What is Stratus X1?
STRATUS X1 is a predictive world model that enables AI agents to reason and plan before acting. Unlike traditional LLMs that generate actions token-by-token, Stratus gives agents the ability to:Observe
Encode current state into embedding space
Predict
Simulate multiple possible futures
Act
Choose the path most likely to succeed
Quick Start
Get started with Stratus in minutes.Quickstart Guide
Get your API key and make your first request in under 5 minutes.
Key Features
OpenAI-Compatible API
Drop-in replacement for OpenAI’s API. Change one line of code and get world model prediction.
Multi-Step Rollout
Predict complete action sequences and validate plans before execution with
/v1/rollout.2,050+ Models
Works with any LLM as the execution engine — GPT-4o, Claude, DeepSeek, Llama, Gemini, Grok, Mistral, Qwen, and 40+ more providers via OpenRouter.
Built for Agents
Designed specifically for agentic workflows — web navigation, task automation, multi-step reasoning.
Proven Results
Benchmarked on WebArena and HotpotQA. Significant lift across all major LLMs.
Sub-10ms Latency
Fast enough to fit in any agent loop. Predict futures without slowing down execution.
Why Agents Need World Models
Traditional LLMs (not Stratus) struggle with multi-step tasks because they:- Don’t plan ahead — Generate one token at a time (greedy decoding)
- Can’t predict outcomes — No internal model of how actions affect state
- Lack foresight — Commit to paths without evaluating consequences
The World Model LayerStratus sits between your agent and the LLM, predicting state transitions in latent space.
It enables zero-shot planning in novel situations by learning the dynamics of how actions change the world.
Explore the Docs
Core Concepts
Understand how Stratus works and when to use it.
API Reference
Complete API documentation and examples.
Authentication
API keys, rate limits, and security.
Dashboard Guide
Navigate the dashboard and manage your account.
Credits & Billing
Pricing, packages, and billing management.