Last updated 07-23-2026
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16x Prompt
16x Prompt is a desktop app for developers who want more control over AI-assisted coding. You select source files, add task instructions and formatting rules, and the app assembles an optimized prompt with the right context for complex work on existing codebases.
You can copy the final prompt into ChatGPT, Claude, or any LLM, or send it directly through API integrations using your own keys. Supported providers include OpenAI, Anthropic Claude, Google Gemini, DeepSeek, OpenRouter, Ollama, and Azure OpenAI. The app also includes code edit mode with visual diffs, automatic backups, and side-by-side model comparison.
Prompt generation runs locally on your machine. Workspaces let you organize multiple repositories, save reusable task templates, and track token limits so prompts stay within model constraints. Available for macOS, Windows, and Linux.
Select source files and task instructions to build structured coding prompts
Copy prompts to any LLM or send via BYOK API to OpenAI, Claude, Gemini, and more
Apply AI code edits with visual diffs, automatic backups, and rollback
Compare responses from different LLM models side by side
Save reusable task instructions and custom formatting rules per tech stack
Organize multiple repositories in workspaces with token limit tracking
Runs locally on macOS, Windows, and Linux with dark mode support
Prompt generation runs locally, so source code stays on your machine.
Works with any LLM by copying prompts or connecting your own API keys.
One-time lifetime license option instead of a monthly subscription.
Free tier includes core features with a 10 prompts per day limit.
Free version caps usage at 10 prompts per day.
Paid licenses do not include refunds.
API integration requires separate billing with OpenAI, Anthropic, or other providers.
Is 16x Prompt free to use?
Yes. 16x Prompt is free to download and includes source code management, formatting instructions, prompt copying, and API integration. The free version is limited to 10 prompts per day. A lifetime license removes that limit.
Which programming languages does 16x Prompt support?
16x Prompt supports all major programming languages, including Python, JavaScript, TypeScript, Java, C++, SQL, and more. It also supports popular frameworks like React, Vue, Next.js, Flask, and Django.
Does 16x Prompt include an OpenAI or Anthropic API key?
No. 16x Prompt does not include API keys. You need your own OpenAI or Anthropic key to use the API integration feature. You can also copy prompts and paste them into ChatGPT Plus or Claude Pro without API billing.
Is 16x Prompt a cloud service?
No. 16x Prompt is a desktop application that runs locally. Prompt generation happens on your machine and your code is not stored on 16x servers. API features connect directly to the provider you configure.
Which platforms can I download 16x Prompt on?
16x Prompt is available for macOS (Intel and Apple Silicon), Windows, and Linux (.deb and AppImage). Downloads are available from the official download page.