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Chat with DeepSeek: DeepSeek V4 Pro

Commercial use OK 380+ models No watermark No sign-up needed
Model:
+ GPT-5, Claude, Gemini
Chat model Premium 1048576 ctx
DeepSeek: DeepSeek V4 Pro — DeepSeek: DeepSeek V4 Pro is an AI model by DeepSeek on Free.ai. It supports up to 1,048,576 tokens of context. Costs approximately 535 tokens per message. Try DeepSeek: DeepSeek V4 Pro instantly — no sign up needed. Compare it side-by-sid…
~535 tokens/message

What is DeepSeek: DeepSeek V4 Pro?

DeepSeek: DeepSeek V4 Pro is an AI model by DeepSeek on Free.ai. It supports up to 1,048,576 tokens of context. Costs approximately 535 tokens per message. Try DeepSeek: DeepSeek V4 Pro instantly — no sign up needed. Compare it side-by-side with other models.

Why use DeepSeek: DeepSeek V4 Pro for chat?

Streaming responses

Replies stream token-by-token within ~1 second of pressing Send. No idle waiting.

Saved history

Signed-in users see every chat in /account/?tab=history with one-click share links.

Compare side by side

Send the same prompt to two models at /chat/compare/ and judge the outputs side by side.

Commercial use OK

Outputs are yours. Use them in apps, ads, docs, or anything else without attribution.

Sample prompts

Plan a 7-day Tokyo trip with kids, balancing food, parks, and museums
Draft a cold-outreach email to a VC introducing my dev-tools startup
Compare three approaches to rate-limiting an HTTP API and recommend one
Write a 600-word blog intro about why teams should self-host their AI
Outline a 30-minute presentation on quantum computing for a non-technical audience

Pricing

Premium chat. Cost is per message — typically ~535 tokens. $1 buys 750,000 tokens, so even paid models cost cents per chat. Free signups get 10,000 tokens to try.

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Full model reference → · See all chat models → · Compare 2 chat models side-by-side →

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DeepSeek: DeepSeek V4 Pro is an AI model by DeepSeek on Free.ai. It supports up to 1,048,576 tokens of context. Costs approximately 535 tokens per message....

How to Use Chat with DeepSeek: DeepSeek V4 Pro

1
Enter your input

Type text, upload a file, or describe what you want. No account needed.

2
Click generate

Our AI processes your request in seconds using the best open-source models.

3
Download & share

Download, copy, or share your result. Free for personal and commercial use.

Use this tool via API

Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.

API Documentation Get API Key 
curl -X POST https://api.free.ai/v1/chat/ \
  -H "Authorization: Bearer sk-free-..." \
  -H "Content-Type: application/json" \
  -d '{"model": "qwen7b", "messages": [{"role": "user", "content": "Hello"}]}'

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Chat with DeepSeek: DeepSeek V4 Pro — FAQ

DeepSeek: DeepSeek V4 Pro is an AI model by DeepSeek on Free.ai. It supports up to 1,048,576 tokens of context. Costs approximately 535 tokens per message. Try DeepSeek: DeepSeek V4 Pro instantly — no sign up needed. Compare it side-by-side with other models.

DeepSeek: DeepSeek V4 Pro works well for general conversation, writing assistance, brainstorming, code help, and analysis. Try the sample prompts above to see its style.

About 535 tokens per average message. $1 buys 750,000 tokens, so even paid models cost cents per chat. Free accounts get 10,000 signup tokens plus a daily pool.

It depends on the task. /chat/compare/ lets you send the same prompt to DeepSeek: DeepSeek V4 Pro and any other model side-by-side — comparison is the fastest way to decide.

Yes. Outputs are yours — Free.ai does not claim rights to anything you generate.

1,048,576 tokens.

Replies stream token-by-token within ~1 second. Total response time depends on length and model size — small models stream faster, frontier models trade speed for depth.

Yes. Signed-in users see every chat in /account/?tab=history. You can also share a one-link copy of any conversation via the Share button.

Free.ai does not train models on your conversations. Self-hosted models stay on our GPUs. Premium models route to the upstream provider for inference.

Yes. POST to /v1/chat/ with model="deepseek/deepseek-v4-pro" and a messages array. Streaming SSE is supported. Full reference: /api/.

DeepSeek: DeepSeek V4 Pro is a premium model served by an external provider, so self-hosting is not available. Free.ai exposes it through token-based pricing.

Free accounts get 10,000 signup tokens plus a daily pool. When that runs out, top up starting at $1 (750K tokens) — no subscription required.

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4.2/5 from 9 ratings

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