Universal Custom Instructions: Write Once, Use in Every AI
Stop maintaining separate 1,500-character instruction boxes across OpenAI, Anthropic, and Google. Centralize your AI persona in Meto and export tailored prompts with one click.
Universal Custom Instructions provide a single source of truth for your AI communication guidelines. Meto translates your persona, communication tone, and negative constraints into platform-tuned system prompts for ChatGPT, Claude.ai, Google Gemini, and DeepSeek, eliminating instruction drift and manual copy-pasting.
The Problem: 4 Different AI Apps, 4 Different Setting Forms
Siloed Custom Instructions
- ChatGPT limits you to two rigid 1,500-character boxes with zero version history.
- Claude.ai expects Markdown in Project instructions; Gemini expects AI Studio system instructions.
- When you update your preferences in one app, the other three apps remain stuck on outdated rules.
One Universal Command Center
- One centralized dashboard stores your persona, writing tone, and formatting constraints.
- One-click exports automatically tune token length and Markdown syntax for each platform.
- Switch easily between Work mode, Creative mode, and Research mode presets.
How Meto Tunes Prompts for Each Chatbot
1,500 Char Limits
Condenses your background and style directives into high-density tokens that fit cleanly inside ChatGPT's two Personalization fields.
Markdown Artifacts
Formats rich structured headers and XML tags optimized for Claude 3.7 Sonnet's deep nuance and Claude Projects memory.
Gems & AI Studio
Generates complete system prompt configurations ready to paste directly into Gemini Gems or Google AI Studio System Instructions.
Frequently Asked Questions
How do Universal Custom Instructions differ from standard ChatGPT instructions?
Standard ChatGPT Custom Instructions only work inside ChatGPT and are limited to two 1,500-character text boxes. Meto's Universal Custom Instructions give you a central profile that compiles customized, token-optimized prompts for ChatGPT, Claude.ai, Google Gemini, and DeepSeek with one click.
What happens when I want to change my writing tone or job role?
With standard custom instructions, you have to log into 3 or 4 different websites and manually rewrite your prompts. In Meto, you update your profile once (or tell Meto in chat), and all your export prompts update instantly.
Does Meto respect the character limits of each platform?
Yes! Meto specifically formats prompts to fit ChatGPT's 1,500-character limit, Claude's extended Markdown format, and Gemini AI Studio's system instruction parameters.
Can I create different instruction presets for work and personal use?
Yes. Meto supports preset modes (such as Work, Research, Creative Writing, and Minimal) so you can export the exact persona you need for the task at hand.
Take control of your custom instructions today
Build your universal instructions in 2 minutes. Free forever for individual users.