

Models2

PlacementProfileService2

Queue5

RegionService1

RemediationService6

Rerank1

RL29

RolloutService10

Secrets5

ShadowExperimentService10

SharedVolumeService5

SupportedModelsService2

Video2

Voices1

Volumes3

VolumeService13

Stop training session

Stops a training session.

post/rl/training-sessions/{session_id}/stop

Path parameters

session_idstring required

ID of the training session

Response

Training session details

idstring required

ID of the training session

display_namestring

Display name used to identify the training session

Status of the training session

resume_from_checkpoint_idstring

Checkpoint ID this session was resumed from

created_atstring date-time required

Timestamp when the training session was created

updated_atstring date-time required

Timestamp when the training session was last updated

model_resources_idstring required

Model resource this session is attached to. The session runs on that resource's GPU pods.

base_modelstring required

Base model the session trains, taken from the model resource it is attached to

created_bystring required

ID of the user who created the training session

Example response

{
  "id": "123e4567-e89b-12d3-a456-426614174000",
  "display_name": "gsm8k-experiment-2",
  "metadata": {
    "wandb": {
      "entity": "example-org",
      "project": "grpo-gsm8k",
      "group": "gsm8k-35b-sweep",
      "run_name": "exp2-thinking-4k-ctx",
      "run_id": "abc123",
      "url": "https://wandb.ai/example-org/example-project/runs/run-id"
    }
  },
  "error": {
    "message": "The session could not start because the selected resource has no available capacity.",
    "occurred_at": "2026-01-02T00:00:05Z"
  },
  "inference_checkpoints": [
    {
      "id": "123e4567-e89b-12d3-a456-426614174000",
      "created_at": "2026-01-02T00:00:00Z",
      "registration": {
        "model_name": "username/Meta-Llama-3-8B-rl-step-42-20260216",
        "registered_at": "2026-01-02T00:00:00Z"
      }
    }
  ],
  "training_checkpoints": [
    {
      "id": "123e4567-e89b-12d3-a456-426614174000",
      "created_at": "2026-01-02T00:00:00Z"
    }
  ],
  "resume_from_checkpoint_id": "123e4567-e89b-12d3-a456-426614174000",
  "created_at": "2026-01-02T00:00:00Z",
  "updated_at": "2026-01-02T00:00:05Z",
  "lora_config": {
    "rank": 32,
    "alpha": 64,
    "train_unembed": true
  },
  "model_resources_id": "123e4567-e89b-12d3-a456-426614174000",
  "base_model": "Qwen/Qwen3-0.6B",
  "created_by": "user_123",
  "policy_state": {
    "pending_publish": true
  }
}

Changes

Changed in 7 of the 15 revisions of this API.4215

Aug 31, 2026f4885bc384241See the full diff
- ○
  added the required property to the response with the status
  response-required-property-added
Aug 19, 20261fab430e87d65See the full diff
- ○
  added the optional property /// to the response with the status
  response-optional-property-added
- ○
  added the optional property /// to the response with the status
  response-optional-property-added
- ○
  added the optional property /// to the response with the status
  response-optional-property-added
- ○
  added the optional property /// to the response with the status
  response-optional-property-added
- ○
  added the optional property // to the response with the status
  response-optional-property-added
Aug 15, 2026468edbdc879c1See the full diff
- ○
  added the optional property / to the response with the status
  response-optional-property-added
Aug 8, 2026f26a23fab8e02See the full diff
- ○
  added the optional property / to the response with the status
  response-optional-property-added
- ○
  added the required property to the response with the status
  response-required-property-added
Aug 4, 2026ebd4756a41e42See the full diff
- ○
  added the optional property to the response with the status
  response-optional-property-added
- ○
  added the required property to the response with the status
  response-required-property-added
Jul 31, 20269ccc57e5e4b911See the full diff
- ▲
  the response property became optional for the status
  response-property-became-optional
- ●
  removed the optional property / from the response with the status
  response-optional-property-removed
This revision also has 11 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog
Jul 26, 20260c4fdad77435314See the full diff
- ▲
  the / response's property format changed from int64 to no format for status
  response-property-type-changed
- ▲
  the / response's property format changed from float to no format for status
  response-property-type-changed
- ▲
  the / response's property format changed from int64 to no format for status
  response-property-type-changed
- ●
  removed the optional property from the response with the status
  response-optional-property-removed
- ○
  the response's property default value changed from 16 to 64 for the status
  response-property-default-value-changed
- ○
  the response's property default value changed from 0.05 to 0.0 for the status
  response-property-default-value-changed
- ○
  the response's property default value changed from 8 to 32 for the status
  response-property-default-value-changed
- ○
  added the required property to the response with the status
  response-required-property-added
This revision also has 2 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

Full history