--- title: OpenAI: GPT 4.1 Nano API | Text Generation | ModelsLab description: Build with OpenAI: GPT 4.1 Nano API by Openai. Text generation, chat, code, and reasoning. Pay-per-use. Free tier. url: https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/openai/openai-gpt-4.1-nano/api.md canonical: https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/openai/openai-gpt-4.1-nano/api.md type: product component: Playground/LLM/Index generated_at: 2026-05-13T10:53:23.483845Z --- OpenAI: GPT-4.1 Nano --- [LLMs.txt](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-4.1-nano/llms.txt) [.md](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/openai/openai-gpt-4.1-nano.md) openai-gpt-4.1-nano openai Closed Source Model $0.250000 / call OpenAI: GPT-4.1 Nano --- 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 ### OpenAI: GPT-4.1 Nano openai openai-gpt-4.1-nano Copy model ID PricingInput $0.10 / 1M tokens Output $0.40 / 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-frontend-v2-927501783998.us-east4.run.app/models?feature=llmaster) [OG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-3.5-turbo-16k)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [OpenAI: GPT-3.5 Turbo 16k Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-3.5-turbo-16k) [OG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-5-pro)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [OpenAI: GPT-5 Pro Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-5-pro) [OG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-4-turbo-preview)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [OpenAI: GPT-4 Turbo Preview Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-4-turbo-preview) [GG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/google-gemini-2.5-flash-lite)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Google: Gemini 2.5 Flash Lite Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/google-gemini-2.5-flash-lite) [MM](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/mistralai-mistral-nemo)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Mistral: Mistral Nemo Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/mistralai-mistral-nemo) [ML](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/meta-llama-llama-3-70b-instruct)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Meta: Llama 3 70B Instruct Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/meta-llama-llama-3-70b-instruct) [CV](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/deepcogito-cogito-v1-preview-llama-70B)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [Cogito V1 Preview Llama 70B Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/deepcogito-cogito-v1-preview-llama-70B) [FC](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/facebook-cwm)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [Facebook CWM Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/facebook-cwm) [MS](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/mistralai-Magistral-Small-2506)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [Magistral Small 2506 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/mistralai-Magistral-Small-2506) [OG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-4o-mini)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [OpenAI: GPT-4o-mini Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-4o-mini) [LL](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/liquid-lfm-2-24b-a2b)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [LiquidAI: LFM2-24B-A2B Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/liquid-lfm-2-24b-a2b) [MM](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/mistralai-ministral-3b-2512)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Mistral: Ministral 3 3B 2512 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/mistralai-ministral-3b-2512) [MM](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/minimax-minimax-m2.1)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [MiniMax: MiniMax M2.1 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/minimax-minimax-m2.1) [DR](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/deepseek/deepseek-ai-DeepSeek-R1-Distill-Qwen-1.5B)[ModelsLab](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/deepseek) [DeepSeek R1 Distill Qwen 1.5B Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/deepseek/deepseek-ai-DeepSeek-R1-Distill-Qwen-1.5B) [DR](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/deepseek-ai-DeepSeek-R1)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [DeepSeek R1-0528 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/deepseek-ai-DeepSeek-R1) [AC](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/anthropic-claude-3.5-haiku)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Anthropic: Claude 3.5 Haiku Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/anthropic-claude-3.5-haiku) [QQ](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/qwen-qwen3.5-35b-a3b)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Qwen: Qwen3.5-35B-A3B Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/qwen-qwen3.5-35b-a3b) [TU](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/thedrummer-unslopnemo-12b)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [TheDrummer: UnslopNemo 12B Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/thedrummer-unslopnemo-12b) About OpenAI: GPT-4.1 Nano --- For tasks that demand low latency, GPT‑4.1 nano is the fastest and cheapest model in the GPT-4.1 series. It delivers exceptional performance at a small size with its 1 million... ### Technical Specifications Model IDopenai-gpt-4.1-nanoCategoryLLM ModelsTaskText GenerationPrice$0.250000 per million tokensAddedFebruary 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 OpenAI: GPT-4.1 Nano into your application with a single API call. Get your API key from the [pricing page](https://modelslab-frontend-v2-927501783998.us-east4.run.app/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": "openai-gpt-4.1-nano", "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-frontend-v2-927501783998.us-east4.run.app/models/openai/openai-gpt-4.1-nano/api) for SDKs, code examples in Python, JavaScript, and more. ### Pricing OpenAI: GPT-4.1 Nano API costs $0.250000 per million tokens. Pay only for what you use with no minimum commitments. [View pricing plans](https://modelslab-frontend-v2-927501783998.us-east4.run.app/pricing) ### 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-frontend-v2-927501783998.us-east4.run.app/models?feature=llmaster) [More from Openai](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [View Pricing](https://modelslab-frontend-v2-927501783998.us-east4.run.app/pricing) OpenAI: GPT-4.1 Nano FAQ --- ### What is OpenAI: GPT-4.1 Nano? For tasks that demand low latency, GPT‑4.1 nano is the fastest and cheapest model in the GPT-4.1 series. It delivers exceptional performance at a small size with its 1 million... ### How do I use the OpenAI: GPT-4.1 Nano API? You can integrate OpenAI: GPT-4.1 Nano into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "openai-gpt-4.1-nano" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### How much does OpenAI: GPT-4.1 Nano cost? OpenAI: GPT-4.1 Nano costs $0.250000 per million tokens. ModelsLab uses pay-per-use pricing with no minimum commitments. A free tier is available to get started. ### What is the OpenAI: GPT-4.1 Nano model ID? The model ID for OpenAI: GPT-4.1 Nano is "openai-gpt-4.1-nano". Use this ID in your API requests to specify this model. ### Does OpenAI: GPT-4.1 Nano have a free tier? Yes, ModelsLab offers a free tier that lets you try OpenAI: GPT-4.1 Nano 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 - 2026-05-13*