Frontier coding models
free for the best
We're recruiting the best engineers and giving them the latest premium coding models for free. Your usage will help evaluate and improve the performance of frontier coding models.
Start using it in Claude Code in seconds
Install Bonsai CLI and start Claude Code with one command
bonsai login
bonsai start claude
That's it. Your prompts will be routed to a leading coding model for free.
Frontier coding models, free.
Access leading AI coding models at no cost. All models run in stealth mode.
GPT-5
Excels at writing, research, analysis, coding, and problem-solving
Claude
Strong reasoning, coding, long-context, multimodal understanding for complex tasks
Grok
A speedy and economical reasoning model that excels at agentic coding
Gemini
Thinking models that deliver enhanced performance and improved accuracy
Qwen
Optimized for agentic coding tasks such as tool use, and long-context reasoning
GLM
Foundation models optimized for agentic tasks
Sign Up
Create a free account and get your API key from the dashboard. No credit card required.
Setup
Install the Bonsai CLI and run bonsai start claude to get started.
Start Coding
Your prompts will be routed to a leading coding model for free.
Shape the future of AI coding
We use anonymized user data to evaluate and help improve the performance of frontier coding models.
We provide free access to premium frontier coding models like Claude, GPT-5, and more.
Prompts and completions are collected and fully anonymized before being used for evaluation and training.
All data encrypted with AES-256 at rest and TLS 1.2+ in transit
Frequently asked questions
Start using frontier models for free
Get free access to the latest coding models. Help shape the future of AI coding assistants.