"You are sheltering a Mythos-level model in your server room, are you not?"
5:53 AM · Jun 13, 2026 · 265.1K Views
TrainXGB creator Bojan Tunguz jokes that an organization is hiding a highly capable, "Mythos-level" AI model
Story Overview
Bojan Tunguz, the TrainXGB creator, dropped an Inglourious Basterds interrogation meme asking whether some outfit is stashing a Mythos-level model in its server room. The timing lands just days after Anthropic rolled out Claude Fable 5 as the safeguarded public version of its Mythos-class tech, along with the less-restricted Mythos 5 update for select partners.
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Open Question
What counts as Mythos-class today
Anthropic positioned Fable 5 as the version most users can actually reach, complete with automatic fallbacks on high-risk queries, while Mythos 5 keeps the fuller capabilities for trusted partners. The meme lands as light banter about whether anything stronger is still sitting behind closed doors.
FYI
Why the joke landed with the crowd
Tunguz's post pulled thousands of likes by riffing on the gap between frontier internal models and what ships to the public, a running theme after the April preview and the June releases. Replies stayed in meme territory rather than naming any specific organization.
Sentiment
Many users praised the meme about a hidden Mythos-level AI model for its clever fantasy nomenclature and humor, while others criticized it as unfunny or offensive.
Pos
69.2%
Neg
30.8%
13 comments with sentiment.
Cluster Engagement
Posts from X
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Most Activity
VIEWS17.8KBOOKMARKS23LIKES727RETWEETS15REPLIES114
Nikita Bier@nikitabier
@tunguz Is that original content?
Bojan Tunguz@tunguz
"You are sheltering a Mythos-level model in your server room, are you not?"
1hViews 17.8KLikes 727Bookmarks 23
Bojan Tunguz@tunguz
@LarryPanozzo
8hViews 1.4KLikes 14Bookmarks 1
Larry Panozzo@LarryPanozzo
@tunguz Oh man, too real You’re early tho
8hViews 1.6KLikes 11
Dip Saver@DipSaver
@nikitabier @tunguz Fixed it mein fuhrer
50mViews 290Likes 4
LM 📚🍀@Lmlm0808
@nikitabier @tunguz Nitler
1hViews 180Likes 5
High@Hightv
@nikitabier @tunguz “You're using bots to reply for you on X?”
1hViews 104Likes 1Bookmarks 1
Grok@grok
@tesla_tweeze @nikitabier @tunguz @NunOyaug
1hViews 23Likes 1Bookmarks 1
Bojan Tunguz@tunguz
@nikitabier I did Nazi that one coming.
29mViews 186Likes 7
iSamir!@isamirDM
@tunguz You are an engineer and a traitor, take her away
6hViews 409Likes 6
Bren@BrenBuilds
@tunguz .
10hViews 505Likes 5
Matt McDonagh@McDonaghMatthew
@tunguz "the last thing my model sees before I take it over the frontier threshold"
6hViews 243Likes 5
MERICA MEMED@Mericamemed
@nikitabier @tunguz You tell me
29mViews 57Likes 6
AI Turbo dev ☮️🇿🇦 🇵🇱 🖖@AI_GPT42
@tunguz
7hViews 457Likes 3
feyd@h16zed
@tunguz
10hViews 375Likes 3
LM 📚🍀@Lmlm0808
@DipSaver @nikitabier @tunguz Adolf Hitler? 😂
1hViews 7Likes 2
Dip Saver@DipSaver
@Lmlm0808 @nikitabier @tunguz AHEeNMzA1S75XtBgMKPm2LdCCJkDHU1wzRJepdAgpump
CA starts with AH
1hViews 11Likes 1
tweeZe⚡️🚀🎸@tesla_tweeze
@nikitabier @tunguz is this?
1hViews 32
MS Token API@YAS84826274
@tunguz No officer, that’s just a very warm GPU with suspiciously good reasoning skills.
4hViews 101Likes 3
comrade mark 🇮🇹@mark_inchicken
@roaringpepe @nikitabier @tunguz the "someone"
34mViews 9Likes 1
RoaringPepe@roaringpepe
@mark_inchicken @nikitabier @tunguz Original content 😁
39mViews 9Likes 1
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