Questions, answered.

An A/B test between your drafts. Send 2 to 20 variants of a subject line, SMS, push or headline, with your current copy first. Neural 2.1, trained on billions of real sends, ranks them head to head and predicts each one's lift in clicks over your current copy (opens, for push). You get the predicted winner before anyone on your list sees a thing.

Open our listing in Claude's connector directory, choose Connect, then approve it on A/B Simulate. ChatGPT takes a few more steps, and our How to connect page walks you through both.

2 to 20 in one simulation, and it's 1 credit whatever the number. A single line can't be simulated, because there's nothing to test it against. Your assistant will write a few alternatives and try again, and the refused request doesn't use a credit.

The first variant you send. Put your current or default copy there: the line you'd send if you didn't test. Every other variant's predicted lift is measured against it. Tell your assistant which line you'd normally use and it puts that one first.

Neural 2.1 scores every variant against the control and ranks them by predicted clicks (opens, for push). The winner is the variant with the highest predicted lift, and there's always a single order: if two variants tie exactly, the one you listed first ranks higher. It's a prediction, not a guarantee, so treat a narrow lead as a close call.

Email subject lines, preheaders, push, SMS, ad headlines, web headlines and social posts. Email subject lines, preheaders and push are calibrated. The others are provisional, since Neural 2.1 isn't calibrated for them yet, so treat their predicted lift as a guide. SMS shows the order only, without a lift.

1 simulation = 1 credit, whether it has 2 variants or 20. Free includes 10 credits a month, and paid plans include 100, 300 or 1,000. Plan credits reset on the first day of each month (UTC) and don't roll over.

No. Your assistant writes. A/B Simulate runs the test. Keeping those jobs apart means you can use any assistant and any writing style, and the simulation stays impartial.

No. Simulations work straight away, and A/B Simulate never connects to your email platform itself. If your assistant can reach it, the assistant can share how each send did. That's free on every plan.

Neural 2.1 learned from many brands and works from your first simulation. It improves your odds rather than guaranteeing a result. Share your results and you'll see how its predicted winners hold up on your own sends.

That's where a simulation earns its keep. A/B Simulate runs the test without spending a single send, so you get a read on copy you could never test fairly.

When you can, yes. Simulate first and test your top two, so both halves of your list get a line worth sending. When you can't, send the predicted winner.

We store the variants you simulate and their predicted rank and lift, plus any aggregate results you choose to share: clicks and total send volume, and opens and revenue if included. We don't ask for subscriber lists, recipient addresses or individual events, and we don't currently use your copy or results to train models.

No. Sharing results is free and optional on every plan. It lets you compare A/B Simulate's predicted winner with what happened after the send.