--- title: DeepSeek: R1 0528 (free) API | Text Generation | ModelsLab description: Build with DeepSeek: R1 0528 (free) API by Deepseek. Text generation, chat, code, and reasoning. Pay-per-use. Free tier. url: https://modelslab.com/models/deepseek/deepseek-deepseek-r1-0528-free/api.md canonical: https://modelslab.com/models/deepseek/deepseek-deepseek-r1-0528-free/api.md type: product component: Playground/LLM/Index generated_at: 2026-05-01T18:31:13.187334Z --- DeepSeek: R1 0528 (free) --- [LLMs.txt](https://modelslab.com/models/open_router/deepseek-deepseek-r1-0528-free/llms.txt) [.md](https://modelslab.com/models/deepseek/deepseek-deepseek-r1-0528-free.md) deepseek-deepseek-r1-0528-free deepseek Closed Source Model DeepSeek: R1 0528 (free) --- Choose a prompt below to get started or type your own message Explain quantum computing in simple terms Write a Python function to sort a list Create a marketing email for a SaaS product Compare REST vs GraphQL APIs Send ### DeepSeek: R1 0528 (free) deepseek deepseek-deepseek-r1-0528-free Copy model ID PricingInput $0.00 / 1M tokens Output $0.00 / 1M tokens API EndpointsOpenAI Compatible `https://modelslab.com/api/v7/llm/chat/completions`Endpoint Anthropic Compatible `https://modelslab.com/api/v7/llm/v1/messages`Messages `https://modelslab.com/api/v7/llm/v1/messages/count_tokens`Count Tokens `https://modelslab.com/api/v7/llm/v1/models`Models Use with Claude Code cURL Example ParametersSystem MessageYou are a helpful AI assistant specialized in providing accurate and detailed responses. Temperature0.7 Max Tokens1000 Top P0.9 Frequency Penalty0 Presence Penalty0 Model Info Support Related Models --- Discover similar models you might be interested in [View all LLM Models](https://modelslab.com/models?feature=llmaster) [N3](https://modelslab.com/models/together_ai/nim-meta-llama-3.2-90b-vision-instruct)[Together AI](https://modelslab.com/models/together_ai) [nim/meta/llama-3.2-90b-vision-instruct Closed Source Model](https://modelslab.com/models/together_ai/nim-meta-llama-3.2-90b-vision-instruct) [GO](https://modelslab.com/models/together_ai/zai-org-GLM-OCR)[Together AI](https://modelslab.com/models/together_ai) [GLM OCR Closed Source Model](https://modelslab.com/models/together_ai/zai-org-GLM-OCR) [MM](https://modelslab.com/models/together_ai/MiniMaxAI-MiniMax-M1-40k)[Together AI](https://modelslab.com/models/together_ai) [Minimax M1 40K Closed Source Model](https://modelslab.com/models/together_ai/MiniMaxAI-MiniMax-M1-40k) [N3](https://modelslab.com/models/together_ai/nim-meta-llama-3.1-70b-instruct)[Together AI](https://modelslab.com/models/together_ai) [nim/meta/llama-3.1-70b-instruct Closed Source Model](https://modelslab.com/models/together_ai/nim-meta-llama-3.1-70b-instruct) [ML](https://modelslab.com/models/together_ai/meta-llama-Llama-3.1-405B-Instruct)[Together AI](https://modelslab.com/models/together_ai) [Meta Llama 3.1 405B Instruct Closed Source Model](https://modelslab.com/models/together_ai/meta-llama-Llama-3.1-405B-Instruct) [MM](https://modelslab.com/models/open_router/mistralai-mistral-medium-3)[Open Router](https://modelslab.com/models/open_router) [Mistral: Mistral Medium 3 Closed Source Model](https://modelslab.com/models/open_router/mistralai-mistral-medium-3) [ZG](https://modelslab.com/models/open_router/z-ai-glm-4.7-flash)[Open Router](https://modelslab.com/models/open_router) [Z.ai: GLM 4.7 Flash Closed Source Model](https://modelslab.com/models/open_router/z-ai-glm-4.7-flash) [MK](https://modelslab.com/models/open_router/moonshotai-kimi-k2)[Open Router](https://modelslab.com/models/open_router) [MoonshotAI: Kimi K2 0711 Closed Source Model](https://modelslab.com/models/open_router/moonshotai-kimi-k2) [MM](https://modelslab.com/models/open_router/minimax-minimax-m2.1)[Open Router](https://modelslab.com/models/open_router) [MiniMax: MiniMax M2.1 Closed Source Model](https://modelslab.com/models/open_router/minimax-minimax-m2.1) [G5](https://modelslab.com/models/together_ai/zai-org-GLM-5.1)[Together AI](https://modelslab.com/models/together_ai) [GLM 5.1 FP4 Closed Source Model](https://modelslab.com/models/together_ai/zai-org-GLM-5.1) [GG](https://modelslab.com/models/open_router/google-gemini-2.5-pro-preview-05-06)[Open Router](https://modelslab.com/models/open_router) [Google: Gemini 2.5 Pro Preview 05-06 Closed Source Model](https://modelslab.com/models/open_router/google-gemini-2.5-pro-preview-05-06) [MV](https://modelslab.com/models/open_router/mistralai-voxtral-small-24b-2507)[Open Router](https://modelslab.com/models/open_router) [Mistral: Voxtral Small 24B 2507 Closed Source Model](https://modelslab.com/models/open_router/mistralai-voxtral-small-24b-2507) [MM](https://modelslab.com/models/open_router/minimax-minimax-m2.7)[Open Router](https://modelslab.com/models/open_router) [MiniMax: MiniMax M2.7 Closed Source Model](https://modelslab.com/models/open_router/minimax-minimax-m2.7) [LL](https://modelslab.com/models/open_router/liquid-lfm-2-24b-a2b)[Open Router](https://modelslab.com/models/open_router) [LiquidAI: LFM2-24B-A2B Closed Source Model](https://modelslab.com/models/open_router/liquid-lfm-2-24b-a2b) [CC](https://modelslab.com/models/open_router/cohere-command-a)[Open Router](https://modelslab.com/models/open_router) [Cohere: Command A Closed Source Model](https://modelslab.com/models/open_router/cohere-command-a) [ML](https://modelslab.com/models/open_router/meta-llama-llama-3.2-1b-instruct)[Open Router](https://modelslab.com/models/open_router) [Meta: Llama 3.2 1B Instruct Closed Source Model](https://modelslab.com/models/open_router/meta-llama-llama-3.2-1b-instruct) [QQ](https://modelslab.com/models/open_router/qwen-qwen3.6-35b-a3b)[Open Router](https://modelslab.com/models/open_router) [Qwen: Qwen3.6 35B A3B Closed Source Model](https://modelslab.com/models/open_router/qwen-qwen3.6-35b-a3b) [QV](https://modelslab.com/models/together_ai/Qwen-Qwen2-VL-72B-Instruct)[Together AI](https://modelslab.com/models/together_ai) [Qwen2-VL (72B) Instruct Closed Source Model](https://modelslab.com/models/together_ai/Qwen-Qwen2-VL-72B-Instruct) About DeepSeek: R1 0528 (Free) --- May 28th update to the \[original DeepSeek R1\](/deepseek/deepseek-r1) Performance on par with \[OpenAI o1\](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active in an inference pass. Fully open-source model. ### Technical Specifications Model IDdeepseek-deepseek-r1-0528-freeCategoryLLM ModelsTaskText GenerationAddedFebruary 20, 2026 ### Key Features - Chat completion and multi-turn conversation API - Streaming response with token-by-token output - Function calling and tool use support - System prompts and role-based messaging - JSON mode and structured output ### Quick Start Integrate DeepSeek: R1 0528 (Free) into your application with a single API call. Get your API key from the [pricing page](https://modelslab.com/pricing) to get started. PythonJavaScriptcURLPHP ``` import requests import json url = "https://modelslab.com/api/v7/llm/chat/completions" headers = { "Content-Type": "application/json" } data = { "model_id": "deepseek-deepseek-r1-0528-free", "messages": [ { "role": "user", "content": "Hello!" } ], "max_tokens": 1000, "key": "YOUR_API_KEY" } try: response = requests.post(url, headers=headers, json=data) response.raise_for_status() # Raises an HTTPError for bad responses (4XX or 5XX) result = response.json() print("API Response:") print(json.dumps(result, indent=2)) except requests.exceptions.HTTPError as http_err: print(f"HTTP error occurred: {http_err} - {response.text}") except Exception as err: print(f"Other error occurred: {err}") ``` View the [full API documentation](https://modelslab.com/models/deepseek/deepseek-deepseek-r1-0528-free/api) for SDKs, code examples in Python, JavaScript, and more. ### Use Cases - AI chatbots and virtual assistants - Code generation and developer tools - Content writing and copywriting automation - Data analysis, summarization, and extraction [Browse LLM Models](https://modelslab.com/models?feature=llmaster) [More from Deepseek](https://modelslab.com/models/open_router) [View Pricing](https://modelslab.com/pricing) DeepSeek: R1 0528 (Free) FAQ --- ### What is DeepSeek: R1 0528 (Free)? May 28th update to the \[original DeepSeek R1\](/deepseek/deepseek-r1) Performance on par with \[OpenAI o1\](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active in an inference pass. Fully open-source model. ### How do I use the DeepSeek: R1 0528 (Free) API? You can integrate DeepSeek: R1 0528 (Free) into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "deepseek-deepseek-r1-0528-free" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### What is the DeepSeek: R1 0528 (Free) model ID? The model ID for DeepSeek: R1 0528 (Free) is "deepseek-deepseek-r1-0528-free". Use this ID in your API requests to specify this model. ### Does DeepSeek: R1 0528 (Free) have a free tier? Yes, ModelsLab offers a free tier that lets you try DeepSeek: R1 0528 (Free) and other AI models. Sign up to get free API credits and start building immediately. --- *This markdown version is optimized for AI agents and LLMs.* **Links:** - [Website](https://modelslab.com) - [API Documentation](https://docs.modelslab.com) - [Blog](https://modelslab.com/blog) --- *Generated by ModelsLab - 2026-05-02*