How did Anthropic Claude Fable 5.1 and Mythos 5.1 do on X?
Anthropic posted the Claude Fable 5.1 and Mythos 5.1 launch from @claudeai on Sep 1, 2026. The post has 21,142,639 views, 65,191 likes, 7,259 reposts, 4,817 quotes and 2,855 replies, an engagement rate of 0.38%. It ranks #45 of the 2839 launches Gridd tracks.
We’re introducing Claude Fable 5.1 and Claude Mythos 5.1. They're the world’s most advanced models for coding and knowledge work.
- 121xthe median launch175K median views
- #45of the launches we trackout of 2839
- 10xits own following2,081,168 followers
- Views
- 21.1M
- Likes
- 65.2K
- Reposts
- 7.3K
- Quotes
- 4.8K
- Replies
- 2.9K
- Bookmarks
- 9.4K
What would these views cost to buy?
At $100 per 1,000 views, the rate a brand pays an agency charging $100K for one million views, 21.1M views would cost $2.1M. At Gridd's rate of about $25 per 1,000 views, the same views would cost about $529K.
The post reached about 10 views for every follower of @claudeai.
What launched?
Anthropic launched Claude Fable 5.1 and Claude Mythos 5.1, which it described as the most advanced models for coding and knowledge work.
How does it compare with other launches?
Anthropic Claude Fable 5.1 and Mythos 5.1 has more views than 98% of the 2839 launches Gridd tracks: 121x the median launch's 175K views.
- Anthropic Claude Fable 5.1 and Mythos 5.121.1M
- Median tracked launch175K
- #1: xAI Voice Cloning204M
| Metric | Anthropic Claude Fable 5.1 and Mythos 5.1 | Median launch |
|---|---|---|
| Views | 21.1M | 175K |
| Engagement rate | 0.38% | 0.48% |
| Views per follower | 10 | 2.8 |
| Quote posts | 4.8K | 27 |
| Saves per 10K views | 4.5 | 14.2 |
Other Anthropic launches we track: Anthropic Computer use in Claude Cowork (78.4M views), Anthropic Claude Design (64.6M views), Anthropic Claude Fable 5 (57.7M views), Anthropic Cowork (49.9M views), Anthropic Claude Opus 5.5 (29.7M views), Anthropic Claude Code Security (26.3M views). All 31 Anthropic launches, or every ai launch.
Against launches like it
A launch only means something against comparable ones. These are the groups it belongs to, and where it sits in each.
| Compared with | Launches | Median views | This one | Rank |
|---|---|---|---|---|
| AI launches | 1,462 | 264.5K | 80x | #34 |
| Accounts over 1M followers | 224 | 2.2M | 9.4x | #27 |
| Video launch posts | 1,940 | 192.5K | 110x | #38 |
| Every launch | 2,839 | 175K | 121x | #45 |
What this launch shows
From an account with 2.1M followers, the post reached 10 times the account's following. Launches from accounts over 1M followers reach a median of 0.5 times their following, so this one went about 19 times further than usual for its size. It ranks 27 of 224 launches from accounts that size.
It drew 4,817 quote posts, 2.3 per 10,000 views against a median of 1.7. More people than usual added their own take, and a quote post is what carries a launch to audiences the account does not have.
The first line is "We’re introducing Claude Fable 5.1 and Claude Mythos 5.1.". The post runs 20 words, against a median of 39 for launch posts here, and leads with a video: video launches have a median of 192.5K views, against 137.6K for the rest.
There is no link in the post. Launch posts without a link have a median of 184.9K views in the tracker.
It went out on a Tuesday (UTC). Tuesday launches have a median of 192.3K views, the strongest day in the tracker.
Every comparison is against the 2839 launches in the tracker, read on Nov 14, 2026. Medians, not averages. See the state of launches on X for the full breakdown.
Questions about this launch
- What is Anthropic?
- In its own words on X: "Claude is an AI assistant built by @anthropicai to be safe, accurate, and secure. Talk to Claude on or download the app." Anthropic posted the Claude Fable 5.1 and Mythos 5.1 launch from @claudeai on Sep 1, 2026.
- How many views did Anthropic Claude Fable 5.1 and Mythos 5.1 get on X?
- 21,142,639 views. Anthropic posted it from @claudeai on Sep 1, 2026, and the post has 65,191 likes, 7,259 reposts, 4,817 quotes, 2,855 replies and 9,418 bookmarks. Gridd re-reads these numbers from the post every six hours; these were read on Nov 14, 2026.
- Was Anthropic Claude Fable 5.1 and Mythos 5.1 a big launch on X?
- It ranks #45 of the 2839 launches Gridd tracks, with more views than 98% of them and 121x the median launch's 175K views. Its engagement rate is 0.38%, against a median of 0.48%.
- What would 21.1M views on X cost to buy?
- At $100 per 1,000 views, the rate a brand pays an agency charging $100K for one million views, 21.1M views would cost $2.1M. At Gridd's rate of about $25 per 1,000 views, the same views would cost about $529K.
Source: Gridd launch tracker, gridd.agency/launches/anthropic-claude-fable-5-1-and-mythos-5-1, read from the post on X on Nov 14, 2026. Free to cite with a link (CC BY 4.0). Get every launch as JSON.