# The Verge — Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work

- Company: The Verge (theverge.com)
- Announced: 2026-09-01T22:01:36+00:00
- Category: model-update
- Coverage: 4 outlets
- Announcement: yes
- Group: models
- Source: https://www.theverge.com/ai-artificial-intelligence/987830/anthropic-claude-fable-mythos-5-1
- Record: https://forck.live/items/7293-anthropic-launches-claude-fable-5-1-and-says-it-s-up-to-45-percent-cheaper-for
- Subject: Reporting
- Models affected: Fable 5.1, Mythos 5.1
- Pricing: costs around 25 percent less typically and up to 45 percent less for complex agentic tasks

[Anthropic](https://anthropic.com/claude-fable-and-mythos-5-1) launched Claude Fable 5.1 and Mythos 5.1, addressing criticisms about price, data retention, and safeguards. Fable 5.1 offers stronger performance than its predecessor and is up to 45% cheaper for complex agentic tasks due to reduced pricing on cached data. It also has more precise safeguards and is now available on all platforms, while Mythos 5.1 is available only to Project Glasswing participants.

## Evidence

Verbatim from https://www.theverge.com/ai-artificial-intelligence/987830/anthropic-claude-fable-mythos-5-1:

> Anthropic says its newest AI models, Fable 5.1 and Mythos 5.1 , address criticisms from customers about price, data retention, and overzealous safeguards. The company claims Claude Fable 5.1 offers stronger performance than Fable 5, but costs around 25 percent less typically and up to 45 percent less for complex agentic tasks, thanks to reduced pricing on cached data that was already processed and stored.

## Around this story

Outlets this record can name and link:

- Moneycontrol — Anthropic launches Claude Fable 5.1 and Mythos 5.1 with improved coding, research capabilities and lower pricing: https://moneycontrol.com/technology/anthropic-launches-claude-fable-5-1-and-mythos-5-1-with-improved-coding-research-capabilities-and-lower-pricing-article-14020859.html
- Silicon Republic — Anthropic launches Claude Fable 5.1 and Mythos 5.1: https://siliconrepublic.com/machines/anthropic-launches-claude-fable-5-1-and-mythos-5-1
- The Deep View — In Fable 5.1, AI's cost war comes for Anthropic: https://thedeepview.com/articles/in-fable-5-1-ai-s-cost-war-comes-for-anthropic
- Anthropic: https://anthropic.com/claude-fable-and-mythos-5-1

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