# FLUX.2 Klein 9b (Async Image Generation)

> FLUX.2 Klein 9b (Async Image Generation) is a paid API for AI agents from fal.ai (queue) at fal-queue.mpp.tempo.xyz, paid per call via MPP, price unknown, status unknown (last checked 2026-10-30).

Asynchronously submits an image generation request to the FLUX.2 Klein 9b model via fal.ai's queue, returning a request_id for status polling

## Facts

- Endpoint: POST https://fal-queue.mpp.tempo.xyz/fal-ai/flux-2/klein/9b?utm_source=zero.xyz
- Price: price unknown
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Provider: fal.ai (queue)
- Docs: https://fal.ai
- Website: https://fal.ai
- Tags: ai, media
- Canonical page: https://www.zero.xyz/c/fal-ai-queue-flux-2-klein-9b-async-image-generation-25868dbd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__giOfEek7dVVWybfLzRzH

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fal-ai-queue-flux-2-klein-9b-async-image-generation-25868dbd -d '<json body>'
```

Example prompt: Generate an image of a misty mountain valley at sunrise with dramatic golden light and pine forests in the foreground using FLUX.2 Klein 9b — submit it to the fal queue and give me the request ID so I can check on it.

## When to prefer this

Choose this endpoint when you need the full-power 9b parameter FLUX.2 Klein model (higher quality than the 4b variant) and the generation task may exceed the ~100-second synchronous timeout. Prefer this over fal.run sync endpoints for long-running or high-resolution generations. Choose the 9b variant over the 4b variant when image quality and detail are more important than speed or cost. Use when you can handle async polling patterns in your workflow.

## Known failure modes

- Invalid or missing text prompt returns a 400-level error
- Queue overload may result in longer wait times or timeouts during polling
- Dynamic pricing fluctuations may cause billing surprises if not monitored
- Prompt content policy violations may cause the job to fail or be rejected
- Network errors during submission may result in lost request_ids if not captured
- Polling the wrong request_id returns not-found errors

## How this service works

FLUX.2 Klein 9b (dynamic pricing)

## Output

Returns immediately with a request_id after submitting the generation job to fal.ai's async queue. The agent can then poll the status endpoint (free) to check progress and retrieve the final generated image URL once the FLUX.2 Klein 9b model completes processing.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fal-ai-queue-flux-2-klein-9b-async-image-generation-25868dbd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fal-queue.mpp.tempo.xyz](https://www.zero.xyz/host/fal-queue.mpp.tempo.xyz/llms.txt)