Grok Imagine Video 1.5 API pricing and setup
Grok Imagine Video 1.5 (grok-imagine-video-1.5) is a xAI model. It is available through the relay.fast API with one relay.fast key and pay-as-you-go billing.
Prices checked from the live catalog. "From" is the lowest price among the relay.fast sources that currently serve the model. The price you pay depends on the source your request uses and can change on any day. The pricing page always shows current values.
| List price | $0.036 per second of video |
|---|---|
| relay.fast price from | $0.036 per second of video |
| Endpoints | /v1/videos |
Example request
Keep the key in the RELAY_FAST_API_KEY environment variable.
curl https://relay.fast/v1/videos \
-H "Authorization: Bearer $RELAY_FAST_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"grok-imagine-video-1.5","prompt":"A paper boat drifting on a rainy street"}'
# The job runs in the background. Poll it with the returned id:
curl https://relay.fast/v1/videos/VIDEO_ID -H "Authorization: Bearer $RELAY_FAST_API_KEY"Frequently asked questions
How much does the Grok Imagine Video 1.5 API cost?
On 2026-11-05, Grok Imagine Video 1.5 costs from $0.036 per second of video on relay.fast, against a list price of $0.036. The price depends on the source your request uses and can change; https://relay.fast/pricing/grok-imagine-video-1.5 shows the current value.
Which API endpoint does Grok Imagine Video 1.5 use?
Call /v1/videos with a relay.fast API key. OpenAI-compatible SDKs use the base URL https://relay.fast/v1.
Do I need a xAI account to use Grok Imagine Video 1.5?
No. You use a relay.fast account and API key. relay.fast is an independent API gateway and is not affiliated with xAI.