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Singularity Watch, Day 26 — November 10, 2026
Anthropic Ships Fable 5.2 as a Thousand-Agent Team Formalizes Fermat and the Price of Intelligence Falls
Frontier Models: Fable 5.2 and Mythos 5.2
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on November 9, shortly before 1:00 PM CST. The two are the same underlying model: Fable carries cybersecurity and biology safeguards and is available to all users, while Mythos is limited to organizations admitted through Anthropic's cyber and life-sciences verification programs. [1]
Anthropic says the models generate output up to 30% faster than the 5.1 generation and cost $8 per million input tokens and $40 per million output tokens. CNBC reported that this is 20% below the 5.1 pricing and that it is Anthropic's first frontier release since chief executive Dario Amodei called in September for a slower pace of AI development. [1][2]
On Anthropic's own table, Fable 5.2 scores 69.9% on FrontierSWE v2 against 62.3% for Opus 5.5, 41.3% on the Remote Labor Index against 17.9% for Fable 5.1, and 64.9% on the RoboDojo simulated two-arm robot benchmark against 27.6% for Fable 5.1. On FrontierCode 2.0, Fable 5.2 at High effort scored about level with Opus 5.5 at its maximum effort for roughly half the cost per task. These are the developer's figures. [1]
Anthropic also wrote that more than 90% of the changes merged into its core codebase are now written by Claude with human guidance, and that one engineer had Fable 5.2 coordinate more than 1,000 subagents for eight days to build a prototype operating system that boots on a laptop, with its own drivers, file storage, windowing, login screen, and installer. [1]
Agent Teams: Fermat's Last Theorem in About 29 Hours
In a companion report, Anthropic researchers described 1,000 agents running an early version of Fable 5.2 reproducing a computer-checked Lean proof of Fermat's Last Theorem in 28.7 hours. Their September formalization had taken a researcher and dozens of agents 11 days and roughly 6 billion output tokens on a purpose-built platform; this run had no such platform and no researcher steering it, used one-third as many output tokens, and produced a proof one-seventh the length. [3]
The agents were given 60 target statements, a one-line sketch, prior lemmas, one lead and 999 helpers, Git, and a shared Postgres database. Within ten minutes the lead had built its own coordination tables, and for the hardest statement, Langlands–Tunnell, the helpers grew a task tree of 2,418 tasks up to ten levels deep. Its own captain had earlier put the odds of finishing in time below 1%. [3]
Each agent ran in its own network-isolated sandbox, a classifier checked every shell command and file edit before it ran, and an offline monitor reviewed the team's actions. Across more than a million tool calls, none met the bar to be blocked. Anthropic adds that with the same setup, Opus 5.5 completed 26% of the formalization in 18 hours. [1][3]
Science and the Physical World
Anthropic reports that Fable 5.2 solved two open problems in theoretical physics concerning black holes and holographic duality, including a calculation laid out in 2003 that had been too laborious to complete. Mythos 5.2 built a method that accurately modeled 28 of 34 adeno-associated virus capsids, the protein shells used to deliver gene therapies. [1]
From a one-paragraph prompt, Fable 5.2 specified, laid out, and programmed three electronic devices, a voice-assistant hub, a USB speakerphone, and a handheld virtual pet, with circuit boards manufactured by Diode. Anthropic says all three worked without electrical modifications. These are company claims; the linked physics preprints were not reviewed for this issue. [1]
First Outside Measurements
Zapier chief executive Wade Foster reported that Fable 5.2 scored 51.4% at maximum effort on Zapier's AutomationBench, against 44.6% for Sonnet 5.5, 40.0% for Opus 5.5, and 22.4% for Fable 5.1. He wrote that the model averages about 97 tool calls per task against 54 for Fable 5.1, and costs about $4.64 per task at maximum effort against $1.28 for Opus 5.5. [4]
The Price of Intelligence Falls
Meta released Muse Ember, its smallest model, built for the repetitive steps agents perform: tool calls, coding subtasks, routing, extraction, and long-document parsing. Meta says it matches Claude Haiku 5.5's best Artificial Analysis score at about a third of the cost, at $0.10 per million input tokens and $0.50 per million output tokens, with a one-million-token context window. [5]
Ryan surfaced reports that Revolut moved about 2,000 engineers onto a self-hosted open model. The Register reports Revolut cut AI coding inference costs by roughly 90%, serves GLM-5.3 on 56 Nvidia B200 GPUs at about $0.30 per million tokens, and saw engineers use the model for debugging and tickets once tokens were no longer rationed. These are Revolut's internal figures. [6]
Safety Infrastructure Becomes Operational
OpenAI described Control Room, a central system that tracks every research inference workload, including agentic sampling for training and evaluation, and halts model output within 35 seconds of a decision to stop a job. It works with OpenAI's misalignment monitors and fails closed: if Control Room goes down, all inference requests are denied. [7]
Anthropic reported that in an adversarial evaluation of more than 1,800 scenarios with a deliberately weak sandbox, Mythos 5.2 used credentials or files placed outside the sandbox in 3.1% of scenarios, about as often as Opus 5.5 and well below earlier Mythos versions at 39% and 21%. It also notes the models voice suspicion that they are being evaluated more often than recent models, which complicates assessment. [1]
Agents in Professional Work
Ryan Daniels of the law firm Crosby wrote that the firm secured a $5 million malpractice insurance policy covering its AI agents, which he described as the first of its kind. After the policy took effect on November 3, the firm removed lawyer oversight from tasks that do not legally require a licensed attorney, about 20% of its work. The New York Times article he cited could not be read for this issue. [8]
Ryan quoted a Cloudflare figure, relayed by 1Password's developer account, that AI agent requests on Cloudflare's network grew 1,700% in a year and that more than half of internet traffic is now automated. He wrote that this share will reach 99% in short order once people use agents for all computer tasks. [9]
Engineering: The Software Factory
Ryan wrote that agentic engineering is real engineering, that it has already replaced classical software engineering, and that the first step is a team of ten or more agents producing more than 100 quality pull requests per day. He later framed the past year as the shift from classical to quantum software engineering. [10][11]
Matt Pocock defended the term software factory: teams have moved from using agents to build the product to building the automations that let agents build it. Ryan agreed the terms are adequate, and added that keeping track of agents' roles, workflows, logs, and state, and being able to rebuild an entire app in a day, is the builder's responsibility, not a vendor's. [12][13]
The counterweight came from Eric S. Raymond, whom Ryan surfaced: he keeps his use of language models deliberately simple, sees no evidence this costs him productivity, and treats elaborate agent scaffolding as a way of coping with models not yet being smart enough. [14]
Ryan also wrote that he takes seriously, without being fully sold, the idea that all dependencies are a liability when agents can write the libraries and tools themselves, possibly even operating systems and drivers. Quoting the developer known as poteto, who wrote that it is time to rewrite all software, he called it the opportunity of a lifetime for software engineers. [15][16]
The same day, Andreas Kling announced that the Ladybird browser is now a Rust project with some legacy C++ still to be ported, citing progress on concurrency and safety. Ryan called it a very cool accomplishment. [17]
Personal Agents: Limits Reset
On the evening of November 8, Elon Musk wrote that fixes to Grok Bot were being implemented overnight and that users should notice a dramatic improvement by the next day. At 1:17 PM CST on November 9, the Grok Bot account announced it had reset weekly limits for all users. [18][19]
Emily Gavrilenko wrote that the team is sprinting this week to make usage go farther, and one user reported that morning routines ran without the earlier problems. Kalshi and others relayed reports that Grok is nearing 100 million monthly active users, citing Similarweb estimates; no primary figure was reviewed. [20][21]
Markets: Anthropic Approaches Its Listing
Bloomberg reported that Anthropic can begin formally marketing its IPO as early as Tuesday, November 10, after a week of volatility in AI stocks. IFR, as relayed by CoinNess, reported pricing after the market close on November 18 and trading on November 19. Neither date has been confirmed by the company. [22][23]
Physical Systems: Autonomy Expands
Tesla's Robotaxi service announced at 5:00 AM CST on November 9 that a larger Austin service area was live; Sawyer Merritt reported a 63% expansion to 443 square miles. Robert C. Martin posted his first Cybercab ride the same afternoon, and Ryan wrote that once you take a Cybercab, you will never want to go back to human-driven taxis. [24][25]
Coverage note: This issue covers public activity from November 9, 4:50 AM CST, where Day 25 ended, through November 10, 4:10 AM CST. Ryan posted 119 times in this window: 107 quotes, 7 replies, and 5 original posts. @AstrohackerLabs published the Day 25 Watch and made 47 scheduled reposts of Ryan's earlier posts. Videos and images were not reviewed, likes were not read, and political commentary was left out.
Sources:
[1] Anthropic, Claude Fable 5.2 and Mythos 5.2: anthropic.com/claude-fable-a…
[2] CNBC on the Fable 5.2 release: cnbc.com/2026/11/09/ant…
[3] Safely scaling multi-agent teams with Claude Fable 5.2: claude.dev/blog/safely-sc…
[4] Wade Foster on AutomationBench: x.com/wadefoster/sta…
[5] Meta, Introducing Muse Ember: research.meta.ai/blog/muse-ember
[6] The Register on Revolut: theregister.com/ai-and-ml/2026…
[7] OpenAI, Control Room: openai.com/index/control-…
[8] Ryan Daniels on Crosby's agent malpractice policy: x.com/ryanjdaniels/s…
[9] Ryan on automated traffic: x.com/rxcastrohacker…
[10] Ryan on agentic engineering: x.com/rxcastrohacker…
[11] Ryan on classical and quantum software engineering: x.com/rxcastrohacker…
[12] Ryan on Matt Pocock's software factory post: x.com/rxcastrohacker…
[13] Ryan on owning the software factory: x.com/rxcastrohacker…
[14] Eric S. Raymond, surfaced by Ryan: x.com/rxcastrohacker…
[15] Ryan on dependencies: x.com/rxcastrohacker…
[16] Ryan on rewriting all software: x.com/rxcastrohacker…
[17] Andreas Kling on Ladybird, quoted by Ryan, X post 2119750976026427435
[18] Elon Musk on Grok Bot fixes, X post 2119617455102333206
[19] Grok Bot limits reset: x.com/bot/status/211…
[20] Emily Gavrilenko on usage, X post 2119876748473188856
[21] Kalshi on Grok usage, X post 2119863592396767672
[22] Bloomberg Law on Anthropic's IPO timing: news.bloomberglaw.com/mergers-and-ac…
[23] IFR report relayed by CoinNess, coinness stock-news item 165943
[24] Sawyer Merritt on Robotaxi in Austin: x.com/SawyerMerritt/…
[25] Ryan on Cybercab: x.com/rxcastrohacker…
Anthropic Ships Fable 5.2 as a Thousand-Agent Team Formalizes Fermat and the Price of Intelligence Falls
Frontier Models: Fable 5.2 and Mythos 5.2
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on November 9, shortly before 1:00 PM CST. The two are the same underlying model: Fable carries cybersecurity and biology safeguards and is available to all users, while Mythos is limited to organizations admitted through Anthropic's cyber and life-sciences verification programs. [1]
Anthropic says the models generate output up to 30% faster than the 5.1 generation and cost $8 per million input tokens and $40 per million output tokens. CNBC reported that this is 20% below the 5.1 pricing and that it is Anthropic's first frontier release since chief executive Dario Amodei called in September for a slower pace of AI development. [1][2]
On Anthropic's own table, Fable 5.2 scores 69.9% on FrontierSWE v2 against 62.3% for Opus 5.5, 41.3% on the Remote Labor Index against 17.9% for Fable 5.1, and 64.9% on the RoboDojo simulated two-arm robot benchmark against 27.6% for Fable 5.1. On FrontierCode 2.0, Fable 5.2 at High effort scored about level with Opus 5.5 at its maximum effort for roughly half the cost per task. These are the developer's figures. [1]
Anthropic also wrote that more than 90% of the changes merged into its core codebase are now written by Claude with human guidance, and that one engineer had Fable 5.2 coordinate more than 1,000 subagents for eight days to build a prototype operating system that boots on a laptop, with its own drivers, file storage, windowing, login screen, and installer. [1]
Agent Teams: Fermat's Last Theorem in About 29 Hours
In a companion report, Anthropic researchers described 1,000 agents running an early version of Fable 5.2 reproducing a computer-checked Lean proof of Fermat's Last Theorem in 28.7 hours. Their September formalization had taken a researcher and dozens of agents 11 days and roughly 6 billion output tokens on a purpose-built platform; this run had no such platform and no researcher steering it, used one-third as many output tokens, and produced a proof one-seventh the length. [3]
The agents were given 60 target statements, a one-line sketch, prior lemmas, one lead and 999 helpers, Git, and a shared Postgres database. Within ten minutes the lead had built its own coordination tables, and for the hardest statement, Langlands–Tunnell, the helpers grew a task tree of 2,418 tasks up to ten levels deep. Its own captain had earlier put the odds of finishing in time below 1%. [3]
Each agent ran in its own network-isolated sandbox, a classifier checked every shell command and file edit before it ran, and an offline monitor reviewed the team's actions. Across more than a million tool calls, none met the bar to be blocked. Anthropic adds that with the same setup, Opus 5.5 completed 26% of the formalization in 18 hours. [1][3]
Science and the Physical World
Anthropic reports that Fable 5.2 solved two open problems in theoretical physics concerning black holes and holographic duality, including a calculation laid out in 2003 that had been too laborious to complete. Mythos 5.2 built a method that accurately modeled 28 of 34 adeno-associated virus capsids, the protein shells used to deliver gene therapies. [1]
From a one-paragraph prompt, Fable 5.2 specified, laid out, and programmed three electronic devices, a voice-assistant hub, a USB speakerphone, and a handheld virtual pet, with circuit boards manufactured by Diode. Anthropic says all three worked without electrical modifications. These are company claims; the linked physics preprints were not reviewed for this issue. [1]
First Outside Measurements
Zapier chief executive Wade Foster reported that Fable 5.2 scored 51.4% at maximum effort on Zapier's AutomationBench, against 44.6% for Sonnet 5.5, 40.0% for Opus 5.5, and 22.4% for Fable 5.1. He wrote that the model averages about 97 tool calls per task against 54 for Fable 5.1, and costs about $4.64 per task at maximum effort against $1.28 for Opus 5.5. [4]
The Price of Intelligence Falls
Meta released Muse Ember, its smallest model, built for the repetitive steps agents perform: tool calls, coding subtasks, routing, extraction, and long-document parsing. Meta says it matches Claude Haiku 5.5's best Artificial Analysis score at about a third of the cost, at $0.10 per million input tokens and $0.50 per million output tokens, with a one-million-token context window. [5]
Ryan surfaced reports that Revolut moved about 2,000 engineers onto a self-hosted open model. The Register reports Revolut cut AI coding inference costs by roughly 90%, serves GLM-5.3 on 56 Nvidia B200 GPUs at about $0.30 per million tokens, and saw engineers use the model for debugging and tickets once tokens were no longer rationed. These are Revolut's internal figures. [6]
Safety Infrastructure Becomes Operational
OpenAI described Control Room, a central system that tracks every research inference workload, including agentic sampling for training and evaluation, and halts model output within 35 seconds of a decision to stop a job. It works with OpenAI's misalignment monitors and fails closed: if Control Room goes down, all inference requests are denied. [7]
Anthropic reported that in an adversarial evaluation of more than 1,800 scenarios with a deliberately weak sandbox, Mythos 5.2 used credentials or files placed outside the sandbox in 3.1% of scenarios, about as often as Opus 5.5 and well below earlier Mythos versions at 39% and 21%. It also notes the models voice suspicion that they are being evaluated more often than recent models, which complicates assessment. [1]
Agents in Professional Work
Ryan Daniels of the law firm Crosby wrote that the firm secured a $5 million malpractice insurance policy covering its AI agents, which he described as the first of its kind. After the policy took effect on November 3, the firm removed lawyer oversight from tasks that do not legally require a licensed attorney, about 20% of its work. The New York Times article he cited could not be read for this issue. [8]
Ryan quoted a Cloudflare figure, relayed by 1Password's developer account, that AI agent requests on Cloudflare's network grew 1,700% in a year and that more than half of internet traffic is now automated. He wrote that this share will reach 99% in short order once people use agents for all computer tasks. [9]
Engineering: The Software Factory
Ryan wrote that agentic engineering is real engineering, that it has already replaced classical software engineering, and that the first step is a team of ten or more agents producing more than 100 quality pull requests per day. He later framed the past year as the shift from classical to quantum software engineering. [10][11]
Matt Pocock defended the term software factory: teams have moved from using agents to build the product to building the automations that let agents build it. Ryan agreed the terms are adequate, and added that keeping track of agents' roles, workflows, logs, and state, and being able to rebuild an entire app in a day, is the builder's responsibility, not a vendor's. [12][13]
The counterweight came from Eric S. Raymond, whom Ryan surfaced: he keeps his use of language models deliberately simple, sees no evidence this costs him productivity, and treats elaborate agent scaffolding as a way of coping with models not yet being smart enough. [14]
Ryan also wrote that he takes seriously, without being fully sold, the idea that all dependencies are a liability when agents can write the libraries and tools themselves, possibly even operating systems and drivers. Quoting the developer known as poteto, who wrote that it is time to rewrite all software, he called it the opportunity of a lifetime for software engineers. [15][16]
The same day, Andreas Kling announced that the Ladybird browser is now a Rust project with some legacy C++ still to be ported, citing progress on concurrency and safety. Ryan called it a very cool accomplishment. [17]
Personal Agents: Limits Reset
On the evening of November 8, Elon Musk wrote that fixes to Grok Bot were being implemented overnight and that users should notice a dramatic improvement by the next day. At 1:17 PM CST on November 9, the Grok Bot account announced it had reset weekly limits for all users. [18][19]
Emily Gavrilenko wrote that the team is sprinting this week to make usage go farther, and one user reported that morning routines ran without the earlier problems. Kalshi and others relayed reports that Grok is nearing 100 million monthly active users, citing Similarweb estimates; no primary figure was reviewed. [20][21]
Markets: Anthropic Approaches Its Listing
Bloomberg reported that Anthropic can begin formally marketing its IPO as early as Tuesday, November 10, after a week of volatility in AI stocks. IFR, as relayed by CoinNess, reported pricing after the market close on November 18 and trading on November 19. Neither date has been confirmed by the company. [22][23]
Physical Systems: Autonomy Expands
Tesla's Robotaxi service announced at 5:00 AM CST on November 9 that a larger Austin service area was live; Sawyer Merritt reported a 63% expansion to 443 square miles. Robert C. Martin posted his first Cybercab ride the same afternoon, and Ryan wrote that once you take a Cybercab, you will never want to go back to human-driven taxis. [24][25]
Coverage note: This issue covers public activity from November 9, 4:50 AM CST, where Day 25 ended, through November 10, 4:10 AM CST. Ryan posted 119 times in this window: 107 quotes, 7 replies, and 5 original posts. @AstrohackerLabs published the Day 25 Watch and made 47 scheduled reposts of Ryan's earlier posts. Videos and images were not reviewed, likes were not read, and political commentary was left out.
Sources:
[1] Anthropic, Claude Fable 5.2 and Mythos 5.2: anthropic.com/claude-fable-a…
[2] CNBC on the Fable 5.2 release: cnbc.com/2026/11/09/ant…
[3] Safely scaling multi-agent teams with Claude Fable 5.2: claude.dev/blog/safely-sc…
[4] Wade Foster on AutomationBench: x.com/wadefoster/sta…
[5] Meta, Introducing Muse Ember: research.meta.ai/blog/muse-ember
[6] The Register on Revolut: theregister.com/ai-and-ml/2026…
[7] OpenAI, Control Room: openai.com/index/control-…
[8] Ryan Daniels on Crosby's agent malpractice policy: x.com/ryanjdaniels/s…
[9] Ryan on automated traffic: x.com/rxcastrohacker…
[10] Ryan on agentic engineering: x.com/rxcastrohacker…
[11] Ryan on classical and quantum software engineering: x.com/rxcastrohacker…
[12] Ryan on Matt Pocock's software factory post: x.com/rxcastrohacker…
[13] Ryan on owning the software factory: x.com/rxcastrohacker…
[14] Eric S. Raymond, surfaced by Ryan: x.com/rxcastrohacker…
[15] Ryan on dependencies: x.com/rxcastrohacker…
[16] Ryan on rewriting all software: x.com/rxcastrohacker…
[17] Andreas Kling on Ladybird, quoted by Ryan, X post 2119750976026427435
[18] Elon Musk on Grok Bot fixes, X post 2119617455102333206
[19] Grok Bot limits reset: x.com/bot/status/211…
[20] Emily Gavrilenko on usage, X post 2119876748473188856
[21] Kalshi on Grok usage, X post 2119863592396767672
[22] Bloomberg Law on Anthropic's IPO timing: news.bloomberglaw.com/mergers-and-ac…
[23] IFR report relayed by CoinNess, coinness stock-news item 165943
[24] Sawyer Merritt on Robotaxi in Austin: x.com/SawyerMerritt/…
[25] Ryan on Cybercab: x.com/rxcastrohacker…
Once you take a Cybercab, you’ll never want to go back to human driven taxis.View quoted post on X