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Tue, Nov 10, 2026
Anthropic releases Claude Fable 5.2 and Mythos 5.2
Claude's new 5.2 models are out, with stronger coding and analysis
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What happened?
Anthropic has released new models
- Anthropic (the AI company that makes Claude) released Claude Fable 5.2 and Claude Mythos 5.2.
- They reportedly got better at coding, reasoning through problems, and understanding images.
Good to know first
One model, two names
- Fable and Mythos are the same model underneath.
- Fable has strong safeguards against misuse, so it can be opened to all users.
- Mythos is used by security and life science research groups that apply for access.
What's new?
Faster and cheaper
- It produces answers up to 30% faster than the earlier 5.1.
- The price is also reportedly lower than before.
- It can reportedly check its own work and keep going on hard tasks for hours.
What's new?
What it did during testing
- It helped finish a software migration that engineers had found hard to solve.
- It reportedly designed three electronic devices from scratch.
- It reportedly solved two open problems in black hole physics.
How people reacted
Both excitement and doubt
- Matt Wolfe (who covers AI news on YouTube) shared the news quickly on release day.
- One developer said that after trying it, the models' levels felt evenly matched.
- Others suspected that older models' performance was deliberately lowered.
- Some comments questioned whether the comparison charts were fair.
What changes?
How work may change
- Handing long coding jobs to AI may get easier.
- Security or life science questions may be refused because of the safeguards.
- In that case, you can ask again with another model.
Sources
- S1Claude Fable 5.2 and Mythos 5.2Hacker News | anthropic.com
- S2Introducing Claude Fable 5.2 on AWSAmazon AWS Machine Learning blog | aws.amazon.com
- S3Claude Fable 5.2 Just Dropped. It’s the World’s Best AI.Matt Wolfe | youtube.com
AI wrote this report from public sources and checked it against them. Please see the original articles for exact details.