Our model. Your advantage. Mulu 1.5 delivers top-tier code quality that rivals the most expensive models on the market -- at a fraction of the price. Plus, switch to Claude, GPT, or Gemini anytime.
We built our own models because we believe the best AI coding experience shouldn't cost a fortune. Mulu 1.5 matches the top performers -- and Mulu 1.5 Lite handles quick tasks for almost nothing.
Our flagship model for serious coding. Handles complex multi-file projects, understands architectural patterns, and generates production-ready code that actually works.
Blazing fast for quick iterations. Perfect for simple fixes, questions, and rapid prototyping. Responds almost instantly so you never lose your flow.
Our models are purpose-built for coding tasks. We've optimized every layer for the kind of work Mulu users actually do.
Mulu models natively support tool calling -- file edits, terminal commands, and search happen seamlessly in the agent loop.
From hobby projects to production apps. Use Lite for quick tasks and the flagship for complex builds -- pay only for what you need.
We benchmark Mulu against the top models so you don't have to wonder. Here's how our flagship model compares on real coding tasks.
Select "Mulu" and our router analyzes each subtask in real time, then picks the optimal model. Simple question? Lite handles it instantly. Complex refactor? The flagship takes over. You get the best output without thinking about it.
Our routing engine analyzes your prompt in real time -- looking at task complexity, code generation requirements, and context length to pick the optimal model for each step.
Every AI model has different strengths. Some are fast, some are cheap, some are brilliant at reasoning. Mulu gives you all of them so you always have the right tool.
Quick questions don't need a heavyweight model. Use fast models for iteration and premium models for the final build. You control the balance.
Claude excels at nuanced reasoning. GPT is great for broad knowledge. Gemini handles massive contexts. Mulu optimizes for code. Use each where it shines.
If one provider has an outage or changes pricing, you switch to another in one click. Your projects aren't dependent on any single AI company.
Start with one model and switch to another without losing context. Your full conversation history carries over seamlessly -- just click and keep going.
Not sure which model is best? Run your prompt on two or more models side by side and compare the results before choosing one to apply.
From ultra-cheap quick tasks to maximum-quality flagship builds, we have a model for every scenario. Switch between them anytime.
Everything you need to know to pick the right model for your use case. All models support tool calling and streaming.
| Model | Context | Max Output | Input / 1M | Output / 1M | Thinking | Best For |
|---|---|---|---|---|---|---|
| Mulu 1.5 | 200K | 65K | $0.75 | $2.55 | -- | Complex coding, multi-file projects |
| Mulu 1.5 Lite | 256K | 256K | $0.10 | $0.30 | -- | Quick fixes, rapid iteration |
| Mulu Beast | 128K | 65K | $0.04 | $0.19 | -- | Ultra-cheap simple tasks |
| Claude Sonnet 4.6 | 1M | 8K | $3.00 | $15.00 | Extended | Nuanced code review, reasoning |
| Claude Opus 4.6 | 1M | 8K | $5.00 | $25.00 | Extended | Large codebase analysis, top quality |
| Claude Haiku 4.5 | 200K | 8K | $1.00 | $5.00 | Extended | Fast and affordable, quick tasks |
| GPT-5.3 Codex | 400K | 128K | $1.75 | $14.00 | Adjustable | Code generation, 25% faster |
| GPT-5.4 | 400K | 128K | $1.75 | $14.00 | Adjustable | General-purpose, broad knowledge |
| GPT-5.4 Pro | 400K | 128K | $21.00 | $168.00 | Deep | Maximum reasoning, hard problems |
| Gemini 3 Flash | 1M | 65K | $0.50 | $3.00 | -- | Large contexts, fast response |
| Gemini 3.1 Pro | 1M | 65K | $2.00 | $12.00 | Deep Think | Large contexts, flagship quality |
| MiniMax M2.5 | 200K | 65K | $0.30 | $1.10 | -- | Ultra-cheap coding tasks |
| Kimi K2.5 | 256K | 65K | $0.45 | $2.20 | -- | Strong coding, great value |
| Qwen 3.5 Plus | 1M | 65K | $0.40 | $2.40 | Adjustable | Large contexts, excellent value |
Mulu shows you estimated costs before you send each message. You see exactly which model is being used and what it costs. Set spending limits per model to stay in control.
Our models are designed specifically for the kind of coding work you do in Mulu. Here's why most users stick with them as their default.
Mulu 1.5 scores 77.8% on SWE-bench Verified -- matching models that cost 4-20x more per token. You get the same code quality for a fraction of the cost.
Unlike general-purpose models, Mulu is optimized for the coding workflow -- tool calling, file edits, terminal commands, and multi-step agent loops. It's not trying to write poetry.
If you ever want a different perspective, Claude, GPT, and Gemini are one click away. You're never locked in. Use Mulu as default, switch when you want.
16 models across 6 providers. Mulu, Claude, GPT, Gemini, and more. Get the best AI for every coding task.