# Imagen 4.0 Fast Generate 001

Model id on AIHubMix: `imagen-4.0-fast-generate-001`

> **This model is scheduled for retirement.** Calls still work until then. Plan to migrate to `gemini-3.1-flash-image`. Its guide: https://aihubmix.com/model/gemini-3.1-flash-image/llms.txt
>
> Once retired, requests return HTTP 404 `model_retired`. Responses already carry RFC 8594 headers: `Sunset` (the retirement instant), `Deprecation`, and `Link: …; rel="successor-version"` when a successor is published — read those to detect this automatically. All retirements: https://aihubmix.com/models/retirements

No verified integration guide has been published for this model yet. This page only ships capability and endpoint details after they are verified, and this model is not covered so far.

Use these instead:

- Live model catalog (no auth): https://aihubmix.com/api/v1/models?type=llm&sort_by=order — confirm the id and pricing there
- Parameter schemas index (no auth): https://aihubmix.com/model-data/index.json
- Model page: https://aihubmix.com/model/imagen-4.0-fast-generate-001
- Site index for agents: https://aihubmix.com/llms.txt · Onboarding: https://aihubmix.com/agents.md

Do not guess endpoints or parameters for this model. Verify with a minimal real call before relying on anything (see https://aihubmix.com/agents.md — an HTTP 200 alone is not success).

---

Canonical version of this document: https://aihubmix.com/model/imagen-4.0-fast-generate-001/llms.txt