New: Character customization · Role × Personality × Age

一个问题，
所有 AI 同时回答。

将同一问题并行发送到 OpenAI / Anthropic / Google 的模型，一屏对比回答、响应时间、Token 和费用。

免费开始登录

No credit card · Start with your own API keys

→ "Give me 3 pricing plans for a new SaaS."

OpenAI

GPT-5

💹 Economist / 🧐 Serious

Anthropic

Claude Opus 4.7

🎨 Designer / 🤗 Gentle

Google

Gemini 2.5 Pro

🚀 Operator / 🗡️ Blunt

Everything you need, in one dashboard

Model differences become obvious. Compare and keep chatting in the same view.

使用自己的 API 密钥

We don't charge for AI. You pay each provider directly. Keys are stored AES-256-GCM encrypted — never retrievable in plaintext.

并行流式输出

Every selected model starts writing at once. You wait only for the slowest one.

费用和速度可视化

Response time, input/output tokens and estimated cost shown per answer. Lifetime total pinned to the header.

Build each characterNEW

Combine role × personality × age × gender × tone per model. Make GPT-5 a strict economist and Claude a gentle teenager — simultaneously.

Turns stack

Each prompt builds on the conversation. The view auto-scrolls to the latest turn. Earlier turns stay visible.

13 languages

English, Japanese, Chinese (Simplified/Traditional), Korean, Spanish, French, German, Russian, Portuguese, Arabic (RTL), Hindi, Indonesian.

Start in 2 minutes

STEP 1

Sign up

10 seconds with email + password. Google sign-in coming.

STEP 2

Add API keys

STEP 3

Compare

Pick your models and ask. Answers stream in side by side.

Genuinely free.

No subscription. You pay each AI provider directly for their API usage. We run on ads.

Questions

Is it really free?

No subscription fee to us. You only pay each AI provider (OpenAI, etc.) for their API usage — billed directly by them.

Are my API keys safe?

Keys are AES-256-GCM encrypted at rest. Even we can't read them in plaintext. Transit is HTTPS; keys are sent only to each respective provider.

Which models are supported?

The latest from each provider: GPT-5, o3, GPT-4.1, GPT-4o family, Claude Opus 4.7 / Sonnet 4.6 / Haiku 4.5, Gemini 2.5 Pro/Flash and more.

How many models at once?

Up to 10 models per prompt. 3–5 is the sweet spot for readable comparison.

Run your first comparison

One email to sign up. If you already have keys, you're ready in seconds.

免费开始

一个问题，所有 AI 同时回答。