Running and reviewing a Space
How to run a Space, read its progress, use human checkpoints, and understand costs.
Updated July 19, 2026
How to run a Space, read its progress, use human checkpoints, and understand what a run actually costs.
Running a Space
Click Run in the bottom toolbar. SpaceLab executes the graph node by node, respecting the connections. The run drawer shows each node's live status:
| Status | Meaning |
|---|---|
| Pending | Queued, not started |
| Running | Currently executing |
| Completed | Finished, output ready |
| Failed | Errored (check the node for details) |
| Skipped | Bypassed (e.g. an unreached branch) |
| Awaiting approval | Paused at a human checkpoint |
If streaming drops mid-run, SpaceLab auto-resumes; you don't need to restart the run manually.
Human checkpoints
Selected generation nodes can be marked as a human checkpoint. The run pauses at that node (Awaiting approval) and waits for you to review the output before continuing. You can approve it, or re-run the node to try again, up to 10 re-runs per checkpoint slot.
Checkpoints are available on the generation-heavy nodes, including: Text (LLM), Prompt Enhancer, Image, Lyria 3, and every video model (Grok Imagine, Seedance 2.0 / Reference, Kling 2.5 / 3.0 / V3 Omni, Gemini Omni Video / Reference / Edit).
Use checkpoints when quality matters more than speed, for example approving the generated still before spending credits on the video step that depends on it.
Credits
Runs cost credits, priced per node by model. SpaceLab quotes the cost, reserves credits when the run starts, then settles to actual usage when it finishes. Pricing follows four shapes:
| Shape | Applies to | How it's billed |
|---|---|---|
| Per image size | Image Gen | Fixed credits per image, by resolution (1K/2K/4K) |
| Per second | Video models (Kling, Seedance, Grok, etc.) | Credits x duration in seconds |
| Flat | Utilities (BG Remove, Upscaler, Concat, Merge, Video-to-audio) | One fixed price per run |
| Token | Text / LLM, Prompt Enhancer | Input + output tokens x per-1k rates |
This is the same quote, reserve, settle pattern documented in Understanding credits for Spaces generally; SpaceLab runs use it at the individual node level.