Breaking: Fable 5.1 has been leaked, and Claude has once again suffered a massive global outage.

Just today, Fable 5.1 was exposed to have launched its gray-scale test.

Sources say that some Claude users have already started using Fable 5.1 for free.

The first to break the news is leo@synthwavedd, a widely recognized reliable leaker in the industry.

He revealed that the successor to Fable 5, most likely named Fable 5.1, has entered a small-scale gray-scale test.

If you selected Fable 5 when using the Claude Web interface, or you are using Claude Code, you may well have been quietly taken over by Fable 5.1.

Earlier last weekend, Anthropic released a report stating that it had internally developed Model 2, which is more powerful than Mythos, but will not release it to the public.

Fable 5.1 is About to Be Fully Rolled Out

After the news broke, multiple sources speculated that it is very likely to be true.

This is exactly how Fable 5 was released back then.

Back in early June, the day Fable 5 was fully launched, things were almost the same as now: a small group of users (about 5%) were selected for a quiet test first, and the full rollout was completed the very same day.

The so-called purpose of gray-scale testing is to use a small amount of real traffic as a touchstone, and if the operation remains stable, the product will be officially launched.

The situation today is very similar, which means the full rollout of Fable 5.1 is just around the corner!

The good news is that Fable 5.1 will most likely not see a price increase.

It will most likely continue the current pricing of $10 per million input tokens and $50 per million output tokens, offering more capabilities at no extra cost.

For developers, this is really a very cost-effective deal.

In short, Fable 5.1 will most likely be released before the end of August.

What is even more exciting is that the scenario where the gray-scale test and full release happen on the same day has occurred before.

The Most Powerful Model Gets Its Tight Restraints

Why are people so eager for Fable 5.1?

That day, Anthropic dropped two shocking announcements in a row: Fable 5 and Mythos 5 were unveiled together.

However, the full version of the most powerful Mythos 5 is only open to a very small number of national security agencies by the official; the public version of Fable 5 that ordinary users can access is the version added with a "security classifier".

As a result, only three days after its launch, Fable 5 was urgently suspended due to its excessively strong performance, and access was not restored until July 1.

Moreover, when you call Fable 5, once the security classifier is triggered, the conversation will be taken over by Opus 5.

In addition, the official has been continuously tightening the security measures for Fable 5 on its official page, with the latest update in early August.

To describe Fable 5 in one sentence: it has powerful performance but is restricted everywhere.

Therefore, developers across the network are now calling for Fable 5.1 very strongly.

A developer @babayagatwt said he has three wishes as follows.

1. Get Fable 5.1

2. Get rid of the damn 5-hour usage limit

3. Let Fable cover 100% of the usage quota

Some people also ask: Is Fable 5.1 just an improved version of the restricted Mythos?

In response, leaker Pankaj Kumar gave a very straightforward answer: "To be honest, they will not release the full version of Mythos."

Moreover, some people have noticed that Fable 5 has obviously become less capable in the past few weeks. Could this be exactly because Fable 5.1 is coming?

Claude Suffers a Global Major Outage!

What is more interesting is that on the same day the new model was being tested secretly, Claude experienced a total system outage again.

Earlier this morning, Anthropic's models suffered a sudden global major outage.

The disaster struck on schedule. Mythos 5, Fable 5, Opus 5, Sonnet 5, and Haiku 4.5 were all affected. claude.ai, API clients, and Claude Code all experienced service fluctuations for nearly 3 hours!

This is already the 166th service outage of Claude this year.

In just the past five days, it has crashed a total of 7 times: service outage on the 16th, performance degradation on the 17th, total system failure on the 18th... it almost crashes once a day.

This frequent outage may also be related to the leak of Fable 5.1.

Why are Anthropic's servers so prone to crashing? Most likely because there is not enough computing power available.

At the same time, the 50% weekly quota increase for Claude Code has been extended to the end of this month, and the company openly admits that computing power will be tight in the coming weeks.

The day before the outage, this news shook Wall Street: Anthropic's annualized revenue has soared to 65 billion US dollars! It has surged 7 times compared to the end of last year, directly leaving its old rival OpenAI's 40 billion annualized revenue behind, and is targeting a trillion-dollar scale by the end of the year!

To handle this explosive business growth, Anthropic's senior management has gone all out.

Through the SPV structure, they have locked in about 71 billion US dollars in chip lease debts.

At the same time, they have just secured a 5 billion US dollar strategic investment from AMD.

In addition, they have signed multiple record-breaking large data center contracts!

The ultimate goal of all these moves is to hit the IPO window in September-October with a valuation of nearly one trillion US dollars.

While sprinting towards a trillion-dollar valuation, the company's models keep suffering global outages, which is the current contradictory situation Anthropic is facing.

The Eve of the ASI Showdown in August, the Hidden Card Is Exposed

At present, Anthropic's new model is already ready to be launched.

Facing the continuous pressure from OpenAI, Anthropic has adopted the "Tian Ji's Horse Race" strategy: hold back the full force and launch precise strikes.

This timing is also very subtle.

For Anthropic, Fable 5.1 is not just a simple "version number + 0.1".

It must prove that the company can absorb tens of billions of dollars in computing power investment, and it is also a trump card that must be played on the eve of the IPO.

This time, if Fable 5.1 does not have obvious performance improvements, Anthropic will probably face greater pressure.

There are only the last ten days left in August, let's wait for Anthropic to show its final card.

References:

https://x.com/synthwavedd/status/2089719312340693316 

https://x.com/kimmonismus/status/2089722853461483870 

This article is from the WeChat official account "AI Era", author: ASI Revelation, published with authorization from 36Kr.