Selecting AI model

Last updated: April 20, 2026

AI Models Powering ChatLab

ChatLab utilizes some of the most advanced AI models available today to provide a superior chatbot experience. These models include various versions of OpenAI's GPT, Google's Gemini, and Anthropic's Claude. Each model offers unique strengths tailored to different needs and budgets.

Choosing Your AI Model

From the main ChatLab administration page, go to Chatbots, click on selected chatbot, select the Settings tab, then click Model & Advanced in the sidebar. Here you can select between various OpenAI, Google Gemini, and Anthropic Claude AI models from the Model dropdown.

Model selection in Advanced Settings

Model selection is available on Standard and Premium plans. Free and Basic plan users use the default model.

OpenAI Models

  • GPT 5.5 (10 credits per message): OpenAI's top-tier reasoning model. Best for highly demanding tasks - complex problem solving, advanced analysis, and tasks where accuracy matters more than speed or cost.

  • GPT 5.4 (5 credits per message): A strong reasoning model balancing quality and price. Good fit for most production chatbots that need solid contextual understanding without paying the Premium tier rate.

  • GPT 5.4-mini (3 credits per message): A reasoning-optimized mini model. Stronger at multi-step questions than standard Mini models, while costing less than full models. Useful sweet spot when 1-credit Mini quality is not enough.

  • GPT 5.1 (5 credits per message): A capable OpenAI model with superior reasoning and accuracy. Good choice for complex tasks requiring deep understanding.

  • GPT 5 (5 credits per message): A powerful model with excellent performance across a wide range of tasks. Great for e-commerce integrations and backend systems.

  • GPT 5 Mini (1 credit per message): A fast and cost-efficient version of GPT-5. Default choice for new bots, offering a strong balance between quality and cost.

  • GPT 4.1 (5 credits per message): An advanced model with enhanced accuracy and reasoning. Well-suited for tasks needing deeper understanding and reliability.

  • GPT 4.1 Mini (1 credit per message): A lightweight, faster version of GPT-4.1, providing a solid balance between speed and intelligence for everyday tasks.

  • GPT 4o (5 credits per message): OpenAI's multimodal model offering top-tier performance at a competitive cost. Note: does not support dynamic suggested questions or products view features.

  • GPT 4o Mini (1 credit per message): Fast and affordable OpenAI model, perfect for general-purpose interactions. Note: does not support dynamic suggested questions or products view features.

Google Gemini Models

  • Gemini 3 Pro (10 credits per message): Google's most intelligent model with breakthrough reasoning capabilities. Tops the LMArena Leaderboard and excels at complex problem-solving, multimodal understanding (text, images, audio, video, PDFs), and coding tasks. Features a 1M token context window.

  • Gemini 3 Flash (3 credits per message): Google's latest fast model from the Gemini 3 family. Offers significantly improved reasoning and quality over Gemini 2.5 Flash while maintaining high speed.

  • Gemini 2.5 Pro (10 credits per message): A powerful alternative to GPT models, performs well in coding and structured data tasks.

  • Gemini 2.5 Flash (1 credit per message): Google's fast and efficient model, engineered for a superior balance of speed, efficiency, and strong performance.

Anthropic Claude Models

  • Claude Opus 4.7 (15 credits per message): Anthropic's most capable model, designed for complex reasoning, long-form analysis, and nuanced multi-step tasks. Best when answer quality matters more than cost or speed.

  • Claude Sonnet 4.6 (10 credits per message): Anthropic's flagship balanced model. Strong reasoning and writing quality at a mid-tier price. Good fit for production chatbots that need consistently high answer quality across diverse questions.

  • Claude Haiku 4.5 (5 credits per message): Anthropic's fast and cost-efficient model. Solid quality at a price comparable to OpenAI's Full models, with Anthropic's signature writing style. Good alternative when you want a non-OpenAI, non-Google option.

Note: Gemini models and GPT-4o models do not support dynamic suggested questions and products view features. If you have these features enabled and switch to an incompatible model, they will be automatically disabled.

Which Model Should I Choose?

  • Best value for most use cases: GPT 5 Mini (1 credit) - fast, affordable, default for new bots
  • Best quality (OpenAI): GPT 5.5 (10 credits) - top-tier reasoning, or GPT 5.4 / 5.1 (5 credits) for a balance of quality and cost
  • Best quality (Google): Gemini 3 Pro (10 credits) - top-tier reasoning and multimodal understanding
  • Best quality (Anthropic): Claude Opus 4.7 (15 credits) - complex reasoning, long-form analysis, nuanced multi-step tasks
  • Reasoning sweet spot: GPT 5.4-mini or Gemini 3 Flash (3 credits) - reasoning-optimized, better than 1-credit Minis on multi-step questions
  • Alternative provider (Anthropic): Claude Sonnet 4.6 (10 credits) - flagship balanced quality, or Claude Haiku 4.5 (5 credits) - fast and cost-efficient
  • Budget-friendly with Google AI: Gemini 2.5 Flash (1 credit) - fast and efficient for everyday conversational tasks
  • E-commerce and integrations: GPT 5.4, GPT 5, or GPT 4.1 (5 credits) - reliable for API functions and product data