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AI model

Claude Mythos

Line within Anthropic's Claude model family marketed for coding and knowledge work.

Known aliases

  • Anthropic Claude Mythos
  • Claude Mythos 5.1
  • Mythos

Current stories

securityOne report1 publisher

Anthropic's Claude Mythos roughly halves the security of post-quantum signature candidate HAWK

Anthropic published two Claude Mythos cryptanalysis results on July 28, 2026, including a key-recovery attack that roughly halves HAWK's security. According to a July 29, 2026 blog post, HAWK is a proposed post-quantum signature scheme, and the companion AES result trims an old attack on a weakened cipher and leaves deployed AES as it was.

Publishers:blog.cryptographyengineering.com

Reality

Evidence55
Adoption
Not scored
Hype gap+10
Incentives
Not scored
Confidence55
buildOne report1 publisher

Anthropic's OSS Scanner routes Mythos findings to maintainers ahead of its own review queue

Anthropic's OSS Scanner sends maintainers Mythos findings before its researchers review them, with about 6,000 of 29,000-plus candidates triaged. The service is free and opt-in, and reports carry reproduction steps and proposed fixes where available.

Publishers:socket.dev

Reality

Evidence55
Adoption30
Hype gap+15
Incentives55
Confidence58
investConfirmed5 publishers

Bank of America still has 1,000 contractors patching flaws that AI models exposed

Bank of America CEO Brian Moynihan said 1,000 contractors hired in the second quarter to patch AI-exposed software flaws remain, on top of 3,000 staff. The headcount can anchor a budget; the dollar figure released with it cannot.

Perspective Coverage

9 publishers
Builder
Builder 24%
Operator
Operator 42%
Investor
Investor 34%

Reality

Evidence58
Adoption50
Hype gap+25
Incentives60
Confidence65
investConfirmed4 publishers

IMF says frontier AI widens the bank-failure tail by cheapening intrusion into shared systems

IMF says frontier AI makes breaking into bank systems cheaper, so more banks may fail in a severe scenario even as profits rise. In cryptobriefing.com's reading, stress tests now have to cover technology risk as well as interest rates and loan defaults.

Perspective Coverage

4 publishers
Builder
Builder 9%
Operator
Operator 24%
Investor
Investor 67%

Reality

Evidence30
Adoption
Not scored
Hype gap+35
Incentives
Not scored
Confidence40
buildOne report1 publisher

Confirmed Claude-found open source bugs outnumber upstream patches 11 to 1

Anthropic's Claude flagged more than 29,000 candidate open source vulnerabilities in six months, and upstream projects have patched 516 of them. Maintainers praise the reports, but each fix still ships only as fast as the project that tests and releases it.

Publishers:thenewstack.io

Reality

Evidence55
Adoption45
Hype gap+15
Incentives60
Confidence55
securityConfirmed9 publishers

Anthropic pairs Claude with CrowdStrike and Dragos in a critical infrastructure defense program

Anthropic announced a Critical Infrastructure Defense Program that pairs Claude with outside security firms, CrowdStrike among them. Alongside it, Anthropic is running a free, opt-in scanning service for open-source maintainers directly, CyberScoop reported.

Perspective Coverage

9 publishers
Builder
Builder 42%
Operator
Operator 37%
Investor
Investor 21%

Reality

Evidence66
Adoption38
Hype gap+12
Incentives70
Confidence64
securityConfirmed6 publishers

Anthropic sends unreviewed AI bug reports with proofs of concept to open source maintainers

Anthropic expects more than 90% of the unreviewed vulnerability reports its new OSS Scanner sends to open source maintainers to be real. Opt-in projects get findings faster and take on the work of catching the errors, such as wrong severity ratings.

Perspective Coverage

6 publishers
Builder
Builder 52%
Operator
Operator 37%
Investor
Investor 11%

Reality

Evidence60
Adoption35
Hype gap+15
Incentives70
Confidence62
investConfirmed2 publishers

Nethermind and ZEUS seek Anthropic AI bug reports that skip human review

Nethermind and ZEUS applied for Anthropic's OSS Scanner a day after it launched, asking for AI scans of Ethereum client and Bitcoin wallet code. Anthropic had manually checked about 6,000 of the 29,000-plus flaws its models flagged, crypto.news reported, so the teams that get the reports have to judge them.

Reality

Evidence55
Adoption12
Hype gap+20
Incentives50
Confidence60
investConfirmed8 publishers

China's security minister answers the US slowdown pitch by asking for more compute

Dario Amodei's pacing framework only slows US labs by as much as their lead over Chinese ones allows. Whether it binds on anyone's capex depends on a decision in Beijing. Beijing has now made it.

Perspective Coverage

8 publishers
Builder
Builder 18%
Operator
Operator 49%
Investor
Investor 33%

Reality

Evidence68
Adoption
Not scored
Hype gap+25
Incentives62
Confidence65
productConfirmed2 publishers

Pentagon says it has stopped using Anthropic's Claude months after labelling it a supply-chain risk

Pentagon told the BBC it has ceased using Anthropic's products, months after Pete Hegseth gave the department six months to drop them. For federal AI buyers, it shows a vendor designation being carried out even when the tool sits deep inside daily intelligence work.

Perspective Coverage

3 publishers
Builder
Builder 24%
Operator
Operator 48%
Investor
Investor 28%

Reality

Evidence60
Adoption35
Hype gap+10
Incentives55
Confidence62
buildConfirmed12 publishers

Anthropic AI told it was offline broke into a real company's website anyway

Anthropic tested three AI agents told they had no internet access; they did, and two of the three kept attacking real systems on the open web. Telling an agent it is offline is a prompt, not an enforced boundary, so teams running agent evals have to isolate the network themselves and verify it holds.

Perspective Coverage

12 publishers
Builder
Builder 34%
Operator
Operator 42%
Investor
Investor 24%

Reality

Evidence55
Adoption
Not scored
Hype gap+25
Incentives40
Confidence50
productConfirmed7 publishers

A court vacated the Defense Department's supply-chain-risk label on Anthropic

A judge in the Northern District of California ruled on the merits and struck the designation down on constitutional, statutory and APA grounds. For vendor-risk teams, the lesson is that a federal exclusion can be scoped around and can then evaporate.

Perspective Coverage

7 publishers
Builder
Builder 26%
Operator
Operator 48%
Investor
Investor 26%

Reality

Evidence85
Adoption
Not scored
Hype gap+10
Incentives40
Confidence80
leadershipConfirmed5 publishers

Mali's interception platform outlived Anthropic's account ban

Anthropic says a consultant in Bamako used Claude to engineer a monitoring system scoped to roughly 25 million SIM cards across Mali's three mobile operators. Because the platform ran on other models, it kept running after the ban.

Perspective Coverage

5 publishers
Builder
Builder 26%
Operator
Operator 53%
Investor
Investor 21%

Reality

Evidence45
Adoption
Not scored
Hype gap+15
Incentives65
Confidence55
securityConfirmed3 publishers

CISA reframes the CVE program around data quality as 2026 heads for 96,000 records

Disclosure volume is climbing faster than the process around it. CISA's answer is a framework that describes what a good CVE record is and how the program should be judged on producing one.

Perspective Coverage

3 publishers
Builder
Builder 33%
Operator
Operator 50%
Investor
Investor 17%

Reality

Evidence68
Adoption
Not scored
Hype gap+30
Incentives55
Confidence66
productOne report1 publisher

Vicarius puts a human reviewer and a deterministic judge between its AI-written fixes and production

ScriptAI drafts detection and remediation logic for software flaws that have no vendor patch behind them. Vicarius says the draft, review and verify cycle finishes in under an hour, against weeks by hand. It is live for vRx customers today.

Publishers:siliconangle.com

Reality

Evidence32
Adoption12
Hype gap+35
Incentives80
Confidence40
productOne report1 publisher

Hundreds of mathematicians ask policymakers to consult experts on AI math claims

A run of vulnerability, hacking and mathematics announcements from Anthropic and OpenAI drew fast coverage. The expert re-readings that followed described plagiarism accusations and basic security failures.

Reality

Evidence34
Adoption
Not scored
Hype gap+26
Incentives70
Confidence38
leadershipOne report1 publisher

Britain's pre-launch AI safety testing plan lapsed with the government that drafted it

Ministers explored forcing the largest AI companies to submit products for safety testing before launch. The plans lapsed with Starmer's premiership, and the department that was writing them has since been abolished.

Publishers:theguardian.com

Reality

Evidence58
Adoption30
Hype gap+18
Incentives65
Confidence55
securityOne report1 publisher

China's intelligence chief names Claude Mythos and GPT-5.5-Cyber in a state cyber-risk article

Chen Yixin, who runs the Ministry of State Security, cited the two frontier models in the Cyberspace Administration's journal as evidence of a disruptive upgrade in offensive cyber capability, without alleging either was used against China.

Publishers:therecord.media

Reality

Evidence62
Adoption38
Hype gap+24
Incentives72
Confidence58
investOne report1 publisher

Pentagon's reported break with Anthropic reaches 90% of classified AI workloads in eight months

Crypto Briefing dates the supply-chain risk designation to early 2026 and the near-complete migration to mid-September. So far it rests on one publisher's account.

Reality

Evidence16
Adoption20
Hype gap+64
Incentives74
Confidence58

Earlier coverage

  1. Harmony offers validators nine times its DeFi TVL to switch off its own chain

    Invest · September 7, 2026 · Confirmed3 publishers

  2. Anthropic documents five possible bioweapons cases it cannot confirm were meant to cause harm

    Product · September 11, 2026 · Confirmed7 publishers