100+ models · 12 providers · one key

Build anything
with AI.

Describe what you want. We chat it through, plan it, then build it. Or skip the chat and call the SDK yourself.

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Try

Prefer code? Read the SDK docs →

SDK

Or build it yourself

Five lines to your first call. Same API surface in every language. Switch models by changing a string.

$ npm install quantum-ai-sdk

import { QuantumClient, userMessage, responseText } from "quantum-ai-sdk";

const client = new QuantumClient("qai_k_your_key");

const response = await client.chat({
  model: "claude-fable-5-1",
  messages: [userMessage("Build me a REST API for a todo app")],
});

console.log(responseText(response));
// Cost: $0.003 — billed automatically

ChatStreamingImagesVoiceVideoEmbeddingsTTSSTTRAGRealtimeBatchTool Calling

Proof

We build on it too

Every product below runs on the same API, the same billing, and the same SDK you'll use. This is our proof it works.

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Mission Control

The workspace behind quantumencoding.ai — sign in and it is already here, no separate install or account. An architect agent decomposes your project, assigns models, and deploys worker agents in parallel. Watch them read, write, test, and commit in real time, on the same API you call.

· Multi-model orchestration — pick a different model per task
· Full project workspace with file I/O, git, and shell access
· Visual workflow builder, dependency graphs, live agent streams
· Test API calls, compare models, prototype before you code

Open Mission Control →

Your users can build this

Cosmic Duck

A consumer AI app for everyone — chat, voice conversations, image generation, video, music, document processing. Desktop, Android, iOS. Same API, same credits, same key. Proof that the platform scales to consumer products.

· Chat with any model — Claude, GPT, Grok, Gemini, GLM
· Realtime voice, TTS, STT, voice cloning
· Image, video, and music generation
· Cross-platform — Tauri desktop, Android, iOS

Visit cosmicduck.dev →

Models

Every provider. You choose.

Run the same task across providers and compare results, speed, and cost. We route. You decide.

Claude

Anthropic

fable-5.1opus-5sonnet-5haiku-4.5

GPT

OpenAI

gpt-6-astra5.6-sol5.6-terra5.6-luna

Grok

xAI

grok-4.6grok-buildgrok-voice

Gemini

Google

3.8-flash3.5-flash-lite3.1-pro

GLM

Z.ai

glm-5.3glm-5.3-flash

Qwen

Alibaba

qwen3.8-maxqwen3.8-flash

DeepSeek

v4-prov4-flash

Plus ElevenLabs, HeyGen, Meshy, Mistral, and more. Full model list in the docs.

Pricing

Pay for what you use

No subscriptions. No seat fees. No minimum commitment. Per-token pricing, transparent on every request.

How it works

Buy credits

Top up your balance. Credits stay valid for 18 months from purchase. Every API call deducts the exact token cost.

Every request

Transparent cost

Every response includes the exact cost in the headers. No surprises, no hidden fees, no mystery bills.

Volume

Spend more, pay less margin

Past $50 a month, apply for the Developer tier and the margin halves to 12.5%. Enterprise goes lower still.

See full pricing table by model →

Get started

Sign up, start building

No subscription, no minimum. Top up credits when you need them — one key, one bill, every model.

Create your account Read the Docs

Or just describe what you want to build at the top.

Build anything with AI.