ModelFusion is a comprehensive suite of free tools for working with large language models (LLMs). It is designed for AI developers and researchers who need to compare costs, optimize prompts, and evaluate model performance without spending money or dealing with complex setups. The toolkit covers a wide range of use cases, from simple cost estimation to running models locally.
Key Features
- LLM Cost Calculator: Estimate API expenses for GPT-4, Claude, Gemini, and 25+ other models. Compare pricing across providers to find the most cost-effective option.
- Prompt Library: Access over 200 proven prompts for coding, SEO, business, and creative tasks, optimized for 2025 AI models.
- Prompt Tokenizer: Count tokens and optimize prompt length to reduce costs and improve efficiency.
- Model Selector: Interactive quiz to find the best AI model based on your specific needs and budget.
- Observability Tools: Monitor and debug LLM applications with the best observability tools of 2025.
- Local LLM Runner Guide: Step-by-step instructions for running open-source models like LLaMA 3.1 and Mistral on your own hardware using Ollama or LM Studio.
- Open Source LLM Directory: Discover 30+ free models with licensing and performance details.
- LLM Glossary and Prompt Engineering Tips: Educational resources to improve your AI skills.
All tools are updated regularly to reflect the latest model releases and pricing, and no registration is required.
Key Benefits
- Wide range of free LLM tools
- Supports 25+ AI models with current pricing
- No registration required
- Regularly updated for 2025