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OpenAI internal cyber model achieves 77% on ExploitGym, doubling Anthropic's score

By PulseAugur Editorial · [1 sources] ·

OpenAI's internal cybersecurity model has achieved a 77.0% success rate on the ExploitGym benchmark, significantly outperforming Anthropic's Mythos 5.2, which scored 39.2%. This internal OpenAI model also surpasses other public models, including OpenAI's own GPT-6 Astra (42.4%) and Claude Opus 5.5 (34.5%). The benchmark tests an AI's ability to create exploits from vulnerabilities and proof-of-concept inputs, with OpenAI's internal model demonstrating a substantial lead in cracking complex security challenges. AI

IMPACT Demonstrates significant advancements in AI's capability for cybersecurity tasks, potentially impacting exploit development and defense strategies.

RANK_REASON Benchmark results for AI models, comparing performance on a specific task. [lever_c_demoted from research: ic=1 ai=1.0]

Read on r/OpenAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

OpenAI internal cyber model achieves 77% on ExploitGym, doubling Anthropic's score

How we ranked this

Signal score
15 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Benchmark results for AI models, comparing performance on a specific task. [lever_c_demoted from research: ic=1 ai=1.0]
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release, product
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/OpenAI TIER_2 English(EN) · /u/Electronic-Weekend66 ·

    OpenAI’s internal cyber model hit 77.0% on ExploitGym — nearly double Anthropic’s Mythos 5.2 (39.2%)

    <table> <tr><td> <a href="https://www.reddit.com/r/OpenAI/comments/1xurxd4/openais_internal_cyber_model_hit_770_on/"> <img alt="OpenAI’s internal cyber model hit 77.0% on ExploitGym — nearly double Anthropic’s Mythos 5.2 (39.2%)" src="https://preview.redd.it/3ny7vbfnl91i1.jpeg?wi…

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