# Flux 2 Klein 4B

## Facts

- Model name: flux-2-klein-4b
- Maker: Black Forest Labs
- Context window: 512 tokens
- Price: $0.0085 per image
- Providers: 1 independent provider
- Regions: global

## Providers

- [EmpirioLabs AI](https://liquidinference.ai/providers/4f49f07c-0d26-44bd-88a8-34f3f5fbd3b7.md): global, $0.0085 per image, 512 tokens of context

## Scores

- HLE: 5.3, #194 of 273
- GPQA: 29.1, #245 of 250
- AA-LCR: 6.7, #226 of 237
- Terminal-Bench Hard: 0.8, #159 of 166
- LiveCodeBench: 11.2, #126 of 130
- AIME 2025: 12.7, #92 of 100
- MMLU-Pro: 41.7, #129 of 133
- τ²-Bench: 5.0, #166 of 169
- IFBench: 28.3, #167 of 178

Scores: Artificial Analysis (https://artificialanalysis.ai/)

## Request

```sh
curl https://router.inference.ai.exchange/v1/images/generations \
  -H "Authorization: Bearer $LIQUID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-2-klein-4b",
    "prompt": "a cat on a bicycle"
  }'
```

## Questions

### What is Flux 2 Klein 4B?

Flux 2 Klein 4B is a model from Black Forest Labs.

### How much does Flux 2 Klein 4B cost?

Offers now ask $0.0085 image.

### What is the context length of Flux 2 Klein 4B?

The largest offer takes 512 input tokens. A smaller offer can take less. The exchange skips an offer that cannot take your message.

### What can Flux 2 Klein 4B do?

Its providers list Text.

### What inputs and outputs does Flux 2 Klein 4B support?

Text → Text · Images.

### Which providers serve Flux 2 Klein 4B?

1 independent provider quote it now, with 1 offer. The table above ranks them by the cost of a typical job.

### How do I call Flux 2 Klein 4B?

Send "flux-2-klein-4b" as the model in an OpenAI or Anthropic request. The API section links to setup steps for each client.

### When was Flux 2 Klein 4B listed?

The exchange first listed it on 10/17/2026. This is not its release date.

## Related pages

- [This page in a browser](https://liquidinference.ai/models/flux-2-klein-4b)
- [Flux 2 Dev](https://liquidinference.ai/models/flux-2-dev.md)
- [Flux 2 Klein Base 4B](https://liquidinference.ai/models/flux-2-klein-base-4b.md)
- [Flux 2 Klein Base 9B](https://liquidinference.ai/models/flux-2-klein-base-9b.md)
- [Flux 2 Pro](https://liquidinference.ai/models/flux-2-pro.md)
- [Flux Dev](https://liquidinference.ai/models/flux-dev.md)
- [Flux: Kontext Max](https://liquidinference.ai/models/flux-kontext-max.md)
- [Set up a client](https://liquidinference.ai/connect/flux-2-klein-4b)
- [All models](https://liquidinference.ai/models)
- [Providers](https://liquidinference.ai/providers.md)
- [Discover the best model for your budget](https://liquidinference.ai/discover)
- [Quickstart](https://liquidinference.ai/docs/quickstart.md)
- [llms.txt: the index of every page, as Markdown](https://liquidinference.ai/llms.txt)
- [llms-full.txt: every page in one file](https://liquidinference.ai/llms-full.txt)