--- 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.md canonical: https://modelslab.com/models/deepseek/deepseek-deepseek-r1-0528-free.md type: product component: Playground/LLM/Index generated_at: 2026-05-01T17:07:42.007238Z --- 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) [DR](https://modelslab.com/models/together_ai/deepseek-ai-DeepSeek-R1-Distill-Llama-70B)[Together AI](https://modelslab.com/models/together_ai) [DeepSeek R1 Distill Llama 70B Closed Source Model](https://modelslab.com/models/together_ai/deepseek-ai-DeepSeek-R1-Distill-Llama-70B) [OG](https://modelslab.com/models/open_router/openai-gpt-oss-120b)[Open Router](https://modelslab.com/models/open_router) [OpenAI: gpt-oss-120b Closed Source Model](https://modelslab.com/models/open_router/openai-gpt-oss-120b) [OG](https://modelslab.com/models/open_router/openai-gpt-5)[Open Router](https://modelslab.com/models/open_router) [OpenAI: GPT-5 Closed Source Model](https://modelslab.com/models/open_router/openai-gpt-5) [QQ](https://modelslab.com/models/open_router/qwen-qwen3.5-397b-a17b)[Open Router](https://modelslab.com/models/open_router) [Qwen: Qwen3.5 397B A17B Closed Source Model](https://modelslab.com/models/open_router/qwen-qwen3.5-397b-a17b) [QN](https://modelslab.com/models/together_ai/Qwen-Qwen3-Next-80B-A3B-Thinking)[Together AI](https://modelslab.com/models/together_ai) [Qwen3 Next 80B A3b Thinking Closed Source Model](https://modelslab.com/models/together_ai/Qwen-Qwen3-Next-80B-A3B-Thinking) [Q1](https://modelslab.com/models/together_ai/Qwen-Qwen3.5-122B-A10B-FP8)[Together AI](https://modelslab.com/models/together_ai) [Qwen3.5 122B A10b Fp8 Closed Source Model](https://modelslab.com/models/together_ai/Qwen-Qwen3.5-122B-A10B-FP8) [PI](https://modelslab.com/models/open_router/prime-intellect-intellect-3)[Open Router](https://modelslab.com/models/open_router) [Prime Intellect: INTELLECT-3 Closed Source Model](https://modelslab.com/models/open_router/prime-intellect-intellect-3) [GN](https://modelslab.com/models/open_router/google-gemini-3.1-flash-image-preview)[Open Router](https://modelslab.com/models/open_router) [Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) Closed Source Model](https://modelslab.com/models/open_router/google-gemini-3.1-flash-image-preview) [TD](https://modelslab.com/models/open_router/tngtech-deepseek-r1t2-chimera)[Open Router](https://modelslab.com/models/open_router) [TNG: DeepSeek R1T2 Chimera Closed Source Model](https://modelslab.com/models/open_router/tngtech-deepseek-r1t2-chimera) [XM](https://modelslab.com/models/open_router/xiaomi-mimo-v2-pro)[Open Router](https://modelslab.com/models/open_router) [Xiaomi: MiMo-V2-Pro Closed Source Model](https://modelslab.com/models/open_router/xiaomi-mimo-v2-pro) [DR](https://modelslab.com/models/together_ai/deepseek-ai-DeepSeek-R1-Distill-Qwen-7B)[Together AI](https://modelslab.com/models/together_ai) [DeepSeek R1 Distill Qwen 7B Closed Source Model](https://modelslab.com/models/together_ai/deepseek-ai-DeepSeek-R1-Distill-Qwen-7B) [MD](https://modelslab.com/models/open_router/mistralai-devstral-medium)[Open Router](https://modelslab.com/models/open_router) [Mistral: Devstral Medium Closed Source Model](https://modelslab.com/models/open_router/mistralai-devstral-medium) [Q3](https://modelslab.com/models/together_ai/Qwen-Qwen3-30B-A3B)[Together AI](https://modelslab.com/models/together_ai) [Qwen3 30B A3b Closed Source Model](https://modelslab.com/models/together_ai/Qwen-Qwen3-30B-A3B) [MP](https://modelslab.com/models/open_router/mistralai-pixtral-large-2411)[Open Router](https://modelslab.com/models/open_router) [Mistral: Pixtral Large 2411 Closed Source Model](https://modelslab.com/models/open_router/mistralai-pixtral-large-2411) [DS](https://modelslab.com/models/together_ai/mistralai-Devstral-Small-2505)[Together AI](https://modelslab.com/models/together_ai) [Devstral Small 2505 Closed Source Model](https://modelslab.com/models/together_ai/mistralai-Devstral-Small-2505) [M(](https://modelslab.com/models/together_ai/mistralai-Mistral-7B-Instruct-v0.3)[Together AI](https://modelslab.com/models/together_ai) [Mistral (7B) Instruct v0.3 Closed Source Model](https://modelslab.com/models/together_ai/mistralai-Mistral-7B-Instruct-v0.3) [GG](https://modelslab.com/models/open_router/google-gemini-3.1-pro-preview)[Open Router](https://modelslab.com/models/open_router) [Google: Gemini 3.1 Pro Preview Closed Source Model](https://modelslab.com/models/open_router/google-gemini-3.1-pro-preview) [Q4](https://modelslab.com/models/together_ai/Qwen-Qwen3-4B-Instruct-2507)[Together AI](https://modelslab.com/models/together_ai) [Qwen3 4B Instruct 2507 Closed Source Model](https://modelslab.com/models/together_ai/Qwen-Qwen3-4B-Instruct-2507) 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 - 2026-05-01*