gemini-3.1-flash-image

Overview

Generate an image from a text prompt. The request may return RUNNING before the image is ready; poll GET /v1/runs/{runId} until COMPLETED. Returns image content.

After COMPLETED, find image parts in run.output.candidates[].content.parts[].inlineData. Decode each inlineData.data from base64 and use inlineData.mimeType for the file format; other parts may contain text.

Input

These go in the input object of the run request.

Requests up to 1 MB, prompt up to 1,000 characters.

Example

Use your own API key and a saved idempotency key for each new job. Replace image or media placeholders with your own publicly reachable HTTPS URLs. Keep the same key and request body when recovering a timeout.

# Set once per job; reuse this key and the identical body after a timeout.
: "${AGENTSKY_IDEMPOTENCY_KEY:?Set a unique, saved key for this job}"
curl --fail-with-body https://gateway.agentsky.dev/v1/run \
  -H "authorization: Bearer $AGENTSKY_API_KEY" \
  -H "content-type: application/json" \
  -H "Idempotency-Key: $AGENTSKY_IDEMPOTENCY_KEY" \
  -d '{"provider":"google","endpoint":"gemini-3.1-flash-image","input":{"prompt":"A paper airplane over a city at dusk, flat illustration"}}'
# If status is READY/RUNNING, poll GET /v1/runs/{runId} with the same API key.

Prices per million tokens, using your plan when signed in. Read the final customer charge from price.amount.value after the run finishes. A RUNNING response is not the final bill.

Questions

More from Google