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Feature Guide

Best AI with Custom Instructions

AI assistants that let you set persistent preferences and context.

By Council Research TeamUpdated: Jan 27, 2026

Why Custom Instructions Matters

Custom instructions save time by avoiding repetitive context-setting in every new conversation.

AI Models with Custom Instructions

ChatGPT

ChatGPT

Best Choice

OpenAI

Custom Instructions plus memory across chats

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Claude

Claude

Anthropic

Project-level instructions and system prompts

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Gemini

Gemini

Google

Gems for custom AI personas

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Compare AI Models with Custom Instructions

Test how different AI models use custom instructions for your specific needs.

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