Kotonia
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POPULAR CHARACTERS

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CHARACTER CHAT

Meet voice-first
AI characters.

Pick a public persona and start chatting by text or voice. Language practice, work calls, and roleplay all begin from the first message.

  • No credit card
  • Start in 1 minute
  • Text input
  • Voice chat

PUBLIC TOOLS

Try Kotonia free AI tools right from search.

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Character Voice Chat

Pick a public persona and chat in real time with text or voice. Japanese / English / Chinese TTS engines with lip-synced avatars, and heavy research or code execution can be handed off to a background sub-agent so the conversation never blocks.

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Code Chat

You can switch between Gemini Flash, Qwen, Llama, Gemma, GPT-OSS and other open-weight models in one place. Tool integration and ReAct agent mode are available out of the box.

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AI Agent

Autonomous multi-step task execution with the ReAct pattern. Python in a cloud Linux sandbox, web search, and file generation from a single prompt. Free tier available (Flash-Lite, 10/day).

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kotonia Desktop

Download the local AI agent and just run it. Hand off code execution and file tasks on your own PC; sign in and it uses kotonia.ai's LLM inference directly, so you don't need your own GPU.

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Sassy AI English Tutor

A no-mercy roleplay partner that calls out every pronunciation slip. Get teased into perfect English so you never make the same mistake twice.

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Business Builder

Talk about your business and AI distills what matters, researches competitors, and generates a real, touchable website mock on the spot — hearing → design → build → review.

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AI Creative Studio

Tell the agent one line of intent — it drives HiDream-O1 for images, LTX-2 for video, and Gemini for self-review, all in one chat-driven creative loop.

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AI Image Generation Studio

Try HiDream-O1-Image for text-to-image, image editing, character consistency, pose control, and layout control.

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AI Voice Generation — Voice Studio

Multilingual TTS with VoxCPM2, voice cloning, and voice design from your browser.

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Choose a character and start talking.

Use text or your microphone while staying with the same character.