Overview
Biela.dev integrates multiple Large Language Models (LLMs) — advanced AI systems trained on vast datasets to understand, reason, and generate human-like text and code.
Each model has its own strengths, designed for different workflows: from fast prototyping to premium, production-grade builds.
When you start a session in Plan Mode or Build Mode, you can select which model to use.
Choosing the right LLM allows you to balance speed, creativity, and depth of reasoning — depending on your project goals.
Claude 4 Sonnet
Most powerful AI for premium results.
Claude 4 Sonnet is designed for precision, reasoning, and long-context understanding. It excels in technical writing, architectural planning, and advanced code generation where accuracy and structure matter most.
Best for:
- Complex feature development
- API design and documentation
- Multi-step reasoning and logic-heavy workflows
- Long-form content generation
Advantages:
- Industry-leading reasoning and consistency
- Excellent at interpreting mixed instructions (code + text + visuals)
- Highly reliable for production-level builds
GLM 4.5
High-performance AI with strong capabilities.
GLM 4.5 is a fast, efficient model built for developers who want both power and speed.
It handles logic, structure, and prompt execution with high responsiveness — ideal for daily use and mid-sized projects.
Best for:
- Iterative code edits and refactoring
- Quick prototyping
- Testing and performance-driven tasks
Advantages:
- Fast and stable across large files
- Strong reasoning for code transformation
- Balanced between quality and runtime efficiency
Gemini 2.5 Pro
Versatile AI with wide context.
Gemini 2.5 Pro delivers adaptability and a deep contextual window, making it ideal for users who work on multi-file or complex cross-component projects.
It combines creative reasoning with robust technical understanding.
Best for:
- Full-application generation
- Cross-component coordination (frontend + backend)
- Content-rich projects
Advantages:
- Handles extended context windows with ease
- Produces coherent, maintainable output
- Strong hybrid use (design + code + text)
Gemini 2.5 Flash
Faster, cost-effective option.
Gemini 2.5 Flash is optimized for speed and efficiency — perfect for smaller edits, UI tweaks, or bulk testing where turnaround time matters.
Best for:
- Rapid prototyping
- Visual edits and small logic updates
- Cost-sensitive tasks and batch operations
Advantages:
- Lightning-fast responses
- Minimal token consumption
- Ideal for iterative front-end workflows
Choosing the Right Model
| Model | Strength | Ideal Use Case |
|---|---|---|
| Claude 4 Sonnet | Deep reasoning and premium quality | Enterprise projects, technical documentation |
| GLM 4.5 | Performance and balance | Refactoring and iterative development |
| Gemini 2.5 Pro | Broad context and creative logic | Full app generation |
| Gemini 2.5 Flash | Speed and efficiency | Quick edits and visual prototyping |
Tip
You can switch models anytime between sessions. Biela automatically saves your last choice and adjusts prompts based on context.