DeepSeek V4 Pro
Access DeepSeek V4 Pro through one API key. Frontier reasoning at a fraction of flagship pricing.
DeepSeek's V4-generation flagship: 1.6T-parameter MoE with 49B activated, 1M token context, built for advanced reasoning, coding, and agentic workflows.
No credit card required. Takes 30 seconds.
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Try it live
Send a message and see DeepSeek V4 Pro respond in real time.
Maximum tokens in the response.
Real-time tokens
Context Window
1.0M tokens
Max Output
384K tokens
Input Price
$0.85 / 1M tokens
Output Price
$1.71 / 1M tokens
Strengths
Accepts up to 1,048,576 input tokens, enabling reasoning over entire codebases and large document collections.
A 1.6T-parameter MoE with 49B activated, built for deep multi-step reasoning and complex problem solving.
High-quality code generation, review, and multi-file editing across languages, a core V4 Pro focus.
Tuned for tool use and multi-step agentic tasks, supported by the 1M context and 384K output ceiling.
Quick start
Copy this snippet and start making calls with DeepSeek V4 Pro.
const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "deepseek/deepseek-v4-pro",
"messages": [
{
"role": "user",
"content": "Explain API gateways in 2 sentences."
}
],
"maxTokens": 256
}),
});
const { data } = await res.json();
console.log(data.message.content);Why use DeepSeek V4 Pro through YepAPI?
DeepSeek V4 Pro API: frontier reasoning at budget pricing
DeepSeek V4 Pro is DeepSeek's V4-generation flagship, a 1.6T-parameter MoE with 49B activated, built for advanced reasoning, coding, and agentic workflows with a 1M-token context. YepAPI serves it through one OpenAI-compatible endpoint.
Your single YepAPI key also reaches Claude, Grok, Gemini, Kimi, and more, plus SEO, SERP, and scraping endpoints, so a frontier reasoning model can drive agents over your data tools.
What is DeepSeek V4 Pro?
DeepSeek V4 Pro is the flagship of DeepSeek's V4 generation, a mixture-of-experts model with 1.6 trillion total parameters and 49 billion activated per token. That scale targets frontier-level reasoning, coding, and agentic workflows while keeping inference efficient through MoE. It offers a 1,048,576-token context window and a 384,000-token output ceiling, so it can reason across entire codebases and large document sets and still produce long, detailed responses. Positioned as DeepSeek's most capable model, V4 Pro is built for the hardest tasks, deep reasoning, complex coding, and multi-step agents, at a fraction of premium-flagship pricing.
Build with DeepSeek V4 Pro via YepAPI
Call YepAPI's OpenAI-compatible /v1/ai/chat endpoint with any OpenAI client; tool/function calling uses the standard schema. Set the base URL, add your key, and set the model string to DeepSeek V4 Pro. Switching models is a single string change. Because the same key reaches the full catalog, your agents can use V4 Pro for the hardest reasoning and call cheaper models or YepAPI's SEO and scraping endpoints for routine steps, all from one integration.
DeepSeek V4 Pro API pricing — $0.85 input / $1.71 output per 1M tokens
DeepSeek V4 Pro costs $0.85 per 1M input tokens and $1.71 per 1M output tokens. For a flagship offering frontier reasoning, strong coding, and a 1M context window, this is remarkable value, a small fraction of what comparable premium flagships charge. Per-token billing means you can run demanding reasoning and agentic workloads at scale without the cost typically attached to top-tier models.
DeepSeek V4 Pro for advanced reasoning and agentic coding
DeepSeek V4 Pro is built for the toughest work: deep multi-step reasoning, complex code generation and review across many files, and agentic workflows that plan and call tools. Its 1M context lets it hold whole repositories and reference material, and the 384K output ceiling supports long, detailed results. When you need flagship-level capability for reasoning or autonomous coding agents but want to keep cost manageable, V4 Pro is the standout choice.
Try DeepSeek V4 Pro free
New YepAPI accounts include $5 of free credit with no card required. That lets you put DeepSeek V4 Pro through real reasoning and coding tasks, test it inside an agent with tool calls, and compare it against premium models on the same key, all before committing to any payment method.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
DeepSeek's V4-generation flagship: 1.6T-parameter MoE with 49B activated, 1M token context, built for advanced reasoning, coding, and agentic workflows.
Input tokens cost $0.85 per 1M tokens and output tokens cost $1.71 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.
Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.
DeepSeek V4 Pro supports a 1.0M token context window with up to 384K output tokens per request.
Ready to use DeepSeek V4 Pro?
$5 free credit on signup. No credit card required. Pay per call.
Explore more models
DeepSeek V3
DeepSeekAccess DeepSeek V3 through one API key. Frontier-level coding at a fraction of the cost.
DeepSeek R1
DeepSeekAccess DeepSeek R1 through one API key. Reasoning-specialized model for complex problems.
DeepSeek V3.2
DeepSeekAccess DeepSeek V3.2 through one API key. Latest DeepSeek model.