---
title: "Get Tune Results"
method: GET
path: "/tune/{session_id}/results"
tags: ["tune"]
---

# Get Tune Results

`GET /tune/{session_id}/results`

## Path parameters

- `session_id` string, required

## Response `200`

Tune results when completed (TuneResults), or PipelineError payload when the run failed.

- union
  - TuneResults
    - `session_id` string, required
    - `status` string, required
    - `best_params` object
    - `best_score` number, nullable, required
    - `n_trials` integer, required
    - `optimizer_used` string, required
    - `engine_used` string, required
    - `download_urls` object — URLs for tune artifacts that were produced and published.
    - `duration_seconds` integer, required
    - `completed_at` string, required
    - `error_message` string, nullable — Failure reason for terminal failed sessions that still expose partial tune results and artifact URLs.
  - PipelineError — Pipeline error response.
    - `session_id` string, required
    - `status` string
    - `error_message` string, required — Stable value-free diagnostic code
    - `failed_step` string, required — Step that failed
    - `completed_steps` string[] — Steps completed before failure
    - `partial_results` object, nullable — Partial results if available

## Other responses

- `202` — Tune still running
- `404` — Session not found

## Changes

- **2026-05-27** `bef81aa36f74` — 1 info
  - endpoint added
- **2026-04-29** `0ba9e71b823c` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/nvidia/apis/physics-agent-service/changes/tune/:session_id/results/get.md)

---

[API](https://skmtc.dev/nvidia/apis/physics-agent-service.md) · [All operations](https://skmtc.dev/nvidia/apis/physics-agent-service/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/nvidia/physics-agent-service/revisions/47f3bc191c91/schema)