Last refreshed 2026-10-20. Next refresh: weekly.
Why use FLUX 3 Image Klein on Vercel AI Gateway?
Vercel AI Gateway offers FLUX 3 Image Klein. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
Compare FLUX 3 Image Klein across 2 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport AI_GATEWAY_API_KEY=...import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],bfl/flux-3-image-kleinRequest example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="bfl/flux-3-image-klein",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "bfl/flux-3-image-klein", not the LLMReference slug "flux-3-image-klein".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; rename it only if your application config maps the new variable.
Compare FLUX 3 Image Klein Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Black Forest Labs | — | — |
| Vercel AI Gateway | — | — |
Capabilities
About FLUX 3 Image Klein
FLUX 3 Image Klein is Black Forest Labs' 5.6-billion-parameter open-weights image generation and editing model, released October 15, 2026 as a smaller version of FLUX 3 Image. It supports text-to-image, image editing, up to ten reference images and bounding-box layouts, with output from 768 x 768 up to 4K. The distilled model runs 16 steps (a 50-step Klein Base is published for fine-tuning and LoRA) and fits consumer GPUs down to 8GB VRAM with the INT8 build. The BFL API serves it as flux-3-image-klein from $0.008 to $0.036 per image; weights are on Hugging Face under the FLUX Kommunity License.