FLUX 2 Pro API (flux-2-pro)

from $0.024 per image (1MP $0.024 · 2MP $0.036 · 3MP $0.048) — https://api.apimart.ai/v1 の OpenAI 互換エンドポイント1つだけ、月額プランは不要です。(2026-10-12 時点)

APIキー · 料金 · モデルページ · ⚡ 60秒クイックスタート

チームが APIMart 経由で FLUX 2 Pro（flux-2-pro）を使う理由

• **キー1つでカタログ全体。**同じ https://api.apimart.ai/v1 の base URL と Authorization ヘッダーで FLUX 2 Pro（flux-2-pro）と画像・動画・言語モデルなど 300+ のモデルにアクセスできます。切り替えるのは model フィールドだけで、クライアント側の変更は不要です。
• **最低 $1 から、従量課金。**サブスクリプションも、事前に規模を見積もるプリペイドプランもありません。$1 からチャージして、呼び出した分だけ使えます。
• **課金内容はレスポンスで返ります。**完了したタスクはすべて請求額（cost / credits_cost）を報告し、failed になったタスクは返金されます。
• **非同期前提の設計。**送信して task_id を受け取り、GET /v1/tasks/{id} をポーリングするだけ。バッチ処理もリトライも特別な統合ではなく、普通のキュー処理です。

別名: フラックス

FLUX 2 Pro by Black Forest Labs generates images from text or references, priced per megapixel by output size.

Model id and routes

Route	model value	Billing	Notes
Per-image	flux-2-pro	per delivered image, by resolution	see the model page for the exact tiers

Endpoint: POST https://api.apimart.ai/v1/images/generations, then poll GET /v1/tasks/{task_id}.

Pricing

Output	List price	Effective price
1MP	0.03	0.024
2MP	0.045	0.036
3MP	0.06	0.048
4MP	0.075	0.06

Prices are a snapshot; the pricing page and data/model.json are refreshed by CI, and a completed task reports the exact amount in its cost field.

Request parameters

Field	Type	Default	Notes
model	string	required	the model id shown in the route table above
prompt	string	required	what to generate, or what to change when editing
size	string	auto / 1:1	aspect ratio, or auto where the route supports it
resolution	string	1K	output resolution tier — cost scales with it
n	integer	1	number of images per task, where the route allows more than one
image_urls	string[]	—	reference images as public HTTP(S) URLs or base64 data URLs
nsfw_check	boolean	false	runs omni-moderation-latest before submitting

The table lists the fields accepted by the APIMart images/generations endpoint. Check the model page for anything this model adds on top.

Quickstart

curl --request POST --url https://api.apimart.ai/v1/images/generations \
  --header "Authorization: Bearer $APIMART_API_KEY" --header 'Content-Type: application/json' \
  -d '{"model":"flux-2-pro","prompt":"A bamboo forest at sunrise, slow push-in","size":"1:1","resolution":"1K"}'

import os, time, requests

BASE = "https://api.apimart.ai/v1"
HEADERS = {"Authorization": f"Bearer {os.environ['APIMART_API_KEY']}", "Content-Type": "application/json"}

created = requests.post(f"{BASE}/images/generations", headers=HEADERS, timeout=60, json={
    "model": "flux-2-pro", "prompt": "A bamboo forest at sunrise, slow push-in",
}).json()
task_id = created["data"]["id"]

while True:
    task = requests.get(f"{BASE}/tasks/{task_id}", headers=HEADERS, timeout=60).json()["data"]
    if task["status"] in ("completed", "failed"):
        break
    time.sleep(5)
print(task.get("cost"), task["result"]["images"][0]["url"])

Runnable versions: examples/. The task lifecycle is pending → processing → completed | failed.

FAQ

FLUX 2 Pro のモデル id は何ですか？

flux-2-pro です。上のルート表を参照してください。

課金方法は？

from $0.024 per image (1MP $0.024 · 2MP $0.036 · 3MP $0.048)。完了したタスクは cost フィールドに正確な金額を報告し、失敗したタスクは返金されます。

How do I get a key?

Use the Get an API key link — $1 minimum top-up, no plan required.

Attributed links (how this repository is measured)

Purpose	Attributed link	Target
Model page	https://go.apimart.ai/k-93b65c	apimart.ai/ja/model/flux-2
Live pricing	https://go.apimart.ai/k-f3ea44	apimart.ai/ja/pricing
Get an API key	https://go.apimart.ai/k-64614e	apimart.ai/ja/keys

Outbound APIMart links are minted through the promo link API; hand-made tracking parameters are rejected by tools/check_links.py in CI.

Disclosure

FLUX 2 Pro is a third-party model served through APIMart; this repository documents how to call it and publishes model ids and prices, and does not claim official status. Model names, prices and documentation belong to their respective owners.

License

MIT — see LICENSE.