--- title: Free Models Router API | Text Generation | ModelsLab description: Open-weight language models with configurable reasoning, native tool use, and efficient MoE architecture—optimized for production-grade reasoning. url: https://modelslab.com/models/openrouter/openrouter-free.md canonical: https://modelslab.com/models/openrouter/openrouter-free.md type: product component: Playground/LLM/Index generated_at: 2026-06-21T02:23:24.360776Z --- Free Models Router --- [LLMs.txt](https://modelslab.com/models/open_router/openrouter-free/llms.txt) [.md](https://modelslab.com/models/openrouter/openrouter-free.md) Free Models Router --- 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 ### Free Models Router openrouter openrouter-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) [#### marin/Marin 8B Instruct marin-community-marin-8b-instruct From $0.22/M tokens](https://modelslab.com/models/marin/marin-community-marin-8b-instruct) [#### open\_router/Amazon: Nova Pro 1.0 amazon-nova-pro-v1 From $2.00/M tokens](https://modelslab.com/models/open_router/amazon-nova-pro-v1) [#### open\_router/DeepSeek: R1 Distill Llama 70B deepseek-deepseek-r1-distill-llama-70b From $0.80/M tokens](https://modelslab.com/models/open_router/deepseek-deepseek-r1-distill-llama-70b) [#### open\_router/Qwen: Qwen3 Max Thinking qwen-qwen3-max-thinking From $2.34/M tokens](https://modelslab.com/models/open_router/qwen-qwen3-max-thinking) [#### together\_ai/Arize AI Qwen 2 1.5B Instruct arize-ai-qwen-2-1.5b-instruct From $0.10/M tokens](https://modelslab.com/models/together_ai/arize-ai-qwen-2-1.5b-instruct) [#### open\_router/Z.ai: GLM 5.2 z-ai-glm-5.2 From $2.65/M tokens](https://modelslab.com/models/open_router/z-ai-glm-5.2) [#### open\_router/Qwen: Qwen3.5 397B A17B qwen-qwen3.5-397b-a17b From $1.42/M tokens](https://modelslab.com/models/open_router/qwen-qwen3.5-397b-a17b) [#### open\_router/Meta: Llama 3.2 1B Instruct meta-llama-llama-3.2-1b-instruct From $0.11/M tokens](https://modelslab.com/models/open_router/meta-llama-llama-3.2-1b-instruct) [#### open\_router/ByteDance: UI-TARS 7B bytedance-ui-tars-1.5-7b From $0.15/M tokens](https://modelslab.com/models/open_router/bytedance-ui-tars-1.5-7b) [#### open\_router/Amazon: Nova Lite 1.0 amazon-nova-lite-v1 From $0.15/M tokens](https://modelslab.com/models/open_router/amazon-nova-lite-v1) [#### open\_router/Anthropic: Claude Opus 4.5 anthropic-claude-opus-4.5 From $15.00/M tokens](https://modelslab.com/models/open_router/anthropic-claude-opus-4.5) [#### scb10x/Typhoon 2 70B Instruct scb10x-scb10x-llama3-1-typhoon2-70b-instruct From $1.06/M tokens](https://modelslab.com/models/scb10x/scb10x-scb10x-llama3-1-typhoon2-70b-instruct) [#### open\_router/Qwen: Qwen3 30B A3B Instruct 2507 qwen-qwen3-30b-a3b-instruct-2507 From $0.12/M tokens](https://modelslab.com/models/open_router/qwen-qwen3-30b-a3b-instruct-2507) [#### open\_router/Mistral: Ministral 3 14B 2512 mistralai-ministral-14b-2512 From $0.20/M tokens](https://modelslab.com/models/open_router/mistralai-ministral-14b-2512) [#### open\_router/Google: Gemini 3.1 Flash Lite Preview google-gemini-3.1-flash-lite-preview From $0.88/M tokens](https://modelslab.com/models/open_router/google-gemini-3.1-flash-lite-preview) [#### arcee\_ai/Arcee AI Spotlight arcee\_ai-arcee-spotlight From $0.22/M tokens](https://modelslab.com/models/arcee_ai/arcee_ai-arcee-spotlight) [#### open\_router/Tencent: Hy3 preview tencent-hy3-preview From $0.14/M tokens](https://modelslab.com/models/open_router/tencent-hy3-preview) [#### open\_router/Writer: Palmyra X5 writer-palmyra-x5 From $3.30/M tokens](https://modelslab.com/models/open_router/writer-palmyra-x5) Open Source Alternatives --- Explore open-source models that offer similar capabilities with full transparency and flexibility [View all open source models](https://modelslab.com/models?feature=llm&provider=open-source-models) [MU Popular](https://modelslab.com/models/modelslab/uncensored-chat)[ModelsLab](https://modelslab.com/models/modelslab) [Modelslab: Uncensored Chat Open Source Model](https://modelslab.com/models/modelslab/uncensored-chat) About Free Models Router --- The simplest way to get free inference. openrouter/free is a router that selects free models at random from the models available on OpenRouter. The router smartly filters for models that support features needed for your request such as image understanding, tool calling, structured outputs and more. ### Technical Specifications Model IDopenrouter-free CategoryLLM Models TaskText Generation AddedFebruary 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 Free Models Router 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": "openrouter-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}") ``` ### 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 Openrouter](https://modelslab.com/models/open_router) [View Pricing](https://modelslab.com/pricing) Free Models Router FAQ --- ### What is Free Models Router? The simplest way to get free inference. openrouter/free is a router that selects free models at random from the models available on OpenRouter. The router smartly filters for models that support features needed for your request such as image understanding, tool calling, structured outputs and more. ### How do I use the Free Models Router API? You can integrate Free Models Router into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "openrouter-free" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### What is the Free Models Router model ID? The model ID for Free Models Router is "openrouter-free". Use this ID in your API requests to specify this model. ### Does Free Models Router have a free tier? Yes, ModelsLab offers a free tier that lets you try Free Models Router 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 - 2026-06-21*