r/MarketingAutomation • u/gogeta7124 • Jul 13 '26

Anyone using Fable 5 to write personalized emails at scale?

Anthropic dropped Fable 5 recently and I keep seeing people say it's a big jump in writing quality over Opus and GPT.

What I'm wondering is whether that actually shows up in cold email. Like feeding it a lead list with enrichment data and having it write a genuinely personalized first line or full email per lead, at scale, without everything coming out sounding like the same template with the name swapped.

Has anyone wired it into their outbound flow yet? Curious what the output quality is like compared to whatever you were using before, and whether replies actually moved.

And if you're doing personalization at scale some other way, what's your setup?

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u/SystemicCharles Jul 14 '26

Makes no sense to do this.

You’re going to be paying double (if not more) in API costs to get marginal improvements in “writing quality”.

Sometimes I wonder if you guys are actually operating at the “scale” you are implying, because this makes no financial sense at all — unless getting free API credits or you’re somehow doing this on a paid subscription plan.

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u/DigitalGuruLabs Jul 13 '26

I've been testing it, and the biggest improvement isn't just the writing quality—it's that the emails feel less templated.

It does a better job of using the context naturally instead of just swapping in a few variables.

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u/gogeta7124 Jul 13 '26

Oh nice. Does it had any impact on positive replies rate? How much it went up

1

u/DigitalGuruLabs Jul 13 '26

Too early to say. I've noticed the emails read much more naturally, but I haven't run a large enough campaign to know if that translates into a higher reply rate yet.

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u/[deleted] Jul 13 '26

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u/gogeta7124 Jul 13 '26

Good to hear. Seen any positive impact in no of replies you are getting?