Write your prompt as usual
Opten embeds directly into the generator interface. No copy-pasting to other windows.
Stop Wasting Credits
On Bad Prompts
Opten evaluates your prompt for the specific AI model, shows what's wrong, and fixes it in one click. Right inside the generator interface.
After installing, use it on these sites:
Soon
Soon
Opten is an independent product. The brands shown are not affiliated with Opten.
All 60+ models →Three Steps To
The Perfect Prompt
Click the icon 
— Opten scores your prompt
A color ring, specific recommendations, and a diagnosis: what's wrong and why. For your specific model, not just "in general".
One click 
— prompt improved
"Enhance" rewrites the prompt following all rules of the chosen AI model. Paste and generate.
Not Another
"Prompting Tips" List
60+ models. Each with its own rules.
Midjourney loves short metaphors. Flux requires technical parameters. DALL·E wants detailed descriptions. Opten knows the rules of every model — and checks your prompt against them, not "in general".
Works where you generate
No need to switch tabs or copy text. Opten appears right inside your generator interface — like Grammarly appears in Gmail.
Every bad prompt burns your credits
Opten users save 30%–50% of generation credits. With an average spend of $20–50/mo on generators, Opten pays for itself in the first hour of use.
Prompt improvement in one click
"Enhance" rewrites the prompt in 2 seconds. It considers style, technical parameters, model constraints, and your original intent.
Your Prompts Belong To You
We don't store prompts
The extension analyzes text locally and via a secure API channel. Your prompts and images are never saved on our servers.
We don't sell or share data
We don't sell user content, use it for advertising, or provide it to third parties for model training.
Minimal permissions
Opten requests only the browser permissions necessary for operation. No access to your history, bookmarks, or other tabs.
Get Started. Upgrade To Pro When You're Ready.Get Started.
Upgrade To Pro
When You're Ready.
One-time payment
$4.99
- 300 generations per month
- One-click improvement
- Telegram support
- Pay for 1 month
- No auto-charges
Subscription
$2.99per month
- 300 generations per month
- One-click improvement
- Priority analysis speed
- Auto-renewal
- Telegram support
Frequently asked questions
- What is Opten and how does it work?
- Opten is a Chrome extension that scores your prompt right inside the AI generator's interface (Syntx, Higgsfield, Freepik (including Magnific)) and one-click improves it for the specific model: Midjourney, Sora, Kling, Nano Banana, GPT Image 2, and 50+ others. The extension auto-detects the model from the page URL and applies rules from that model's documentation — a 0–100 score, up to five specific issues, and an auto-enhance button.
- How much does Opten cost?
- Pro — $2.99/mo (via Paddle) or $4.99 one-time without subscription. For ruble payments via YooKassa — 199₽/mo or 299₽ one-time. Installing the extension and creating an account are free. This is five times cheaper than PromptPerfect ($9.99), and Opten works inside familiar generators (Syntx, Higgsfield, Freepik) rather than its own chat window.
- Which models are supported?
- 60+ models including: Seedance (all versions), Seedream, Kling with motion-control, Midjourney 7/8/niji/video, GPT Image 2, Flux, Nano Banana, Imagen, Luma Ray, Sora 2, Veo 3/3.1, Runway, MiniMax Hailuo, Pixverse, LTX, Wan, Qwen, Grok Imagine and more. For rare models Opten falls back to a baseline rule set instead of throwing an error.
- Does Opten store my prompts on its servers?
- No. Prompts and reference images flow through a Vercel proxy to Claude Haiku 4.5 for analysis and are NOT stored — neither by Opten nor by Anthropic (per API policy). No prompt-content telemetry. Your account only tracks the monthly count of checks used.
- Where does the extension work?
- Currently fully supported: syntx.ai (all generation pages), higgsfield.ai (image + video), freepik.com (AI generators including Magnific, and brand mode). We're actively expanding to other AI aggregators — Aitrix, TensorArt, OpenRouter, Flora, MagAI. If your favorite site isn't supported yet, message @v_voronezhtsev on Telegram and we'll prioritize by request volume.