Chain your models.
Remove their blind spots.

Run your prompt through multiple LLMs in sequence — each one covers the last one's weaknesses. ChatGPT, Claude, Gemini, Perplexity, Grok.

One-time purchase · Lifetime access · All future updates

See how it works
The problem with using AI today
Vague in, vague out

Most people write prompts that are too short and unstructured. The AI guesses what you want — and usually guesses wrong. You re-prompt 5 times.

Same prompt, every model

GPT, Claude, Gemini — each thinks differently. Copy-pasting the same prompt into all of them wastes what makes each one good.

One shot, hope for the best

You ask one AI, take whatever it gives you, and move on. No second opinion, no refinement. You're settling for the first draft every time.

See the difference

One prompt. Three models. Zero waste.

Pick your role. See how ChainRun builds a custom chain for your exact problem.

How it works
01
Describe your problem
Type what you need — plain language, rough notes, whatever you have.
02
ChainRun takes over
Detects what you need, structures it for the right model, fixes common mistakes.
03
Get the real answer
One model or all five in a chain. The AI finally understands what you actually meant.
What's inside
Smart Routing
Detects your intent and routes to the right model with optimized instructions.
Auto Chain
Run your prompt through multiple LLMs. Each step refines the output.
7 Intent Types
Auto-detects Code, Research, Creative, Structured, Summary, and more.
Anti-Pattern Fixer
Rewrites vague, passive, and under-specified prompts automatically.
Secure checkout via Stripe
No subscription — pay once, own forever
Works on iPhone, Android, and desktop
Your API keys never leave your device
Installs as a native app from your browser
Launch Price
$19
one-time · lifetime access
  • ChatGPT, Claude, Gemini, Perplexity, Grok
  • Auto Chain multi-model pipeline
  • 7 intent types with auto-detection
  • Anti-pattern fixer
  • Custom prompt profiles
  • Installable PWA — works offline
  • All future updates included

Secure checkout via Stripe. No subscription.

In Development
$49/mo
Pro · for power users
  • Everything in V1
  • Custom chain builder — pick your own models
  • Chain templates & sharing
  • Parallel model execution
  • Output comparison & diff view
  • Chain history & analytics
  • Priority support

V1 owners get early access + reduced pricing.

Questions

A multi-model orchestration tool. It chains your LLMs together so each one covers the others' weaknesses — one model gathers, another analyzes, another refines. It also optimizes your prompts per-model and fixes common anti-patterns.

No. $19 once, lifetime access. No recurring charges, no hidden fees.

ChatGPT, Claude, Gemini, Perplexity, and Grok. Each gets optimized system prompts tailored to its strengths.

For chaining (which calls LLMs directly), yes. The single-model optimizer works entirely offline — no keys needed.

After purchase, add ChainRun to your home screen from Safari or Chrome. It runs like a native app — no app store needed.

V2 Pro is in active development. It adds custom chain building, parallel execution, output comparison, and more. No timeline yet — we ship when it's ready. V1 owners will get early access and a reduced price.

$19 · Lifetime

Payment successful

One more step — install ChainRun on your home screen for the best experience.

chainrun.com
Tap here first
1
Tap the Share button
The icon at the bottom of Safari
2
Scroll down and tap
Add to Home Screen
3
Tap "Add"
ChainRun appears on your home screen — opens like a native app

One tap — adds to your home screen like a native app

1
Tap the menu button
The three-dot ⋮ menu in Chrome
2
Tap "Install app"
Install app or "Add to Home screen"
3
Confirm
ChainRun installs to your home screen
1
Bookmark this page
Or use Chrome's "Install" button in the address bar

You can install anytime from Settings later.

Created with Perplexity Computer

ChainRun

Created with Perplexity Computer
Created with Perplexity Computer
Prompt Profiles

Select a profile to apply its prefix/suffix to every wrapped prompt.

Created with Perplexity Computer

Which AI do you use?

Pick the ones you have accounts with. We'll help you get the API keys.

Created with Perplexity Computer

ChainRun

Try it — paste a prompt below