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  • Free
  • No sign-up
  • 10 messages a day

Free AI Chat

Try DeepSeek V4 Flash right in your browser, no account needed. When you're ready to build, call the same model with one OpenAI-compatible API key.

DeepSeek V4 Flash

What would you like to ask?

Type a message or start with an example.

Messages are used only for this answer and are not stored.0/2000

Call the same model with the API

Change the base URL and key and any OpenAI SDK works as is.

from openai import OpenAI

client = OpenAI(base_url="https://api.hiapi.ai/v1", api_key="YOUR_HIAPI_KEY")

stream = client.chat.completions.create(
    model="deepseek-v4-flash",
    messages=[{"role": "user", "content": "Hello!"}],
    stream=True,
)
for chunk in stream:
    print(chunk.choices[0].delta.content or "", end="")
Create an API keySee model pricing

Try the model before you write code

This page talks to DeepSeek V4 Flash through the same HiAPI endpoint your code would use. Ask it to explain something, draft text, translate, or write and fix code, and see how fast and how well it answers before you spend anything.

There's no account and nothing to install. You get 10 messages a day, and only answers that actually arrive count. When you want more, the code below shows the exact request: change the base URL and key in any OpenAI SDK and keep the rest of your code.

How to try it

  1. 1

    Ask anything

    Type a question or pick an example. Press Enter to send and Shift+Enter for a new line.

  2. 2

    Keep the conversation going

    Follow-up questions remember the last few turns. Start a new chat any time.

  3. 3

    Move to the API

    Copy the Python or curl example, add your HiAPI API key and call the same model from your own app.

Call the same model from your code

Everything you need to switch from this page to the API. Any OpenAI-compatible SDK or tool works.

  1. 1Base URL

    https://api.hiapi.ai/v1

    Set it as base_url in the OpenAI SDK or in your tool's provider settings.

  2. 2API key

    Authorization: Bearer <your key>

    Create one in the dashboard. Keep it on your server, never in browser code.

  3. 3Model

    deepseek-v4-flash

    The exact model this page uses. Other text models work with the same request.

  4. 4Endpoint

    POST /v1/chat/completions

    The standard chat format: a list of system, user and assistant messages.

  5. 5Streaming

    "stream": true

    Get tokens as they're generated, like this page does.

  6. 6Billing

    Pay per token, no subscription

    Input and output tokens are billed separately. See the model page for live prices.

What to try

Explain

Ask it to explain a concept, an error message or a contract clause in plain words.

Write

Draft emails, product descriptions, social posts and outlines, then ask for a shorter or friendlier version.

Code

Write a function, explain a stack trace or convert code between languages.

Translate

Translate between English and Chinese and ask it to match a tone or audience.

Summarize

Paste up to 2,000 characters and ask for key points or a one-line summary.

Brainstorm

Get names, angles and ideas, then ask it to rank them or expand the best one.

Tips for better answers

  • Give context

    Say who it's for and what you'll use it for. "An email to a client who missed a payment" beats "write an email".

  • Ask for a format

    Bullets, a table, under 100 words, JSON: say it and you'll get it.

  • Iterate

    Follow up with "shorter", "more formal" or "add an example" instead of starting over.

  • Check facts

    Language models can be confidently wrong. Verify names, numbers and dates before you rely on them.

  • Keep secrets out

    Don't paste passwords, keys or personal data into any chat tool.

  • Move heavy work to the API

    Long documents, batches and automations belong in your own code with your own key.

Frequently asked questions

Is this AI chat really free?

Yes. No sign-up, no card. You get 10 messages every 24 hours, and a message only counts when an answer arrives.

Which model am I chatting with?

DeepSeek V4 Flash (deepseek-v4-flash), served through the HiAPI API, the same model you can call with your own key.

Does it remember the conversation?

It remembers the last few turns of this chat so you can ask follow-ups. Starting a new chat or reloading the page clears it.

Are my messages stored?

No. Messages are sent to the model only to answer you and are not saved by this page.

How do I use the same model in my app?

Create a HiAPI API key, set the base URL to https://api.hiapi.ai/v1 in any OpenAI-compatible SDK and use the model name deepseek-v4-flash. The example on this page is ready to copy.

Why is there a daily limit?

The demo is free for everyone, so each visitor gets a fair share. With an API key there's no daily cap; you pay only for the tokens you use.

Build with the HiAPI API

One OpenAI-compatible API key for DeepSeek, GPT, Claude, Gemini and more. Pay as you go, no subscription.

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