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About Meta: Llama 3.1 405B Instruct
The highly anticipated 400B class of Llama3 is here! Clocking in at 128k context with impressive eval scores, the Meta AI team continues to push the frontier of open-source LLMs. Meta's latest class of model (Llama 3.1) launched with a variety of sizes & flavors. This 405B instruct-tuned version is optimized for high quality dialogue usecases. It has demonstrated strong performance compared to leading closed-source models including GPT-4o and Claude 3.5 Sonnet in evaluations. To read more abo
Technical Specifications
- Model ID
- meta-llama-llama-3.1-405b-instruct
- Category
- LLM Models
- Task
- Text Generation
- Price
- $4.000000 per API call
- 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 Meta: Llama 3.1 405B Instruct 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": "meta-llama-llama-3.1-405b-instruct","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 for SDKs, code examples in Python, JavaScript, and more.
Pricing
Meta: Llama 3.1 405B Instruct API costs $4.000000 per API call. 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
Meta: Llama 3.1 405B Instruct FAQ
The highly anticipated 400B class of Llama3 is here! Clocking in at 128k context with impressive eval scores, the Meta AI team continues to push the frontier of open-source LLMs. Meta's latest class of model (Llama 3.1) launched with a variety of sizes & flavors. This 405B instruct-tuned version is
You can integrate Meta: Llama 3.1 405B Instruct into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "meta-llama-llama-3.1-405b-instruct" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation.
Meta: Llama 3.1 405B Instruct costs $4.000000 per API call. ModelsLab uses pay-per-use pricing with no minimum commitments. A free tier is available to get started.
The model ID for Meta: Llama 3.1 405B Instruct is "meta-llama-llama-3.1-405b-instruct". Use this ID in your API requests to specify this model.
Yes, ModelsLab offers a free tier that lets you try Meta: Llama 3.1 405B Instruct and other AI models. Sign up to get free API credits and start building immediately.