--- title: Qwen3 4B Instruct 2507 API | Text Generation | ModelsLab description: Build with Qwen3 4B Instruct 2507 API by Qwen. Text generation, chat, code, and reasoning. Pay-per-use. Free tier. url: https://modelslab.com/models/Qwen/Qwen-Qwen3-4B-Instruct-2507/api.md canonical: https://modelslab.com/models/Qwen/Qwen-Qwen3-4B-Instruct-2507/api.md type: product component: Playground/LLM/Index generated_at: 2026-04-15T01:59:40.992900Z --- Qwen3 4B Instruct 2507 --- [LLMs.txt](https://modelslab.com/models/together_ai/Qwen-Qwen3-4B-Instruct-2507/llms.txt) [.md](https://modelslab.com/models/Qwen/Qwen-Qwen3-4B-Instruct-2507.md) Qwen-Qwen3-4B-Instruct-2507 Qwen Closed Source Model Qwen3 4B Instruct 2507 --- 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 ### Qwen3 4B Instruct 2507 Qwen Qwen-Qwen3-4B-Instruct-2507 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) [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) [AC](https://modelslab.com/models/open_router/alfredpros-codellama-7b-instruct-solidity)[Open Router](https://modelslab.com/models/open_router) [AlfredPros: CodeLLaMa 7B Instruct Solidity Closed Source Model](https://modelslab.com/models/open_router/alfredpros-codellama-7b-instruct-solidity) [MM](https://modelslab.com/models/open_router/mistralai-mixtral-8x7b-instruct)[Open Router](https://modelslab.com/models/open_router) [Mistral: Mixtral 8x7B Instruct Closed Source Model](https://modelslab.com/models/open_router/mistralai-mixtral-8x7b-instruct) [M(](https://modelslab.com/models/mistral_ai/mistralai-Mistral-7B-Instruct-v0.3)[ModelsLab](https://modelslab.com/models/mistral_ai) [Mistral (7B) Instruct v0.3 Closed Source Model](https://modelslab.com/models/mistral_ai/mistralai-Mistral-7B-Instruct-v0.3) [DR](https://modelslab.com/models/open_router/deepseek-deepseek-r1-distill-qwen-32b)[Open Router](https://modelslab.com/models/open_router) [DeepSeek: R1 Distill Qwen 32B Closed Source Model](https://modelslab.com/models/open_router/deepseek-deepseek-r1-distill-qwen-32b) [![Gemini 2.5 Flash](https://images.stablediffusionapi.com/?Image=https://assets.modelslab.ai/generations/4fc6b09e-c7ae-4301-aed1-0b180b88157b.png)](https://modelslab.com/models/google/gemini-2.5-flash)[Google](https://modelslab.com/models/google) [Gemini 2.5 Flash Closed Source Model](https://modelslab.com/models/google/gemini-2.5-flash) [Q1](https://modelslab.com/models/together_ai/Qwen-Qwen2.5-1.5B)[Together AI](https://modelslab.com/models/together_ai) [Qwen2.5 1.5B Closed Source Model](https://modelslab.com/models/together_ai/Qwen-Qwen2.5-1.5B) [OG](https://modelslab.com/models/open_router/openai-gpt-5.1-chat)[Open Router](https://modelslab.com/models/open_router) [OpenAI: GPT-5.1 Chat Closed Source Model](https://modelslab.com/models/open_router/openai-gpt-5.1-chat) [NH](https://modelslab.com/models/open_router/nousresearch-hermes-3-llama-3.1-70b)[Open Router](https://modelslab.com/models/open_router) [Nous: Hermes 3 70B Instruct Closed Source Model](https://modelslab.com/models/open_router/nousresearch-hermes-3-llama-3.1-70b) [GG](https://modelslab.com/models/open_router/google-gemma-4-31b-it-free)[Open Router](https://modelslab.com/models/open_router) [Google: Gemma 4 31B (free) Closed Source Model](https://modelslab.com/models/open_router/google-gemma-4-31b-it-free) [AN](https://modelslab.com/models/open_router/amazon-nova-micro-v1)[Open Router](https://modelslab.com/models/open_router) [Amazon: Nova Micro 1.0 Closed Source Model](https://modelslab.com/models/open_router/amazon-nova-micro-v1) [OO](https://modelslab.com/models/open_router/openai-o3-mini)[Open Router](https://modelslab.com/models/open_router) [OpenAI: o3 Mini Closed Source Model](https://modelslab.com/models/open_router/openai-o3-mini) [OG](https://modelslab.com/models/open_router/openai-gpt-4-turbo)[Open Router](https://modelslab.com/models/open_router) [OpenAI: GPT-4 Turbo Closed Source Model](https://modelslab.com/models/open_router/openai-gpt-4-turbo) [![GPT 5.1](https://images.stablediffusionapi.com/?Image=https://assets.modelslab.ai/generations/fad83520-47a8-4059-b4b9-b32adf4d0be7.png)](https://modelslab.com/models/openai/gpt5.1)[Open Ai](https://modelslab.com/models/openai) [GPT 5.1 Closed Source Model](https://modelslab.com/models/openai/gpt5.1) [OO](https://modelslab.com/models/open_router/openai-o3-mini-high)[Open Router](https://modelslab.com/models/open_router) [OpenAI: o3 Mini High Closed Source Model](https://modelslab.com/models/open_router/openai-o3-mini-high) [OG](https://modelslab.com/models/open_router/openai-gpt-4.1-mini)[Open Router](https://modelslab.com/models/open_router) [OpenAI: GPT-4.1 Mini Closed Source Model](https://modelslab.com/models/open_router/openai-gpt-4.1-mini) [XG](https://modelslab.com/models/open_router/x-ai-grok-3-beta)[Open Router](https://modelslab.com/models/open_router) [xAI: Grok 3 Beta Closed Source Model](https://modelslab.com/models/open_router/x-ai-grok-3-beta) [ZG](https://modelslab.com/models/open_router/z-ai-glm-5.1)[Open Router](https://modelslab.com/models/open_router) [Z.ai: GLM 5.1 Closed Source Model](https://modelslab.com/models/open_router/z-ai-glm-5.1) About Qwen3 4B Instruct 2507 --- Qwen3 4B Instruct 2507 is a text generation AI model by Qwen available on ModelsLab. Access Qwen3 4B Instruct 2507 through our API with pay-per-use pricing and no minimum commitments. ### Technical Specifications Model IDQwen-Qwen3-4B-Instruct-2507CategoryLLM ModelsTaskText GenerationAddedApril 4, 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 Qwen3 4B Instruct 2507 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": "Qwen-Qwen3-4B-Instruct-2507", "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/Qwen/Qwen-Qwen3-4B-Instruct-2507/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 Qwen](https://modelslab.com/models/open_router) [View Pricing](https://modelslab.com/pricing) Qwen3 4B Instruct 2507 FAQ --- ### What is Qwen3 4B Instruct 2507? Qwen3 4B Instruct 2507 is a text generation AI model by Qwen available on ModelsLab. Access it through our API with pay-per-use pricing and no minimum commitments. ### How do I use the Qwen3 4B Instruct 2507 API? You can integrate Qwen3 4B Instruct 2507 into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "Qwen-Qwen3-4B-Instruct-2507" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### What is the Qwen3 4B Instruct 2507 model ID? The model ID for Qwen3 4B Instruct 2507 is "Qwen-Qwen3-4B-Instruct-2507". Use this ID in your API requests to specify this model. ### Does Qwen3 4B Instruct 2507 have a free tier? Yes, ModelsLab offers a free tier that lets you try Qwen3 4B Instruct 2507 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 - 2026-04-15*