AI on every tab. Your key, your models.

Press your shortcut (Alt+Z by default) and chat with GPT, Claude, Gemini, or Grok without leaving the page. 62 models behind one OpenRouter key, paid at provider prices with no subscription on top.

Get it for $49
Claude Sonnet 5
Ask anything...

Chat with AI

Streaming chat with any model, switchable mid-conversation. Web search included.

AI Commands6 built in
Prompt

Fix the spelling and grammar of: {selection}

AI Commands

Six built-in commands, or write your own using anything on the page.

62 modelsOne key. No markup.
OpenAIGPT-5.5 ProGPT-5.5GPT-5.4GPT-5.3 Codex
AnthropicClaude Sonnet 5Claude Fable 5Claude Opus 4.8Claude Haiku 4.5
GoogleGemini 3.5 FlashGemini 3.1 ProGemini 3 Pro
MoonshotAIKimi K2.7 CodeKimi K2.6Kimi K2 Thinking
xAIGrok 4.5Grok 4.3Grok 4.20
Z.AIGLM 5.2GLM 5.1GLM 5 Turbo
OpenAIGPT-5.5 ProGPT-5.5GPT-5.4GPT-5.3 Codex
AnthropicClaude Sonnet 5Claude Fable 5Claude Opus 4.8Claude Haiku 4.5
GoogleGemini 3.5 FlashGemini 3.1 ProGemini 3 Pro
MoonshotAIKimi K2.7 CodeKimi K2.6Kimi K2 Thinking
xAIGrok 4.5Grok 4.3Grok 4.20
Z.AIGLM 5.2GLM 5.1GLM 5 Turbo

Three ways to use it

Chat when you want a conversation. A quick answer when you don't. Commands when the page itself is the input.

Video Poster
Chat with AI
Full chat with any model, on any tab.

Chat

A full chat with any model, opened on whatever tab you are in. Switch models mid-conversation. Your chats are saved and searchable.

Video Poster
Ask AI
Type a question. Hit Tab. Skip the chat UI.

Ask

Type a question in the launcher, hit Tab, and the answer appears without a chat window. Good for the hundred small questions a day.

Video Poster
AI Commands
Reusable prompts with dynamic variables, and a different model for each one.

Commands

Summarize the page, translate a selection, fix grammar. Or write your own reusable prompts with variables.

Commands that work on the page

Built-in commands read your selection or the page, so the prompt writes itself.

Ask About Page Ask a question about the page you are on. The page text is the context.
Summarize Boil a long article or your selection down to the key points.
Translate To Translate the selection or the page to any language you type.
Fix Spelling and Grammar Select text, run the command, get the corrected version back.
Rewrite As Rewrite a selection in whatever tone you name.
Simplify Text Turn dense text into plain language without losing the meaning.

Why bring your own key?

Most AI extensions resell model access as a monthly subscription. UtilEngine doesn't. You connect your own key, pay OpenRouter or the provider directly, and the extension is a one-time purchase. If you use AI heavily, you pay for that. If you barely touch it, you pay almost nothing.

How bring-your-own-key works

AI, answered

Which AI models can I use?

62 models from OpenAI, Anthropic, Google, xAI, MoonshotAI, and Z.AI through one OpenRouter key. You can also plug in OpenAI, Anthropic, or Google API keys directly.

Do I pay for AI usage separately?

Yes, and that is the point. You pay OpenRouter or the provider directly for what you use, at their prices. UtilEngine takes no markup and sells no AI subscription.

Where is my API key stored?

In your browser's extension storage. Keys never sync to our servers.

Can different commands use different models?

Yes. Every AI command has its own model setting. Use a fast model for grammar fixes and a stronger one for analysis.

Does it work on any website?

Yes. The launcher opens on any page. Commands can read your selection or the page text when you ask them to.

Can the AI search the web?

Yes. Chat has a web search tool for questions about current events and fresh data. You pick the model that runs it.

Every model, one keystroke away

AI on every tab, plus 50+ commands. One payment, yours forever.

Get it for $49

One-time payment. 14-day refund, no questions asked.

Command palette Everything behind one keystroke
Sessions Save windows, restore them anywhere
Bring your own key No subscription, provider prices