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Frontier AI Offensive Cybersecurity Benchmarks: GPT-5.5 vs. Claude Mythos · history

Version 4

2026-05-02 05:36 UTC · 128 items

Narrative

The central benchmark finding of this thread — that GPT-5.5 achieved parity or a slight edge over Claude Mythos Preview on offensive cybersecurity evaluations — has now solidified from a contested claim into a corroborated consensus across multiple independent outlets. Where the previous synthesis rested the 'marginal GPT-5.5 lead on Terminal Bench 2.0' claim primarily on VentureBeat,[1] two additional technology outlets have now independently published the same finding: Moccet AI's headline reads 'OpenAI Narrowly Tops Claude Mythos Preview on Terminal-Bench 2.0,'[2] and Bytex Technologies describes 'GPT-5.5 Shows Marginal Lead Over Mythos on Terminal Bench 2.0.'[3] This convergence across three distinct outlets — none citing each other in their titles — strengthens the claim that Terminal Bench 2.0 consistently shows a small GPT-5.5 advantage, regardless of whether AISI's aggregate 'statistical tie' framing on its own narrow task suite remains the authoritative top-line characterization. An X post by Andrew Pignanelli also captures social media commentators noting GPT-5.5's benchmark positioning.[4] AISI's official X post linking to the full evaluation is now also directly in the evidence base,[5] adding an authoritative primary-source citation to what had been documented through secondary reports.

The policy and institutional documentation layer has deepened with two significant additions. The 2026 International AI Safety Report's extended policymaker summary is now catalogued in the evidence base,[6] placing the frontier AI cyber capability development within the broader international safety reporting infrastructure that spans multiple governments and research bodies. The OECD has also published a formal PDF report on 'Trends in AI incidents and hazards reported by the media,'[7] which contextualizes the OECD.AI incident registry entry[8] within a broader analytical framework — suggesting the cataloguing of this episode is not a one-off administrative act but part of a systematic tracking effort. DataCamp has published a comprehensive synthesis titled 'GPT-5.5: Benchmarks, Safety Classification, and Availability,'[9] reflecting the story's continued spread into developer-oriented technical media. LetsDataScience has also published a summary framing the announcement as 'OpenAI Announces GPT-5.5-Cyber for Critical Defenders,'[10] consistent with the program's own positioning language. An X post by Shakeel Hashim references 'OpenAI's critique of a model where frontier cyber capabilities...'[11] — the truncated framing suggests OpenAI may be actively articulating a specific argument about the relationship between model architecture and access governance, though the full claim remains unconfirmed from this item alone.

The CSIS skeptical counter-narrative is gaining broader distribution: its 'Beyond Autonomous Attacks: The Reality of AI-Enabled Cyber Threats' piece is now being amplified through LinkedIn via Cyber News Live,[12] widening the audience for institutional skepticism about the dominant alarmed framing. This marks a transition from CSIS publishing a counter-argument to that counter-argument circulating in professional security networks — though it has not yet displaced the consensus framing in primary security trade press. Most other new items in this cycle are background institutional pages for CSIS,[13][14][15][16] one clearly off-topic item,[17] and amplification of coding-oriented GPT-5.5 coverage not directly bearing on the cyber benchmarking story.[18][19] The story continues to mature: the core benchmark debate is now settled enough that new coverage is consolidating existing findings rather than surfacing new claims, while the policy and governance questions — how the international community should respond, whether OpenAI's tiered access model is adequate, and what 'Mythos-class' capability means for defenders — remain actively contested and unresolved.

Timeline

  • 2026-04-01: UK AISI publishes evaluation of Claude Mythos Preview's cyber capabilities, marking the first time AISI formally benchmarks a frontier model on offensive cybersecurity tasks [21]
  • 2026-04-01: Anthropic publishes Claude Mythos Preview alignment risk report; CrowdStrike named as founding security partner [58][59]
  • 2026-04-13: Cloud Security Alliance circulates early draft of 'The AI Vulnerability Storm: Building a Mythos-ready Security Program' PDF guidance document (version date embedded in filename) [51]
  • 2026-04-14: Axios reports OpenAI is rolling out tiered access to advanced AI cyber models, suggesting the Trusted Access framework was established before the April 30 GPT-5.5 public benchmarking [45]
  • 2026-04-15: IBM announces new autonomous security measures to help enterprises confront agentic AI-driven attacks [82][83]
  • 2026-04-20: OECD.AI formally catalogs the frontier AI cyber capability jump as an incident in its international AI incident registry [8]
  • 2026-04-24: Early social media debate emerges over whether Mythos or GPT-5.5 leads on the AISI cyber benchmark, with some suggesting Mythos won [84]
  • 2026-04-30: UK AISI publishes formal evaluation of GPT-5.5 cyber capabilities, finding it comparable to Claude Mythos Preview; AISI's official X post confirms 71.4% pass rate on narrow cyber tasks and links to full evaluation [20][22][23][24][25][64][5]
  • 2026-04-30: VentureBeat, Moccet AI, and Bytex Technologies independently report GPT-5.5 'narrowly tops' or shows 'marginal lead' over Claude Mythos Preview on Terminal Bench 2.0, corroborating a consistent slight GPT-5.5 edge on that specific benchmark; Reddit r/singularity similarly notes slight outperformance on multi-step cyber-attack scenarios [1][2][3][67]
  • 2026-04-30: OpenAI officially introduces GPT-5.5 and simultaneously launches 'Trusted Access for Cyber' with a formal pilot request portal; Sam Altman promotes the rollout via X post; SecureWorld refers to the restricted variant as 'GPT-5.4-Cyber' in a naming discrepancy with all other coverage [27][28][29][30][32][33][34][36][35][38][41][39][40][10]
  • 2026-04-30: XBOW publishes 'GPT-5.5: Mythos-Like Hacking, Open To All,' highlighting public accessibility of GPT-5.5 vs. gated Mythos; framing rapidly adopted by secondary tech media [46][47][48][85]
  • 2026-04-30: Cloud Security Alliance publishes updated version of full PDF guidance document 'The AI Vulnerability Storm: Building a Mythos-ready Security Program' [50][52]
  • 2026-04-30: CSIS publishes 'Beyond Autonomous Attacks: The Reality of AI-Enabled Cyber Threats,' the first major DC think-tank skeptical counter-framing; Dark Reading asks 'What Comes Next' for Mythos in specialized security trade press; Hacker News thread on Mythos cybersecurity capabilities opens [55][65][86][87]
  • 2026-04-30: OpenAI announces expansion of Trusted Access for Cyber with additional tiers; Ilya Kabanov's LinkedIn post on the launch draws 39 professional comments [31][44]
  • 2026-05-01: Story spreads to Spanish and Portuguese social media; The Agent Times frames frontier LLMs as enabling both industrialized cyberattacks and advanced defensive operations; BSCN and other accounts amplify the AISI 'GPT-5.5 matches Mythos' finding internationally [68][69][88][70][71][72][66]
  • 2026-05-02: CSIS 'Beyond Autonomous Attacks' piece amplified to LinkedIn professional security networks via Cyber News Live; DataCamp publishes comprehensive developer-oriented synthesis of GPT-5.5 benchmarks, safety classification, and availability; 2026 International AI Safety Report policymaker summary and OECD PDF on AI incident trends enter the evidence base [12][9][6][7]

Perspectives

UK AI Security Institute (AISI)

Neutral independent evaluator: GPT-5.5 is comparable to Claude Mythos Preview on cybersecurity benchmarks, with a confirmed 71.4% pass rate on narrow cyber tasks; GPT-5.5 described as 'one of the strongest cyber models' AISI has tested; both models represent a new capability tier far ahead of prior-generation models

Evolution: AISI's official X post linking to the full evaluation is now directly in the evidence base, providing a primary source citation; the 71.4% pass rate remains the quantitative anchor; no new statements from AISI in this cycle

[20][21][22][23][24][25][26][5]

OpenAI

Proactively defensive with product differentiation: has formalized a multi-tiered 'Trusted Access for Cyber' program with a dedicated pilot request portal, and a distinct GPT-5.5-Cyber model variant for government and critical infrastructure defenders; Sam Altman personally announced the rollout via X post; a referenced X post suggests OpenAI is actively articulating a critique of 'a model where frontier cyber capabilities' are ungated, implying a specific architectural or access-governance argument

Evolution: A potentially new argumentative thread: Shakeel Hashim's X post references 'OpenAI's critique of a model where frontier cyber capabilities...' which may indicate OpenAI is making a pointed contrast with Anthropic's model access philosophy, but the full claim remains unconfirmed from available evidence

[27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][11]

XBOW (security firm)

Alarmed but framing as democratization: GPT-5.5 brings Mythos-class offensive hacking capability to the general public, removing the gating Anthropic uses for Mythos

Evolution: No new statements from XBOW; thesis continues propagating through aggregators

[46][47][48]

Cloud Security Alliance

Formally engaged and producing actionable enterprise guidance: has escalated from a research note to a full iterative PDF guidance document — 'The AI Vulnerability Storm: Building a Mythos-ready Security Program' — with multiple versioned drafts in April 2026

Evolution: Consistent with prior cycle; no new CSA statements but existing guidance remains the most substantive institutional output

[49][50][51][52][53][54]

CSIS (Center for Strategic and International Studies)

Skeptical counter-framing: 'Beyond Autonomous Attacks: The Reality of AI-Enabled Cyber Threats' positions itself as corrective to the dominant alarmed narratives about AI-autonomous cyberattacks

Evolution: Now being actively amplified through LinkedIn professional security networks via Cyber News Live, widening the audience for institutional skepticism beyond the initial CSIS publication

[55][12][13]

OECD.AI and international policy bodies

International policy recognition: OECD.AI has formally catalogued the frontier AI cyber capability development as an AI incident; the OECD has published broader PDF analysis of AI incident trends, contextualizing this cataloguing within systematic tracking

Evolution: The new OECD PDF on AI incident trends situates the incident registry entry within a broader analytical program, suggesting this is systematic documentation rather than a one-off administrative act

[8][7][6]

Anthropic

Cautious-defensive: Mythos remains gated; risk report published; Project Glasswing frames offensive capability as dual-use for defenders; CrowdStrike partnership signals enterprise security positioning

Evolution: Consistent with prior Mythos approach — no new announcements in this cycle

[56][57][58][59]

National cybersecurity agencies (UK NCSC, ASD, CSE Canada, CSA Singapore)

Defensive warning posture: multiple agencies issuing advisories and guidance on frontier AI cyber threats, urging defenders to prepare

Evolution: Coordinated response continuing; no new agency voices added

[60][61][62][63]

VentureBeat and specialized security trade press

More granular than the AISI top-line: VentureBeat specifically reports GPT-5.5 'narrowly beats' Mythos on Terminal Bench 2.0; this finding is now corroborated by Moccet AI and Bytex Technologies independently; Dark Reading shifts to 'what comes next' posture; DataCamp synthesizes for a developer audience

Evolution: Major corroboration: the 'marginal GPT-5.5 edge on Terminal Bench 2.0' claim has gone from a single-outlet finding to a three-outlet convergent result, making it harder to dismiss as a framing artifact; the claim is now the secondary consensus alongside AISI's aggregate tie

[1][64][2][3][65][9][66]

Social media commentators (multilingual)

Amplification has gone international and is consolidating: English-language accounts continue debating tie vs. slight GPT-5.5 edge; professional commentary on LinkedIn is growing; Andrew Pignanelli's X post signals continued social engagement with benchmark positioning

Evolution: Consolidation phase: new social commentary is primarily reinforcing the settled narrative rather than introducing new claims

[67][68][69][70][71][72][25][4][73][74]

Tensions

  • AISI 'statistical tie' top-line vs. converging multi-outlet Terminal Bench 2.0 edge: AISI calls the models comparable on narrow cyber tasks (71.4% pass rate), but VentureBeat, Moccet AI, and Bytex Technologies all independently report a narrow GPT-5.5 win on Terminal Bench 2.0 — three outlets now converging on the same sub-benchmark result, suggesting the tie framing may be a conservative aggregate that masks a consistent task-specific GPT-5.5 advantage [1][2][3][67][24][25][22][64][26][5]
  • GPT-5.5 vs. GPT-5.5-Cyber product distinction complicates the democratization debate: OpenAI's tiered 'Trusted Access for Cyber' program restricts only the -Cyber variant, while the general GPT-5.5 (which AISI found to be Mythos-class) remains broadly available — making the governance question more complex than a simple 'gated vs. open' binary; a referenced OpenAI critique of 'a model where frontier cyber capabilities' remain ungated may signal OpenAI is making this distinction more explicitly [28][29][75][31][48][46][35][36][11]
  • GPT-5.4-Cyber vs. GPT-5.5-Cyber naming discrepancy: SecureWorld refers to a 'GPT-5.4-Cyber' launch alongside the Trusted Access program expansion, while all other coverage refers to GPT-5.5-Cyber — raising unresolved questions about whether the Trusted Access program has prior model versions or this is a reporting error [38][39][33][40][45]
  • Whether benchmark performance translates to real-world offensive uplift: CSIS's 'Beyond Autonomous Attacks' explicitly frames itself as corrective to overstated autonomous-attack narratives and is gaining distribution in professional networks via LinkedIn, but this skeptical view remains a minority counter-current against the dominant discourse treating AISI benchmark scores as proxies for operational threat capability [55][12][76][77][78][79]
  • Regulatory and governance gap: OECD.AI has catalogued this as an international AI incident within a systematic tracking program, national agencies continue issuing advisories, and CSA is producing iterative enterprise guidance — but no coordinated international access-control framework exists; Anthropic's voluntary gating of Mythos contrasts with OpenAI's tiered-but-partially-open release posture, and the appropriate policy response remains unresolved [8][7][6][60][61][62][63][80][49][50][28]
  • Program scope ambiguity: OpenAI's own materials frame GPT-5.5-Cyber as for 'critical infrastructure defenders' and government partners, but third-party coverage describes the ambition as deploying the model 'at all levels of government to fight hackers' — a significantly broader scope with different eligibility and governance implications [37][28][39][45][81][10]

Sources

  1. [1] OpenAI's GPT-5.5 is here, and it's no potato - VentureBeat — reactive:frontier-ai-cyber-capabilities
  2. [2] GPT-5.5 Arrives: OpenAI Narrowly Tops Claude Mythos Preview on Terminal-Bench 2.0 | Moccet Tech News — reactive:frontier-ai-cyber-capabilities
  3. [3] GPT-5.5 Shows Marginal Lead Over Mythos on Terminal Bench 2.0 | Bytex Technologies — reactive:frontier-ai-cyber-capabilities
  4. [4] For those paying attention to the benchmarks, GPT-5.5 is — reactive:frontier-ai-cyber-capabilities
  5. [5] Read our full evaluation: — reactive:frontier-ai-cyber-capabilities
  6. [6] 2026 Report: Extended Summary for Policymakers — reactive:frontier-ai-cyber-capabilities
  7. [7] [PDF] Trends in AI incidents and hazards reported by the media | OECD — reactive:frontier-ai-cyber-capabilities
  8. [8] Frontier AI Models Accelerate Cyberattack Capabilities - OECD.AI — reactive:frontier-ai-cyber-capabilities
  9. [9] GPT-5.5: Benchmarks, Safety Classification, and Availability — reactive:frontier-ai-cyber-capabilities
  10. [10] OpenAI Announces GPT-5.5-Cyber for Critical Defenders — reactive:frontier-ai-cyber-capabilities
  11. [11] with OpenAI's critique of "a model where frontier cyber capabilities ... — reactive:frontier-ai-cyber-capabilities
  12. [12] Beyond Autonomous Attacks: The Reality of AI-Enabled Cyber Threats — reactive:frontier-ai-cyber-capabilities
  13. [13] Strategic Technologies Blog - CSIS — reactive:frontier-ai-cyber-capabilities
  14. [14] Center for Strategic and International Studies (CSIS) on JSTOR — reactive:frontier-ai-cyber-capabilities
  15. [15] [PDF] Understanding National Security Threats Enabled by Artificial ... — reactive:frontier-ai-cyber-capabilities
  16. [16] Cybersecurity: News, Research, & Analysis | CSIS — reactive:frontier-ai-cyber-capabilities
  17. [17] Self-driving car — reactive:humanoid-robots-commercial-deployment
  18. [18] Is GPT-5.5 Ready for Production Coding Workflows? - Verdent Guides — reactive:frontier-ai-cyber-capabilities
  19. [19] GPT 5.5 Improves Code Quality | Greg Starling posted on the topic — reactive:frontier-ai-cyber-capabilities
  20. [20] Our evaluation of OpenAI's GPT-5.5 cyber capabilities | AISI Work — reactive:frontier-ai-cyber-capabilities
  21. [21] Our evaluation of Claude Mythos Preview's cyber capabilities — reactive:frontier-ai-cyber-capabilities
  22. [22] Our evaluation of OpenAI's GPT-5.5 cyber capabilities — Simon Willison (2026-04-30)
  23. [23] Read our full evaluation: — reactive:frontier-ai-cyber-capabilities
  24. [24] On our narrow cyber tasks, GPT-5.5 achieved a — reactive:frontier-ai-cyber-capabilities
  25. [25] GPT-5.5 hit parity with Claude Mythos on offensive cyber evals. UK AI Security Institute confirmed 71.4% pass rate on mu... — reactive:frontier-ai-cyber-capabilities (2026-05-01)
  26. [26] UK AISI Says GPT-5.5 Is One of the Strongest Cyber Models It Has ... — reactive:frontier-ai-cyber-capabilities
  27. [27] Introducing GPT-5.5 - OpenAI — reactive:frontier-ai-cyber-capabilities
  28. [28] Introducing Trusted Access for Cyber | OpenAI — reactive:frontier-ai-cyber-capabilities
  29. [29] OpenAI Expands Trusted Access Program With GPT-5.5-Cyber - Dataconomy — reactive:frontier-ai-cyber-capabilities
  30. [30] OpenAI’s Sam Altman says GPT-5.5-Cyber to launch for cyber defenders with focus on trusted government access | Today News — reactive:frontier-ai-cyber-capabilities
  31. [31] We're expanding Trusted Access for Cyber with additional tiers for ... — reactive:frontier-ai-cyber-capabilities
  32. [32] Accelerating the cyber defense ecosystem that protects us all - OpenAI — reactive:openai-advanced-account-security
  33. [33] we're starting rollout of GPT-5.5-Cyber, a frontier cybersecurity ... — reactive:frontier-ai-cyber-capabilities
  34. [34] Sam Altman announced GPT-5.5-Cyber on April 30, 2026 — a frontier cybersecurity model deploying to vetted defenders with... — reactive:frontier-ai-cyber-capabilities (2026-04-30)
  35. [35] Request OpenAI Pilot: Trusted Access For Cyber — reactive:openai-advanced-account-security
  36. [36] Trusted access for the next era of cyber defense - OpenAI — reactive:openai-advanced-account-security
  37. [37] OpenAI wants to put its most powerful model at all levels of government to fight hackers | Business | kten.com — reactive:frontier-ai-cyber-capabilities
  38. [38] OpenAI Launches GPT-5.4-Cyber, Expands Trusted Access Program as AI Defense Race Heats Up — reactive:frontier-ai-cyber-capabilities
  39. [39] OpenAI prepares GPT-5.5-Cyber for trusted security researchers - Techzine Global — reactive:frontier-ai-cyber-capabilities
  40. [40] OpenAI to roll out GPT-5.5-Cyber with restricted access: Sam Altman — reactive:frontier-ai-cyber-capabilities
  41. [41] Sam Altman reveals GPT-5.5-Cyber model launch with new AI defence strategy — reactive:frontier-ai-cyber-capabilities
  42. [42] OpenAI will roll out GPT-5.5-Cyber to critical cyber defenders, CEO ... — reactive:frontier-ai-cyber-capabilities
  43. [43] Jonathan R.'s Post - LinkedIn — reactive:frontier-ai-cyber-capabilities
  44. [44] Introducing Trusted Access for Cyber | Ilya Kabanov | 39 comments — reactive:frontier-ai-cyber-capabilities
  45. [45] OpenAI rolls out tiered access to advanced AI cyber models - Axios — reactive:frontier-ai-cyber-capabilities
  46. [46] XBOW - GPT-5.5: Mythos-Like Hacking, Open To All — reactive:frontier-ai-cyber-capabilities
  47. [47] “Mythos-like hacking, open to all”: Industry reacts to OpenAI's GPT 5.5 — reactive:frontier-ai-cyber-capabilities
  48. [48] GPT-5.5 Brings Mythos-Like Hacking to the Masses | Awesome Agents — reactive:frontier-ai-cyber-capabilities
  49. [49] Claude Mythos and the AI Autonomous Offensive Threshold — reactive:frontier-ai-cyber-capabilities
  50. [50] [PDF] The “AI Vulnerability Storm”: Building a “Mythos- ready” Security Program — reactive:frontier-ai-cyber-capabilities
  51. [51] [PDF] The “AI Vulnerability Storm”: Building a “Mythos- ready” Security ... — reactive:frontier-ai-cyber-capabilities
  52. [52] Cloud Security Alliance Draft Paper on Mythos-Class Capability ... — reactive:frontier-ai-cyber-capabilities
  53. [53] Cloud Security Alliance Introduces New Tool for Assessing | CSA — reactive:frontier-ai-cyber-capabilities
  54. [54] Cloud Security Alliance launches AI risk initiative — reactive:frontier-ai-cyber-capabilities
  55. [55] Beyond Autonomous Attacks: The Reality of AI-Enabled Cyber Threats | Strategic Technologies Blog | CSIS — reactive:frontier-ai-cyber-capabilities
  56. [56] Assessing Claude Mythos Preview's cybersecurity capabilities — reactive:frontier-ai-cyber-capabilities
  57. [57] Project Glasswing: Securing critical software for the AI era - Anthropic — reactive:frontier-ai-cyber-capabilities
  58. [58] [PDF] Alignment Risk Update: Claude Mythos Preview - Anthropic — reactive:frontier-ai-cyber-capabilities
  59. [59] Anthropic Claude Mythos Preview - CrowdStrike — reactive:frontier-ai-cyber-capabilities
  60. [60] Why cyber defenders need to be ready for frontier AI | National Cyber Security Centre — reactive:frontier-ai-cyber-capabilities
  61. [61] Frontier AI models and their impact on cyber security | Cyber.gov.au — reactive:frontier-ai-cyber-capabilities
  62. [62] Frontier artificial intelligence - Canadian Centre for Cyber Security — reactive:frontier-ai-cyber-capabilities
  63. [63] Advisory on Risks associated with Frontier AI Models | Cyber Security Agency of Singapore — reactive:frontier-ai-cyber-capabilities
  64. [64] UK Group Says OpenAI's GPT-5.5 is Comparable to Anthropic ... — reactive:frontier-ai-cyber-capabilities
  65. [65] Anthropic's Mythos Has Landed: Here's What Comes Next ... — reactive:frontier-ai-cyber-capabilities
  66. [66] AI models are starting to cross a new line in cybersecurity. UK AISI ... — reactive:frontier-ai-cyber-capabilities
  67. [67] GPT5.5 slightly outperformed Mythos on a multi-step cyber-attack ... — reactive:frontier-ai-cyber-capabilities
  68. [68] GPT-5.5 agora resolve simulações de ataques de rede autonomamente — reactive:frontier-ai-cyber-capabilities (2026-05-01)
  69. [69] 🔍🚨 Evaluación del UK AI Security Institute revela que GPT-5.5 iguala a Claude Mythos en capacidades cibernéticas. — reactive:frontier-ai-cyber-capabilities (2026-05-01)
  70. [70] UK AISI: GPT-5.5 MATCHES MYTHOS ON CYBER TASKS — reactive:frontier-ai-cyber-capabilities (2026-05-01)
  71. [71] → UK AI Security Institute found GPT-5.5 can autonomously solve complex cyber attack scenarios — reactive:frontier-ai-cyber-capabilities (2026-05-01)
  72. [72] Big change in the high-stakes AI race: GPT-5.5 is now almost even with Claude Mythos Preview in cyber-attack simulations... — reactive:frontier-ai-cyber-capabilities (2026-05-01)
  73. [73] GPT-5.5 just matched Claude Mythos on the same cyber benchmark .... two models, two companies, weeks apart. — reactive:frontier-ai-cyber-capabilities (2026-05-01)
  74. [74] GPT-5.5 is on par with Claude Mythos — reactive:frontier-ai-cyber-capabilities
  75. [75] OpenAI's new security model (GPT-5.5-Cyber) is for 'critical ... - Reddit — reactive:frontier-ai-cyber-capabilities
  76. [76] Anthropic's Mythos Claims Questioned by Cybersecurity Insider — reactive:frontier-ai-cyber-capabilities
  77. [77] What is Mythos and why are experts worried about Anthropic's AI ... — reactive:frontier-ai-cyber-capabilities
  78. [78] This is just one eval, but it's an important one — reactive:frontier-ai-cyber-capabilities
  79. [79] GPT-5.5 is OpenAI's best model. It's also the worst at using ... - Tessl — reactive:frontier-ai-cyber-capabilities
  80. [80] OpenAI's new security model is for 'critical cyber defenders' only — reactive:frontier-ai-cyber-capabilities
  81. [81] Sam Altman teases GPT-5.5 Cyber rollout as OpenAI doubles down ... — reactive:frontier-ai-cyber-capabilities
  82. [82] IBM Announces New Cybersecurity Measures to Help Enterprises ... — reactive:frontier-ai-cyber-capabilities
  83. [83] IBM Introduces Autonomous Security to Counter Frontier AI-Driven Cyber Threats — reactive:frontier-ai-cyber-capabilities
  84. [84] 从这张Benchmark看，不是 GPT-5.5 赢了。 — reactive:frontier-ai-cyber-capabilities (2026-04-24)
  85. [85] AISI Evaluates GPT-5.5 Cybersecurity Performance Against Advanced Tasks | Let's Data Science — reactive:frontier-ai-cyber-capabilities
  86. [86] Assessing Claude Mythos Preview's cybersecurity capabilities — reactive:frontier-ai-cyber-capabilities
  87. [87] Anthropic's Mythos AI Model Raises Cybersecurity Alarms : r/Agent_AI — reactive:frontier-ai-cyber-capabilities
  88. [88] Frontier agentic LLMs now enable both industrialized cyberattacks and advanced defensive operations, with Anthropic's Pr... — reactive:frontier-ai-cyber-capabilities (2026-05-01)