Use the Flux 2 API via RunAPI with a model skill, unified auth, and pay-as-you-go pricing.
curl -X POST https://runapi.ai/api/v1/flux_2/remix_image \
-H "Authorization: Bearer $RUNAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "flux-2-max-text-to-image",
"prompt": "Generate a photorealistic studio portrait of an astronaut holding a cat, dramatic rim lighting, fine detail."
}'import { Flux2Client } from "@runapi.ai/flux-2";
const client = new Flux2Client();
const result = await client.remixImage.run({
model: "flux-2-max-text-to-image",
prompt: "Generate a photorealistic studio portrait of an astronaut holding a cat, dramatic rim lighting, fine detail.",
});<?php
require __DIR__ . "/vendor/autoload.php";
use RunApi\Flux2\Flux2Client;
$client = new Flux2Client();
$result = $client->remixImage->run([
'model' => 'flux-2-max-text-to-image',
'prompt' => 'Generate a photorealistic studio portrait of an astronaut holding a cat, dramatic rim lighting, fine detail.',
]);require "runapi/flux_2"
client = RunApi::Flux2::Client.new
result = client.remix_image.run(
model: "flux-2-max-text-to-image",
prompt: "Generate a photorealistic studio portrait of an astronaut holding a cat, dramatic rim lighting, fine detail."
)npx skills add runapi-ai/flux-2 -g# Claude Code
claude mcp add runapi -s user -- npx -y @runapi.ai/mcp
# Codex
codex plugin install runapi-mcp@agents
# Cursor / Windsurf / VS Code
npx @runapi.ai/mcp init cursorFlux 2 is Black Forest Labs' text-to-image and image remix model known for strong prompt adherence and high visual fidelity. Its pro tier auto-enhances prompts, while the flex tier exposes manual control over inference steps and guidance.
| Endpoint | Resolution | Duration | Price | |
|---|---|---|---|---|
| remix_image | 1k, 2k | — | $0.14-$0.24 / image |
Prices shown for flux-2-flex-remix-image. Other variants retain their own endpoint pricing.
Sign up and generate an API key from the dashboard.
Choose the version that best matches your quality and cost requirements.
Submit your prompt and parameters to the model's documented endpoint.
Poll the task or set a webhook, then download the completed output.
Flux 2 is Black Forest Labs' generation model, delivering high prompt adherence across text-to-image and remix-image tasks. Through RunAPI, Pro and Flex variants share the same API shape.
A single RunAPI API key unlocks the whole model catalog across all providers. No separate accounts to create, no API keys to rotate per integration, and no credential management overhead. Add a new model to your app by changing one parameter.
Per-call pricing in USD, billed monthly into a single invoice. No subscription tiers, no minimum spend, and failed generations are never charged. The pricing page and check_pricing API show exact costs before you commit to a model.
Typed schemas, parameter constraints, and setup notes are packaged in the model skill so your implementation starts from the right contract. The skill loads into Claude Code, Codex, Gemini CLI, Cursor, and VS Code — your agent knows the correct request shape before you write a line of code.
Pro is the flagship tier with automatic prompt enhancement. Flex gives you control over inference steps and guidance, and supports up to 8 reference images.
Flux 2 is specifically known for strong prompt adherence — it follows detailed descriptions including spatial relationships, colors, and object counts more faithfully than most models.
Yes — both Pro and Flex have dedicated remix-image variants that use source images as style or content seeds.
The Pro variant automatically refines your prompt for better visual results. This is a zero-config feature — no extra parameters needed.
Flux 2 is for generating new images from prompts or remixing source images. Flux Kontext is for editing existing images with contextual awareness.
Pick the cheapest variant that meets your quality bar. Most teams start on the fast variant and graduate to pro for production.