DeepSeek Chat API
DeepSeek Chat API is a high-performance general-purpose chat model built by DeepSeek. With a 128K context window and highly competitive pricing, it delivers strong results across coding, reasoning, and conversational tasks. Access it on EvoLink with the documented model enum.
PRICING
| PLAN | CONTEXT WINDOW | MAX OUTPUT | INPUT | OUTPUT | CACHE READ |
|---|---|---|---|---|---|
| DeepSeek Chat | 128.0K | 8.2K | $0.278 $0.278Official Price | $0.417 $0.417Official Price | $0.028 $0.028Official Price |
Pricing Note: Price unit: USD / 1M tokens
Cache Hit: Price applies to cached prompt tokens.
DeepSeek Chat API for Cost-Effective AI
DeepSeek Chat (V3) delivers frontier-level performance at a fraction of the cost. With a 128K context window, prompt caching support, and strong coding and reasoning capabilities, it is an excellent choice for teams that need quality AI without premium pricing.
What can you build with the DeepSeek Chat API?
Conversational AI Assistants
DeepSeek Chat API excels at building intelligent chatbots and virtual assistants. Its strong instruction-following ability and natural language understanding make it ideal for customer support, knowledge bases, and interactive Q&A systems.
Code Generation & Analysis
DeepSeek Chat delivers competitive coding performance across multiple programming languages. Use it for code generation, debugging, code review, and technical documentation — all at a fraction of the cost of premium models.
Content Creation & Summarization
With its 128K context window, DeepSeek Chat can process long documents, generate structured content, and produce accurate summaries. It handles translation, copywriting, and report generation with high quality output.
Why teams choose the DeepSeek Chat API
DeepSeek Chat API combines strong general-purpose performance with highly competitive pricing, making quality AI accessible for teams of all sizes.
Highly Competitive Pricing
DeepSeek Chat offers frontier-level quality at significantly lower cost than comparable models.
128K Context Window
Process long documents, codebases, and multi-turn conversations with a generous 128K token context.
Prompt Caching Support
Reduce costs further with built-in prompt caching for repeated prefixes and system prompts.
How to integrate the DeepSeek Chat API
Use the EvoLink API with the documented model enum and required fields. DeepSeek Chat is fully compatible with the OpenAI SDK — just change the base URL.
Step 1 — Authenticate
Create an EvoLink API key and send requests with Bearer token authentication.
Step 2 — Set required fields
Provide model: deepseek-chat, and a messages array with role and content fields.
Step 3 — Tune outputs
Adjust temperature, top_p, max_tokens, stop, stream, and other parameters for your use case.
Core DeepSeek Chat API capabilities
Model facts from DeepSeek, plus EvoLink access details
Frontier-Level Performance
DeepSeek Chat (V3) delivers competitive results on major benchmarks, rivaling models that cost significantly more.
128K Context Window
Process long documents, extensive codebases, and complex multi-turn conversations within a single request.
Prompt Caching
Built-in prompt caching reduces costs for repeated system prompts and prefixes, ideal for production workloads.
OpenAI SDK Compatible
Fully compatible with the OpenAI SDK. Switch to DeepSeek Chat by changing the base URL and model name — no code rewrite needed.
Strong Coding Ability
Competitive performance on coding benchmarks across Python, JavaScript, TypeScript, and other popular languages.
Multilingual Support
Strong performance in both English and Chinese, with solid capabilities across other major languages.
DeepSeek Chat API FAQs
Everything you need to know about the product and billing.