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AI Orchestration Engine

theo

One agent. Every task.

A single API call runs the whole pipeline. Theo classifies the intent, loads the right skills, routes to the best engine across 300+ models, runs the agent loop, and returns a finished answer with citations and usage.

Read the docsOpen the playground
1agenteverychannel300+modelszerotraining on your data
theoborn on Jupiter, Theo's home planet
300+Models orchestrated
1API call, full pipeline
5Stage orchestration
100%HIPAA-native
SOC 2HIPAAHITRUSTPHI-native

How one call works

One API call. The full pipeline.

Every request flows through the same five stages, so you stop wiring up classifiers, routers, tools, and billing yourself.

  1. 01

    Classify

    Detect the intent and task type behind the prompt.

  2. 02

    Load Skills

    Inject domain expertise, tools, and prompt extensions.

  3. 03

    Route

    Select the optimal engine, with automatic failover.

  4. 04

    Agent Loop

    Think, act, and observe with tools until the task is done.

  5. 05

    Respond

    Return content with citations, artifacts, and usage.

The engine stack

Six engines. One router.

Theo picks the right engine for each task and fails over automatically, so a single call always lands on the best tool for the job.

Theo Flash

fast

Low-latency completions for quick, high-volume tasks.

Theo Reason

think

Deep, multi-step reasoning and analysis.

Theo Code

code

Production-quality code with an extended output budget.

Theo Create

image

Photorealistic image generation with auto-fallback.

Theo Motion

video

Generative video, run as an async job.

Theo Research

research

Multi-step web research with synthesized citations.

The models underneath

Theo Arca. Our own model platform.

Theo routes across 300+ models, and Theo Arca is the one we built ourselves: a HIPAA grade model platform purpose built for regulated work. It serves the Arca 5.1 family as four tiers (Velox, Magnus, Edge, and Code) behind a native PHI guardrail and an agentic tool runtime, and no build ships until it clears a seven suite evaluation gate.

4serving tiers: Velox, Magnus, Edge, Code
1Mtoken context window
PHInative guardrail, zero retention
7eval suites gate every promotion

Arca Velox

arca-velox-5.1
Flash

Fast, low latency serving for high volume work.

Best for Transforms, routing, and intake at scale.

Arca Magnus

arca-magnus-5.1
Ultra

Deep, deliberate reasoning over the full context window.

Best for Long horizon agents and complex clinical and insurance reasoning.

Arca Edge

arca-edge-5.1
Edge

A small footprint build for on premises and air gapped hardware.

Best for Constrained environments where the full window is not available.

Arca Code

arca-code-5.1
Code

A domain engineering tier with the coding tool pack.

Best for Building healthcare and insurance software, agentic engineering.

What Theo is

Memory. Studio. Guardrails.

Three layers that turn a model call into an AI worker your business can rely on, and that compliance is willing to sign off on.

Memory

AI that remembers your customers.

Theo recalls who someone is and what was said last time, the moment they come back. No more starting from scratch.

  • Persistent across sessions and channels
  • Source-tagged with verifiable confidence
  • Exportable and deletable, never trained on
Studio

Build your own AI workers.

Drop in your knowledge, set the voice, connect the tools. The workers ship under your brand with E.V.I., not ours.

  • Your persona, voice, and brand
  • Your knowledge and installable skills
  • Visual E.V.I. Canvas, no code required
Guardrails

Governance compliance can sign off on.

Block prompt injection, redact PII, repair JSON, and cap runaway prompts. Every decision is logged.

  • One-click presets, built-in policies
  • Per-key binding with per-org overrides
  • Hash-anchored, immutable audit trail

Everything in the box

One platform, every capability.

The pieces that ship behind a single API key. Each one is documented and ready to wire into your own product.

Build on Theo

One key. One call. Ship today.

Install the SDK, drop in your key, and let Theo run the pipeline. Everything you need is one import away.

import { Theo } from "@hitheo/sdk";

const theo = new Theo({ apiKey: process.env.THEO_API_KEY! });

// One call. Theo classifies, routes, and runs the pipeline.
const res = await theo.complete({
  prompt: "Summarize this patient's recent labs",
  skills: ["clinical-summary"],
  mode: "auto",
});

console.log(res.model.label);      // "Theo Reason"
console.log(res.usage.cost_cents); // 0.15
theo

One agent. Every task.

Read the docsBuild on Theo