DeepSeek: One-stop "Thinking + Creation" AI assistant and API, the king of true cost-effectiveness
If you often need to write, program, and do research, and are often tormented by "slow reasoning, expensive price, and docking trouble", then DeepSeek is definitely worth a try. This is an AI tool that takes into account both personal assistants and developer APIs, and the biggest highlight is "strong reasoning ability + price friendliness". I used DeepSeek-V3.1 to polish a 1500-word official document and fix the code, and it was done in 5 minutes, which increased efficiency by 3 times.
1. What is DeepSeek
? To put it simply, DeepSeek is a family of AI tools and models covering apps and APIs, including deepseek-chat for conversation creation and deepseek-reasoner for complex reasoning(Now all upgraded to V3.1). It is developed by Hangzhou Deep Quest Artificial Intelligence Basic Technology Research Co., Ltd., mainly to help users complete tasks such as writing, Q&A, translation, problem solving, code generation/repair, and agent automation. Compared with traditional methods, DeepSeek's advantages are: stronger reasoning, API compatible with OpenAI interface, and cheaper price.
Core features include:
- Conversation authoring (deepseek-chat): A versatile model for writing, summarization, translation, and multilingual conversations.
- Deepseek-Reasoner: Oriented to complex reasoning and link thinking, suitable for problem-solving and solution demonstration.
- Developer API: Supports OpenAI-style and strict function calls (strict), with a context of 128K, which is convenient for migration.
2. Who needs DeepSeek the most
1. Content creators/new media operations
If you are a writer or short video script editor who often needs to quickly generate or rewrite copy, DeepSeek can output high-quality documents at a lower cost. I used deepseek-chat to polish the spoken draft into an official document, which was completed in only 45 seconds, with a unified tone and improved typos and logic.
2. Developer/technical team
For engineers, DeepSeek is a code assistant. It can automatically fix code, explain errors, and generate test cases, reducing the original half-day troubleshooting to less than a minute. V3.1 has better performance on developer benchmarks and enhanced stability.
3. Researchers and analysts
When encountering complex reasoning and long-chain calculations, the "thinking mode" of deepseek-reasoner can obtain clear intermediate steps and conclusions, which is especially suitable for scientific research demonstration, mathematical problem solving and multi-tool collaboration.
3. DeepSeek's killer features
1. V3.1 "Hybrid Reasoning Architecture" can
freely switch between "non-thinking mode" and "thinking mode" with just one click. For example, when generating marketing copy, I asked it to give logical links and audience assumptions at the same time, and the results were clear and reasonable.
2. OpenAI style compatible + strict function call
API is almost completely compatible with OpenAI, and the migration cost is low; The function call field in strict mode is stable and will not "deviate", which is especially useful in database queries and RAG retrieval.
3. MoE architecture + large context
DeepSeek-V3 adopts an expert hybrid architecture, taking into account both performance and speed. V3.1 goes a step further in terms of agent capabilities, supporting 128K contexts and handling long documents and multiple rounds of conversations with ease.
4. Charges
Free version:
- Includes functions: web version and App dialogue experience, supporting writing, translation, problem solving, etc.
- Usage Limitations: High concurrency and long conversations are limited, making it suitable for lightweight personal use.
- Who is it for: Students, light office and content creators.
Paid version (API):
- Price (million tokens):
- deepseek-chat (non-thinking mode): input $0.27, output $1.10
- deepseek-reasoner (thinking mode): $0.55 for input, $2.19 for output
- Unlock features: high concurrency, 128K context, function call (strict), and more stable engineering capabilities.
- Cost-Performance Analysis: Compared to similar inference models, DeepSeek is cheaper, especially more friendly than higher-priced models like OpenAI o1-pro.
My advice:
- Everyday use: the free version is sufficient.
- Team development: API is mainly deepseek-chat, and reasoner is used for complex reasoning.
- Long documents and scientific research: Go directly to the V3.1 thinking mode.
5. Practical skills
1. Thinking mode "on-demand" Ordinary
tasks are not open to the thinking mode, and complex reasoning can be opened again, which can greatly reduce costs.
2. Call the strict function as an Agent skeleton
Afterdefining the function schema, turn on strict, and the return field is more controllable, eliminating post-processing logic, which is especially suitable for RAG.
3. Prompt library as a template library
Save prompts for commonly used tasks as templates and share them with the team, which can be stably output and double efficiency.
6. Comparison of similar tools
- Compared with the OpenAI o1 series:D eepSeek is more cost-effective in the direction of strong reasoning; O1-Pro is the most powerful but expensive for budget-tight teams.
- Compared with Google Gemini 2.0 Flash: Flash is strong in terms of low price and throughput, but the comprehensive experience of Chinese writing and reasoning is more balanced and API docking is more convenient.
Overall, DeepSeek is best suited for individuals and teams who juggle writing and reasoning, especially for Chinese tasks and engineering.
7. Summary
DeepSeek is a "ready-to-use" AI tool. It is best suited for content creators, developers, and researchers, especially in scenarios that require reasoning + cost control.
- Content Creators: Highly recommended to try;
- Student/Office: The free version is sufficient;
- Development team: Use API to build a toolchain, and the chat+reasoner combination is the most cost-effective.
Final reminder: V3.1 is live, API prices are being adjusted, and it is best for the team to do a cost test before using it.
Frequently Asked Questions (Q&A)
Q: Is DeepSeek really cheaper than OpenAI?
A: In terms of millions of tokens, deepseek-chat input is $0.27 and output is $1.10, and deepseek-reasoner input is $0.55 and output is $2.19, which is several times cheaper than o1-pro.
Q: What's so special about V3.1?
A: V3.1 supports hybrid inference architecture, and you can freely choose non-thinking or thinking mode in the API, and the agent ability is stronger.
Q: Is it difficult for developers to migrate?
A: It's not difficult, the API is compatible with OpenAI format, just change the base_url and key; strict function calls are also more stable.
