{"schema_version":"onlylabs.public_signal.v1","title":"Cloudflare (Workers AI) Writing: Project Glasswing: what Mythos showed us","description":"Cloudflare (Workers AI) writing signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/161b5559-29b3-49c0-a94f-fa56366008c3","json_url":"https://onlylabs.fyi/signals/161b5559-29b3-49c0-a94f-fa56366008c3/signal.json","generated_at":"2026-06-07T21:14:28.030608+00:00","org":{"slug":"cloudflare","name":"Cloudflare (Workers AI)","category":"neocloud","category_label":"Neocloud","dossier_url":"https://onlylabs.fyi/labs/cloudflare","dossier_json_url":"https://onlylabs.fyi/labs/cloudflare/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/161b5559-29b3-49c0-a94f-fa56366008c3","signal_json":"https://onlylabs.fyi/signals/161b5559-29b3-49c0-a94f-fa56366008c3/signal.json","source":"https://blog.cloudflare.com/cyber-frontier-models/","lab_dossier":"https://onlylabs.fyi/labs/cloudflare","lab_dossier_json":"https://onlylabs.fyi/labs/cloudflare/dossier.json","analysis":"https://onlylabs.fyi/analysis/cloudflare","analysis_json":"https://onlylabs.fyi/analysis/cloudflare/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/cloudflare/evidence.json","category":"https://onlylabs.fyi/neoclouds","category_json":"https://onlylabs.fyi/neoclouds.json","category_feed":"https://onlylabs.fyi/neoclouds/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json?category=neocloud","topic":"https://onlylabs.fyi/topics/talking","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json?category=neocloud","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml?category=neocloud","data_business":null},"answer_pack":{"answer":"Cloudflare (Workers AI) published Project Glasswing: what Mythos showed us. 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For the last few months, we've been testing a range of security-focused LLMs on our own infrastructure. These LLMs help identify potential vulnerabilities in our own systems, so we can fix them – and they also show us what attackers are going to be able to do with the latest models. None of these LLMs has captured more attention than Mythos Preview, from Anthropic. A few weeks ago, we were invited to use Mythos Preview as part of Project Glasswing . We soon pointed it at more than fifty of our own repositories – to see what it would find, and to see how it works. This post shares what we observed, what the models did well and what they didn't, and how the architecture and process around them needs to change, so they can be used at scale. What changed with Mythos Preview Mythos Preview is a real step forward, and it's worth saying that plainly before getting into anything else. We've been running models against our code for a while now, and..."},"evidence_pages":[{"url":"https://blog.cloudflare.com/cyber-frontier-models/","final_url":"https://blog.cloudflare.com/cyber-frontier-models/","title":"Project Glasswing: what Mythos showed us","http_status":200,"content_type":"text/html","capture_method":"plain","fetched_at":"2026-06-07T21:14:28.030608+00:00","bytes":334803,"raw_path":"4c9b12981d46eb0accba7c0705f13a7fe32f087ae0dbe0a2e6b6c31dd510950e.html","content_hash":"147aa8db9ebe202069a6724b82dc48705ad29c756dcf7f5ea4cda546447fe317","excerpt_chars":1200,"truncated":true,"excerpt":"Project Glasswing: what Mythos showed us Project Glasswing: what Mythos showed us 2026-05-18 Grant Bourzikas 9 min read This post is also available in 简体中文 , Français , Deutsch , Italiano , 日本語 , 한국어 , Português , Español , Nederlands and 繁體中文 . For the last few months, we've been testing a range of security-focused LLMs on our own infrastructure. These LLMs help identify potential vulnerabilities in our own systems, so we can fix them – and they also show us what attackers are going to be able to do with the latest models. None of these LLMs has captured more attention than Mythos Preview, from Anthropic. A few weeks ago, we were invited to use Mythos Preview as part of Project Glasswing . We soon pointed it at more than fifty of our own repositories – to see what it would find, and to see how it works. This post shares what we observed, what the models did well and what they didn't, and how the architecture and process around them needs to change, so they can be used at scale. What changed with Mythos Preview Mythos Preview is a real step forward, and it's worth saying that plainly before getting into anything else. We've been running models against our code for a while now, and..."}],"related_signals":[{"id":"224fa7ff-e825-4f71-92de-ad4ed336e6e4","url":"https://onlylabs.fyi/signals/224fa7ff-e825-4f71-92de-ad4ed336e6e4","source_url":"https://blog.cloudflare.com/private-origins-dns-routing/","title":"Route public traffic to private applications with Cloudflare","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"cloudflare","name":"Cloudflare (Workers AI)","category":"neocloud"},"occurred_at":"2026-06-10T13:00:00+00:00","first_seen_at":"2026-06-11T07:01:30.73661+00:00","date_source":"rss.item_date"},{"id":"19c1aa86-cbcf-49c0-ba43-9bdb6b848150","url":"https://onlylabs.fyi/signals/19c1aa86-cbcf-49c0-ba43-9bdb6b848150","source_url":"https://blog.cloudflare.com/frontier-model-defense/","title":"Defend against frontier cyber models: Cloudflare's architecture as customer zero","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"cloudflare","name":"Cloudflare (Workers AI)","category":"neocloud"},"occurred_at":"2026-06-09T06:00:00+00:00","first_seen_at":"2026-06-10T07:01:36.764443+00:00","date_source":"rss.item_date"},{"id":"b7c25abb-905a-4512-be1c-728c37aec267","url":"https://onlylabs.fyi/signals/b7c25abb-905a-4512-be1c-728c37aec267","source_url":"https://blog.cloudflare.com/realtime-threat-intel-waf-rules/","title":"Turning Cloudflare’s threat indicators into real-time WAF rules","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"cloudflare","name":"Cloudflare (Workers AI)","category":"neocloud"},"occurred_at":"2026-06-08T13:00:00+00:00","first_seen_at":"2026-06-09T07:00:44.379079+00:00","date_source":"rss.item_date"},{"id":"0a3c44ce-32db-4ae9-b9a5-cdba5188203e","url":"https://onlylabs.fyi/signals/0a3c44ce-32db-4ae9-b9a5-cdba5188203e","source_url":"https://blog.cloudflare.com/ai-gateway-spend-limits/","title":"Your AI bill is out of control. 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