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DeepSeek V4 Pro

The price collapse — frontier quality at a fraction of the cost.

DeepSeek V4 Pro is a flagship large language model developed by DeepSeek, designed for advanced text-based AI applications. The model is distinguished by its extraordinary 1,048,576-token context window, enabling it to process extensive text inputs, maintain long conversational threads, and handle intricate cross-referencing tasks.

DeepSeek V4 Pro features state-of-the-art advancements in transformer-based architectures and training methodologies, enhancing its capabilities in text comprehension and generation, with a focus on delivering accuracy, coherence, and scalability for complex tasks and broad domain versatility.

DeepSeek V4 Pro is the latest addition to the DeepSeek flagship series, representing significant advancements in context window size, text generation quality, and reasoning capabilities over earlier versions. Its expanded token capacity and refined architecture make it well-suited for tasks requiring deep contextual understanding and extended input analysis.

Background

Hangzhou DeepSeek Artificial Intelligence Basic Technology Research Co., Ltd., doing business as DeepSeek, is a Chinese artificial intelligence (AI) company that develops large language models (LLMs). Based in Hangzhou, Zhejiang, DeepSeek is owned and funded by High-Flyer, a Chinese hedge fund. DeepSeek was founded in July 2023 by Liang Wenfeng, the co-founder of High-Flyer, who also serves as the CEO for both of the companies. The company launched an eponymous chatbot alongside its DeepSeek-R1 model in January 2025.

Wikipedia

Specs

Context window: 1.0M tokens
Max output: 384K tokens
Input ($/1M tokens): $0.435
Output ($/1M tokens): $0.870
Cached input ($/1M): $0.070
Modalities: Text
Released: Dec 26, 2024
Weights: Open

Pricing last synced Apr 27, 2026 via OpenRouter. Confirm against official docs before committing.

Capabilities

Tool use
Vision
Extended thinking
Prompt caching
Open weights

What it excels at

Massive context window
Handles inputs up to 1,048,576 tokens, enabling cross-referencing and understanding of large text sequences.
Advanced text generation
Produces coherent, contextually appropriate text over extensive passages.
High reasoning depth
Excels in complex tasks requiring logical consistency and multi-step analysis.
Versatility across domains
Extensive training on diverse datasets ensures applicability to a wide range of tasks.

When to use this model

→Document summarization and analysis — Processes and synthesizes information from lengthy, complex documents.
→Technical content generation — Creates precise, contextually relevant text for documentation and technical writing.
→Complex query handling — Answers intricate questions by analyzing extensive textual data.
→Long-form conversational AI — Maintains coherence and context across extended conversational threads.

Analysis synthesized from gpt-4o, llama-4-maverick, phi-4, etc.

API model id

deepseek-chat

Vendor docs: api-docs.deepseek.com

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