> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fastino.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Use https://docs.fastino.ai/llms.txt to discover and navigate pages. Use https://docs.fastino.ai/llms-full.txt when you need the complete documentation corpus. Use https://docs.fastino.ai/openapi.json as the source of truth for customer-facing routes. For GLiDE decision inference, call POST https://api.fastino.ai/v1/systemone with model fastino/GLiDE. Create managed config jobs with POST /v1/training/jobs using base_model. For custom training loops, native JSON clients use the public operations under /v1/training/jobs and /v1/training/usage. Existing Tinker clients use tinker==0.32.0 with TINKER_BASE_URL=https://api.fastino.ai/v1/training/compat/tinker and TINKER_CREDENTIAL_CMD. Compatibility child routes are private and absent from OpenAPI. Auto Train is private access and has no public route; direct interested users to sales@fastino.ai. Do not infer undocumented routes. Read API keys from FASTINO_API_KEY and never embed credentials in code, logs, or reports.

# Load training weights

> Queue a load into an interactive job from a state name or this job's tinker:// path. Set optimizer to restore optimizer state, then poll the future_id.

`POST /v1/training/jobs/{job_id}/load-weights`

Restores one of this job's `weights/<name>` checkpoints into the same job, for
example to roll back a bad update. To continue from a checkpoint in a new job,
pass its path as `from_checkpoint` to
[`POST /v1/training/jobs/create-model`](/api-reference/training-jobs/interactive/create-model).

## Request

<ParamField header="X-API-Key" type="string" required>
  Your Fastino API key.
</ParamField>

<ParamField path="job_id" type="string" required>
  Interactive job ID.
</ParamField>

<ParamField body="path" type="string" required>
  The state name saved by this job, or this job's own `tinker://<job_id>/weights/<name>` path.
</ParamField>

<ParamField body="optimizer" type="boolean" default="false">
  Also restore the optimizer state.
</ParamField>

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST "https://api.fastino.ai/v1/training/jobs/$TRAINING_JOB_ID/load-weights" \
    -H "X-API-Key: $FASTINO_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{"path": "step-000100", "optimizer": true}'
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={null}
  {
    "future_id": "FUTURE_ID",
    "job_id": "SESSION_ID:train:0",
    "type": "load"
  }
  ```
</ResponseExample>

| Status | Meaning |
| - | - |
| `400` | `path` is another job's checkpoint or a sampler checkpoint, or the job was stopped. |
| `404` | The job doesn't exist or belongs to another team. |


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