Open Source Alternatives
Similar models we host ourselves — unlimited on the $149/month Open Source Unlimited plan, where this model is billed per call from your wallet
Looking for something different?
Models that trade off differently against the one you are viewing
Better quality
Newer flagship models that generally produce stronger results.
Lower cost per run
Open-source models we host, unlimited on the $149/month plan.
Related Models
Discover similar models you might be interested in
About OpenAI: Gpt-Oss-120b
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...
Technical Specifications
- Model ID
- openai-gpt-oss-120b
- Category
- LLM Models
- Task
- Text Generation
- Price
- $0.1035 per million tokens
- Added
- February 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-Oss-120b into your application with a single API call. Get your API key from the pricing page to get started.
import requestsimport jsonurl = "https://modelslab.com/api/v7/llm/chat/completions"headers = {"Content-Type": "application/json"}data = {"model_id": "openai-gpt-oss-120b","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}")
Pricing
OpenAI: Gpt-Oss-120b API costs $0.103500 per million tokens. Pay only for what you use with no minimum commitments. View pricing plans
Use Cases
- AI chatbots and virtual assistants
- Code generation and developer tools
- Content writing and copywriting automation
- Data analysis, summarization, and extraction
OpenAI: Gpt-Oss-120b FAQ
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...
You can integrate OpenAI: Gpt-Oss-120b into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "openai-gpt-oss-120b" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation.
OpenAI: Gpt-Oss-120b costs $0.103500 per million tokens. ModelsLab plans start at $21/month (Basic), and the $149/month Open Source plan includes unlimited generation on open-source models.
The model ID for OpenAI: Gpt-Oss-120b is "openai-gpt-oss-120b". Use this ID in your API requests to specify this model.
Yes. ModelsLab is subscription-based with no free tier — plans start at $21/month (Basic, 3,250 API calls). The $149/month Open Source Unlimited plan includes unlimited generation across open-source models; premium third-party models are billed per call from your wallet.