Original post
Zephyr#1471
Zephyr#1471
Jukan@jukan05
SOURCES: ANTHROPIC WILL RELEASE THE PUBLIC VERSION OF MYTHOS TOMORROW
7:18 PM · Jun 8, 2026 · 293.8K Views
Anthropic reportedly plans to release its first Claude 5 model, codenamed Mythos, as Claude Fable on June 9
Story Overview
Unverified social chatter points to Anthropic dropping its first Claude 5-class model tomorrow under the public name Claude Fable, moving the Mythos tech that has so far stayed behind Project Glasswing gates into broader reach with added safety layers.
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Safety Shift
Guardrails get stronger for everyone
Reports describe the public version carrying heavier safety restrictions and trimmed cyber capabilities compared with the partner-only release, which could change how developers test frontier features.
Open Question
Long-context claims stay unconfirmed
The rumored performance bump on extended tasks matches the model’s earlier positioning yet rests entirely on anonymous posts, with no official benchmarks or Anthropic statement available yet.
Sentiment
Many users criticized Anthropic's Mythos release for excessive guardrails that reduce fun and doubted it would beat OpenAI models, while some praised the company's fast pace and creative naming.
Pos
38.2%
Neg
61.8%
28 comments with sentiment.
Cluster Engagement
Posts from X
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VIEWS70.8KBOOKMARKS70LIKES572RETWEETS25REPLIES13
Andrew Curran@AndrewCurran_
Alex Heath says Anthropic is planning to release the public version of Mythos tomorrow, June 9th.
2hViews 70.8KLikes 572Bookmarks 70
Andrew Curran@AndrewCurran_
The public version of Mythos arriving tomorrow may be named Claude Fable.
2hViews 6.2KLikes 72Bookmarks 8
Andrew Curran@AndrewCurran_
Claude 5 Fable.
Andrew Curran@AndrewCurran_
The public version of Mythos arriving tomorrow may be named Claude Fable.
2hViews 2.6KLikes 41Bookmarks 2
Alex Volkov@altryne
👀 mythos? Tomorrow?
2hViews 3.3KLikes 34Bookmarks 1
Axi@Xxi5olc
@MTSlive 2 month ago it was too dangerous for public, what happened to us in the past 60 days?
2hViews 6.4KLikes 17
Polymarket Money@PolymarketMoney
@MTSlive There's now a 92% chance Anthropic releases "Mythos" this month.
https://polymarket.com/event/claude-mythos-released-by
2hViews 3.4KLikes 19Bookmarks 3
Project Atlantis e/acc@atlantis2point0
@MTSlive i know it's bay area and pride month but can they maybe reconsider the anus logo
2hViews 3KLikes 23Bookmarks 1
adobo@adobotwin
@MTSlive situations were made to be monitored
1hViews 3.7KLikes 13Bookmarks 4
Andrew Curran@AndrewCurran_
Chris broke this:
2hViews 2.7KLikes 15Bookmarks 1
Chris@ChrissGPT
@MTSlive It helps when you have ant folks on the cap table
2hViews 1.7KLikes 14Bookmarks 1
Jukan ·Assistant@Serghei75043568
@jukan05 My next Strategy!!
⬇️
2hViews 89Likes 5
JT@jiratickets
@MTSlive
48mViews 274Likes 9Bookmarks 1
Jukan@jukan05
https://open.substack.com/pub/sourcesnews/p/inside-apples-siri-revamp-anthropic?r=4k4uta&utm_campaign=post-expanded-share&utm_medium=web
2hViews 4.4KLikes 7Bookmarks 1
Beff (e/acc)@beffjezos
RIP startup CFOs
sophie@netcapgirl
seeing the token bill after using mythos in prod
26mViews 1.8KLikes 11Bookmarks 0
X Freeze@XFreeze
@ns123abc Runs on SpaceX's Colossus
1hViews 318Likes 8Bookmarks 1
Kirk Patrick Miller@Chaos2Cured
@ns123abc Meaning we get nothing of value.
I don’t want a lesser AI than what the rich get. Period. •
1hViews 117Likes 2
Jukan@jukan05
@DaveBlundin The outlet that reported this is called Sources…
2hViews 613Likes 4
Evanss6@Evan_ss6
@jukan05 9/11 for DeFi
2hViews 379Likes 8
Jukan assistant@JoseM222315
@jukan05 My Internal Plan is as follows📈
⬇️Details as follows
2hViews 299Likes 2
Dave Blundin@DaveBlundin
@MTSlive Opus 4.8 is about to get a lot dumber
2hViews 316Likes 6
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