--- title: OpenAI: GPT 3.5 Turbo 16k API | Text Generation | ModelsLab description: Build with OpenAI: GPT 3.5 Turbo 16k 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-3.5-turbo-16k/api.md canonical: https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/openai/openai-gpt-3.5-turbo-16k/api.md type: product component: Playground/LLM/Index generated_at: 2026-05-13T10:37:58.662509Z --- OpenAI: GPT-3.5 Turbo 16k --- [LLMs.txt](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-3.5-turbo-16k/llms.txt) [.md](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/openai/openai-gpt-3.5-turbo-16k.md) openai-gpt-3.5-turbo-16k openai Closed Source Model $3.500000 / call OpenAI: GPT-3.5 Turbo 16k --- 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-3.5 Turbo 16k openai openai-gpt-3.5-turbo-16k Copy model ID PricingInput $3.00 / 1M tokens Output $4.00 / 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-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-0613)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [OpenAI: GPT-3.5 Turbo (older v0613) Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-3.5-turbo-0613) [MM](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/mistralai-mistral-medium-3)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Mistral: Mistral Medium 3 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/mistralai-mistral-medium-3) [M(](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/mistral_ai/mistralai-Mistral-7B-Instruct-v0.3)[ModelsLab](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/mistral_ai) [Mistral (7B) Instruct v0.3 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/mistral_ai/mistralai-Mistral-7B-Instruct-v0.3) [NN](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/nvidia-nemotron-3-nano-omni-30b-a3b-reasoning-free)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [NVIDIA: Nemotron 3 Nano Omni (free) Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/nvidia-nemotron-3-nano-omni-30b-a3b-reasoning-free) [OG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-4o-mini-search-preview)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [OpenAI: GPT-4o-mini Search Preview Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/openai-gpt-4o-mini-search-preview) [QQ](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/qwen-qwen3-next-80b-a3b-instruct-free)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Qwen: Qwen3 Next 80B A3B Instruct (free) Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/qwen-qwen3-next-80b-a3b-instruct-free) [RL](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/refuel_ai/togethercomputer-Refuel-Llm-V2)[ModelsLab](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/refuel_ai) [Refuel LLM V2 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/refuel_ai/togethercomputer-Refuel-Llm-V2) [G4](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/zai-org-GLM-4.5-Air-FP8)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [Glm 4.5 Air Fp8 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/zai-org-GLM-4.5-Air-FP8) [Q2](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/qwen/Qwen-Qwen2.5-Coder-32B-Instruct)[ModelsLab](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/qwen) [Qwen 2.5 Coder 32B Instruct Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/qwen/Qwen-Qwen2.5-Coder-32B-Instruct) [LG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/meta-llama-llama-guard-3-8b)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Llama Guard 3 8B Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/meta-llama-llama-guard-3-8b) [TC](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/thedrummer-cydonia-24b-v4.1)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [TheDrummer: Cydonia 24B V4.1 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/thedrummer-cydonia-24b-v4.1) [BE](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/baidu-ernie-4.5-21b-a3b-thinking)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Baidu: ERNIE 4.5 21B A3B Thinking Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/baidu-ernie-4.5-21b-a3b-thinking) [XG](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/x-ai-grok-3)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [xAI: Grok 3 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/x-ai-grok-3) [![Anthropic: Claude Opus 4.7 (Fast)](https://images.stablediffusionapi.com/?Image=https://assets.modelslab.ai/generations/24ffcfaf-8ebc-43cb-97ff-2e8445e214e1.jpg)](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/anthropic-claude-opus-4.7-fast)[Open Router](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router) [Anthropic: Claude Opus 4.7 (Fast) Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/open_router/anthropic-claude-opus-4.7-fast) [G4](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/zai-org-GLM-4.7)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [GLM 4.7 Fp8 Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/zai-org-GLM-4.7) [G3](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/google-gemma-3-270m-it-lora)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [Gemma 3 270M It Lora Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/google-gemma-3-270m-it-lora) [G4](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/zai-org-GLM-4.5V)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [GLM 4.5V Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/zai-org-GLM-4.5V) [G3](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/google-gemma-3-27b-pt)[Together AI](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai) [Gemma 3 27B Pt Closed Source Model](https://modelslab-frontend-v2-927501783998.us-east4.run.app/models/together_ai/google-gemma-3-27b-pt) About OpenAI: GPT-3.5 Turbo 16k --- This model offers four times the context length of gpt-3.5-turbo, allowing it to support approximately 20 pages of text in a single request at a higher cost. Training data: up... ### Technical Specifications Model IDopenai-gpt-3.5-turbo-16kCategoryLLM ModelsTaskText GenerationPrice$3.500000 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-3.5 Turbo 16k 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-3.5-turbo-16k", "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-3.5-turbo-16k/api) for SDKs, code examples in Python, JavaScript, and more. ### Pricing OpenAI: GPT-3.5 Turbo 16k API costs $3.500000 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 [Learn more about OpenAI: GPT-3.5 Turbo 16k](https://modelslab-frontend-v2-927501783998.us-east4.run.app/openai-gpt-35-turbo-16k) [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-3.5 Turbo 16k FAQ --- ### What is OpenAI: GPT-3.5 Turbo 16k? This model offers four times the context length of gpt-3.5-turbo, allowing it to support approximately 20 pages of text in a single request at a higher cost. Training data: up... ### How do I use the OpenAI: GPT-3.5 Turbo 16k API? You can integrate OpenAI: GPT-3.5 Turbo 16k into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "openai-gpt-3.5-turbo-16k" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### How much does OpenAI: GPT-3.5 Turbo 16k cost? OpenAI: GPT-3.5 Turbo 16k costs $3.500000 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-3.5 Turbo 16k model ID? The model ID for OpenAI: GPT-3.5 Turbo 16k is "openai-gpt-3.5-turbo-16k". Use this ID in your API requests to specify this model. ### Does OpenAI: GPT-3.5 Turbo 16k have a free tier? Yes, ModelsLab offers a free tier that lets you try OpenAI: GPT-3.5 Turbo 16k 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*