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Models

Biel.ai offers a range of AI models designed to enhance user interactions with your documentation site. These models provide different levels of performance, speed, and sophistication, enabling you to select the best fit for your needs.

Available models​

Biel.ai supports the following models:

GPT models​

  • GPT-4o Mini (default): Optimized for speed and efficiency.
  • GPT-4: Advanced capabilities for detailed and complex queries.
  • GPT-4.1-nano: Lightweight version optimized for maximum speed and efficiency.
  • GPT-4.1-mini: Enhanced version optimized for speed and efficiency.
  • GPT-4.1: Advanced model with enhanced capabilities for detailed and complex queries.
  • GPT-5: OpenAI's most advanced model with unified reasoning capabilities, enhanced multimodal support, and superior performance across coding, math, and complex analysis tasks.

Claude models​

  • Claude 3.5 Haiku: Fast and effective for general documentation.
  • Claude 3.5 Sonnet: Designed for nuanced, context-rich answers.
  • Claude 3.7 Sonnet: Advanced model designed for nuanced, context-rich answers.
  • Claude Sonnet 4.0: Anthropic's most advanced model with high-performance reasoning capabilities, optimized for complex problem-solving and extended thinking tasks.

Model selection guide​

Models are categorized based on their primary characteristics:

Fast models​

  • GPT-4o mini
  • GPT-4.1-nano
  • GPT-4.1 mini
  • Claude 3.5 Haiku

Best for:

  • Real-time responsiveness
  • Straightforward or moderately complex content
  • High-traffic sites
  • All subscription plans

Advanced models​

  • GPT-4
  • GPT-4.1
  • GPT-5
  • Claude 3.5/3.7 Sonnet
  • Claude Sonnet 4.0

Best for:

  • Highly technical content
  • Specialized or detailed queries
  • Sites with focused, high-value interactions
  • Business or higher subscription plans

Model family comparison​

GPT models​

  • Excel in structured reasoning and systematic problem-solving
  • Outstanding performance in coding, mathematics, and technical analysis
  • Excellent for factual responses and step-by-step explanations
  • GPT-5 introduces unified reasoning with adaptive processing power

Claude models​

  • Known for natural, human-like conversational tone
  • Superior at contextual understanding and nuanced communication
  • Excellent for creative writing and empathetic responses
  • Strong in handling long-form content and extended conversations

Changing the model​

important

Only users with the Administrator or Maintainer role can manage projects. For more details, see Manage roles.

Follow these steps to change the AI model used in your Biel.ai project:

  1. Log in to your Biel.ai account and navigate to your dashboard.
  2. Select your project from the list of available projects.
  3. Click Settings.
  4. Find LLM settings.
  5. Under the Select model, choose the AI model you want to use from the dropdown menu.
  6. Click Save to apply the changes.

Your chatbot will now use the selected model to respond to user queries.

Data Privacy​

Biel.ai prioritizes your data privacy. By default, your chatbot interactions are opted out of training programs, ensuring that your data is not used to train or improve third-party AI models. This guarantees the confidentiality of your documentation and user interactions.