What is FLUX.2 Flex API?
Configurable FLUX.2 model balancing quality, latency, and control.
Technical Specifications
- Supported inputs: Image, Text
- Output: Image
- Endpoint: /images/generations
Performance Benchmarks
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FLUX.2 Flex API Pricing
- Pricing on request
Where to Use FLUX.2 Flex
High-volume image generation
Produce product visuals, thumbnails, and marketing assets programmatically at scale.
Creative and concept art
Turn text prompts into illustrations, mockups, and design explorations.
Image editing and variations
Provide a reference image to guide edits, restyles, or variations.
Code Sample
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Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.
Product mockups with precise text and brand assets are documented use cases for this model, along with marketing materials and typography-heavy creative work.
It is also documented as suited to campaigns that need consistent characters across images, product placement across different contexts, and brand-accurate color matching.
Another documented use case is text-intensive layouts and images that require text overlays or careful preservation of fine details.
It is further documented for creative workflows that need fine-grained control over generation parameters, including manual quality-speed tradeoffs.
import requests r = requests.post( "https://api.aimlapi.com/v1/images/generations", headers={"Authorization": "Bearer " + AIMLAPI_KEY}, json={ "model": "blackforestlabs/flux-2-flex", "prompt": "A cat holding a sign that says hello" }, ) print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/images/generations", { method: "POST", headers: { Authorization: `Bearer ${process.env.AIMLAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "model": "blackforestlabs/flux-2-flex", "prompt": "A cat holding a sign that says hello" }), }); console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/images/generations \ -H "Authorization: Bearer $AIMLAPI_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"blackforestlabs/flux-2-flex","prompt":"A cat holding a sign that says hello"}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Output | |
| Benchmark | Score | What it measures | Source | Retrieved |
|---|---|---|---|---|
| Text-to-Image Arena | 1026 | Human preference Elo from blind pairwise comparisons of generated images, measured independently by Artificial Analysis | Source | September 28, 2026 |
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
FLUX.2 Flex This page | Image generation at scale | |||
| Image generation at scale | ||||
| Image generation at scale | ||||
| Image generation at scale | ||||
| Image generation at scale |
FLUX.2 Flex takes image, text as input and returns image.
FLUX.2 Flex became available on June 12, 2026.
FLUX.2 Flex is priced at $0.065 / MP (variable).
FLUX.2 Flex is billed per generation — a fixed charge per output rather than by prompt length.
Yes, FLUX.2 Flex accepts image input as well as a text prompt.
FLUX.2 Flex was built by Black Forest Labs.
Send a request to https://api.aimlapi.com/v1/images/generations with blackforestlabs/flux-2-flex as the model id.
Yes. FLUX.2 Flex is served through AI/ML API, so the same key and endpoint format used for other models applies.
No. It is an image generation model that turns text or text-plus-image prompts into images.
It is a configurable version of FLUX.2 designed to balance image quality, generation speed, and user control.
