FLUX.1 Kontext [dev]

by Black Forest Labs

FLUX.1 Kontext [dev] brings Black Forest Labs' instruction-based image editing to open weights, released in June 2025 as a 12 billion parameter diffusion transformer guidance-distilled from Kontext [pro]. Rather than generating from scratch, it takes a source image together with a plain-language instruction and returns an edited version, handling both precise local changes and broader global transformations. The model is built for iterative editing, preserving characters, objects, and style across successive edit steps with minimal visual drift. Its size lets it run on accessible hardware, which suits teams building repeatable programmatic editing pipelines, product image touch-ups, and multi-step creative workflows around an open model.

Call FLUX.1 Kontext [dev] on Opper with the OpenAI SDK. Sign up without a credit card. Get started

Key info

Input
Output
Features
Pricing
$0.025 / megapixel
Billing
Per megapixel
  • US residency available
  • Zero data retention with abuse monitoring
  • No training by default
  • GDPR DPA available

Pricing

Usage-based pricing, billed per megapixel, not by token.

VariantPrice
Standard$0.025 / megapixel

Available routes

FLUX.1 Kontext [dev] runs on 1 route through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

ProviderRegionZero data retentionTrainingPrice
USNo$0.025 / megapixel

Data handling per route

Each route hosting FLUX.1 Kontext [dev] has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

fal — United States🇺🇸

Zero data retention with abuse monitoring: prompts and outputs are kept for abuse monitoring only, for a window the provider does not state, and are not used for training. No training on customer data. US; SCCs; DPA available.

Zero data retention
With abuse monitoring, window not stated.
Training
No training on customer data.
Logging
Abuse monitoring
Abuse monitoring
On by default, holds flagged content
GDPR DPA
DPA available
Transfer mechanism
SCCs

Get started

Call FLUX.1 Kontext [dev] through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

FLUX.1 Kontext [dev] is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.ai/v3/compat",
});
const completion = await client.chat.completions.create({
model: "fal/flux-kontext-dev",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Use FLUX.1 Kontext [dev] in your apps

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