Claude Fable 5.1, Anthropic's new frontier model is now available on AWS

Reports

3

Domains carrying it

3

First reported

2 September 2026

Latest report

4 September 2026

◆ Sectors

◆ Timeline

1. 2 September 2026Claude Fable 5.1, Anthropic's new frontier model is now available on AWSaws.amazon.com
2. 4 September 2026Anthropic launches Claude Fable 5.1 and restricted Mythos 5.1 for advanced researchedtechinnovationhub.com
3. 4 September 2026Claude Fable 5.1, GPT-6 Astra, and the New AI Model Stackpatmcguinness.substack.com

◆ Connected developments

Situations Wire finds semantically close to this one. Proximity, not cause.

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• GPT-6 Astra: Frontier intelligence for work, now available in Microsoft Foundry2 reports · 1 domains · 4 September 2026
• Upstage Unveils Solar Open2, Targeting Enterprise AI with 250B Model3 reports · 3 domains · 23 July 2026

◆ Share

◆ Evidence

3 reports · 3 domains

• Claude Fable 5.1, GPT-6 Astra, and the New AI Model Stackpatmcguinness.substack.com · 4 September 2026
• Anthropic launches Claude Fable 5.1 and restricted Mythos 5.1 for advanced researchedtechinnovationhub.com · 4 September 2026
• Claude Fable 5.1, Anthropic's new frontier model is now available on AWSaws.amazon.com · 2 September 2026