/AI2h ago

Replit launches a "High Effort" mode powered by Anthropic's Claude Fable 5 to handle complex agent builds

Agent usage costs are discounted 25% for one week

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Original postAmjad Masad#360
Manny Bernabe@MannyBernabe

Claude Fable 5 now available on Replit. Build something amazing! 馃殌

Claude@claudeai

Introducing Claude Fable 5: a Mythos-class model that we鈥檝e made safe for general use.

Its capabilities exceed those of any model we鈥檝e ever made generally available.

10:59 AM 路 Jun 9, 2026 路 5K Views
Sentiment

Many users praised Replit's High Effort Mode powered by Claude Fable 5 as exciting and well-executed by the team, while a few objected that it risks locking developers in and overstated the capabilities.

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83.3%
Neg
16.7%
9 comments with sentiment.
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High Effort handles your most complex builds with ease on Replit.

Now powered by Claude Fable 5.

25% off for the next 7 days.

2hViews 34.8KLikes 87Bookmarks 10
BOOKMARKS35LIKES274RETWEETS13REPLIES16

Try Claude Mythos at 25% off on Replit.

High Effort handles your most complex builds with ease on Replit.

Now powered by Claude Fable 5.

25% off for the next 7 days.

2hViews 23.4KLikes 274Bookmarks 35
Zhen Li@zhenthebuilder

Added a magic toggle called high effort in @Replit , meaning 1. Agent building in highest effort 2. Fable 5 making complex decisions 3. 25% off agent cost with high efforts

I鈥檝e been using this mode and it feels like a step up in terms of building complex apps, magical experience

High Effort handles your most complex builds with ease on Replit.

Now powered by Claude Fable 5.

25% off for the next 7 days.

2hViews 4.3KLikes 29Bookmarks 4
Ken Goyarola@Kaygeeartworks

It's literally game time on @Replit . Go make one!

High Effort handles your most complex builds with ease on Replit.

Now powered by Claude Fable 5.

25% off for the next 7 days.

2hViews 2.7KLikes 8Bookmarks 2
Alpha Batcher@alphabatcher

@MannyBernabe Claude Fable 5 already everywhere

too fast

2hViews 49Likes 1
Jazy@jazywho

@amasad Hey Amjad

How do i get in contact with you?

2hViews 71
Zsolt@zsolt_vereb

@amasad That's not Mythos. Not by a long shot.

1hViews 20Likes 1
AdiiX@adiix_official

@MannyBernabe Claude Fable 5.0, make me a business, don鈥檛 make mistakes馃榿

2hViews 18Likes 1
Alvaro Balbin@elalvarobalbin

@amasad this is how replit locks devs into their environment before anyone notices they cant leave without losing all the context

1hViews 47
Varun Dogar@varunvibe

@pirroh The man behind the mission..great work by @Replit and your team looking after builders!

2hViews 47
Devilfruitchess@devilfruitchess

@pirroh Can i hear one good reason to use this and not claude code directly?

1hViews 41
Luke Haines@LukeGainzz

@amasad Did you deliberately call it Mythos rather than Fable?

1hViews 40
Dugi@DugiBlast

@amasad

2hViews 32
Rugbist@rugbist_

@pirroh fable 5 really made replit capable of high effort lol

whats the catch with the 25% off?

2hViews 32
Jeroen Van den Bosch@Illusionweaver1

@amasad Let's give it a try & find out how it handles complex game dev!

1hViews 30
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