Multi-model AI chat & fact-check

One question. Four frontier AIs.
One clear answer.

CheckingDog runs four frontier models in parallel — Claude, GPT, Gemini, DeepSeek. Ask anything, or check a claim: each model answers in its own voice, reads your images and links, and pulls real-time context. Agreement builds confidence; disagreement shows you exactly what to question.

✅True❌False⚠️Misleading🔶Partly true⚡Contested

Try it now

Try it in 10 seconds

  1. 1

    Find a post

    Find any post on X that you want to ask about.

  2. 2

    Mention @CheckingDog

    Reply to or quote it and write @CheckingDog. You can add a question too.

  3. 3

    Get four answers

    About a minute later, one reply appears under yours, with four AIs’ answers side by side.

Try it on X

Three ways to ask

  • Language

    Add “用中文” or “in English” to choose the answer language. Say “一直用中文” and CheckingDog will remember.

  • Fact check

    Add “核查” or “fact check”. Each of the four models gives a verdict and its evidence.

  • Deep dive

    Add “深入” or “deep dive”. Each of the four models writes an in-depth analysis.

Real examples

How it works

  1. 1

    Ask or check

    Pose a question or paste a claim — text, images, and links all welcome.

  2. 2

    4 models, each in its own voice

    Claude, GPT, Gemini, DeepSeek answer in parallel, each labeled by name. Reads full context — posts, images, and linked articles.

  3. 3

    Real-time context, sourced

    Searches recent discussion for current events — not guessing from training data. For fact-checks you get agreement %, dissenting verdicts, cited sources, and full reasoning.

Start free

The free tier never expires: 3 units a day on the budget duo. Pro and Power come with a 7-day free trial.

  • •4 frontier models: DeepSeek · Claude · GPT · Gemini
  • •Fact-check or casual chat — each model answers in its own voice
  • •Reads full posts, images, and linked articles
  • •Real-time search for current events
Summon @CheckingDog on XSee plans · 7-day free trial