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DeepSeek V4 Pro is DeepSeek’s flagship open-weights Mixture-of-Experts language model with a 1 million token context window and strong reasoning and coding capabilities. It is notable for combining frontier-level performance with open licensing and relatively low-cost deployment options.
Output tokens per second · Higher is better
Seconds · Lower is better
USD per 1M tokens (blended) · Lower is better
About the model
DeepSeek V4 Pro is a 1.6-trillion-parameter Mixture-of-Experts large language model from DeepSeek with around 49 billion activated parameters and a 1 million token context window. It is mainly used for advanced reasoning tasks such as complex problem solving, long-horizon agent workflows, and high-end software engineering and coding assistance. It is also used for long-context analysis, knowledge-intensive question answering, and tool-using applications that require function calling and structured outputs. It belongs to the DeepSeek V4 family and succeeds earlier DeepSeek models such as DeepSeek-R1 and prior V-series models.
Model capabilities
Engages in multi-turn conversations, follows complex instructions, and maintains context across long interactions for diverse assistant-style tasks.
Analyzes input images, recognizing objects and visual details to support tasks like description, comparison, and visual reasoning.
Supports reviewing and reasoning about code or logs, helping detect issues, explain behavior, and guide debugging steps.
Translates between multiple languages, preserving key meaning and style for everyday text and technical content.
Extracts and interprets textual content from provided images, enabling downstream understanding, search, and transformation of visual documents.
Use cases
Transparent pricing
LLM API offers the lowest cost and latency for DeepSeek V4 Pro–class models.
| Provider | Region | Latency | Throughput | Uptime | Input ($/1M) | Output ($/1M) | Context |
|---|---|---|---|---|---|---|---|
| LLM API BEST | Global | 120ms | 120 tps | 99.99% | $0.20 | $0.40 | 256K |
| DeepSeek | Global | ~180ms | ~80 tps | ~99.9% | ~$0.30 | ~$0.60 | ~200K |
| OpenRouter | Global | ~220ms | ~60 tps | ~99.9% | ~$0.35 | ~$0.70 | ~128K |
| Together AI | US East | ~210ms | ~70 tps | ~99.9% | ~$0.32 | ~$0.64 | ~128K |
| Fireworks AI | US West | ~200ms | ~75 tps | ~99.9% | ~$0.34 | ~$0.68 | ~200K |
Performance benchmarks
| Metric | DeepSeek V4 Pro | OpenAI GPT-4.1 | Anthropic Claude 3.5 Sonnet |
|---|---|---|---|
| Avg Latency | ~180ms | ~250ms | ~220ms |
| Context Window | 128K | 128K | 200K |
| Input Price ($/1M tokens) | $0.80 | $5.00 | $3.00 |
| Output Price ($/1M tokens) | $2.40 | $15.00 | $15.00 |
| Max Output Tokens | 8K | 4K | 4K |
| Throughput | 60 tps | 30 tps | 25 tps |
| Uptime | 99.9% | 99.9% | 99.9% |
30-day usage via LLM API
Architecture & Integration
One unified API. Every major model. Built-in reliability, cost control, and observability.
Automatically route each request to the best model across providers based on latency, cost, and quality—without changing your integration or redeploying.
One endpoint. Any model.Control spend with configurable policies that downshift to cheaper models when possible and reserve premium models only where they truly matter.
Optimize quality per dollar.Eliminate single-provider downtime with automatic fallbacks that retry on alternate models and regions while preserving request shape and semantics.
Stay up when APIs fail.Get full visibility into tokens, latency, errors, and provider health with request-level traces that plug into your existing monitoring stack.
See every token hop.Define tasks like chat, tools, or RAG once and let LLM.API handle provider-specific quirks, parameters, and response formats for you.
Code to tasks, not vendors.Run massive inference and evaluation workloads with parallelized, rate-safe batching that maximizes throughput across providers without throttling or manual sharding.
Scale jobs, not scripts.Decision guide
FAQ
DeepSeek V4 Pro is a large language model by DeepSeek focused on strong reasoning, coding, and general-purpose text generation.
DeepSeek V4 Pro is available as a text-only model on LLM.API, accepting text prompts and returning text completions or chat responses.
DeepSeek V4 Pro is billed on a pay-as-you-go basis per thousand input and output tokens, with exact rates shown in your LLM.API pricing dashboard.
DeepSeek V4 Pro supports a large-context window suitable for long conversations and multi-file coding tasks; check LLM.API docs for the current token limit.
DeepSeek V4 Pro generally returns first tokens within a few seconds, with total latency depending on prompt size, response length, and LLM.API load.
DeepSeek V4 Pro is best for complex reasoning, code generation and debugging, data analysis assistance, and high-quality general-purpose writing.
You select the DeepSeek V4 Pro model name in your LLM.API request payload, pass your prompt as messages or text, and authenticate with your API key.
DeepSeek V4 Pro offers competitive reasoning and coding quality, often at a lower token cost than many frontier models from larger providers.
DeepSeek V4 Pro can still hallucinate, may lack very recent knowledge, and should not be trusted alone for high-stakes legal, financial, or medical decisions.
Yes, DeepSeek V4 Pro can stream tokens incrementally when you enable streaming in your LLM.API request, reducing perceived latency for long outputs.
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