# Claude Fable 5.2 vs. Fable 5.1: Fewer refusals, with small savings on the login fix

Source: [The New Stack](https://thenewstack.io/claude-fable-5-2-vs-fable-5-1/) · 2026-11-14 · Cloud & DevOps
Page: https://themorning.dev/story/claude-fable-5-2-vs-fable-5-1-fewer-refusals-with-small-savings-on-the-login-fix-ef0117d382100744
Kind: release · Impact: medium

## In brief

- Anthropic says Claude Fable 5.2 has fewer refusals and lower token prices than Fable 5.1.
- Anthropic compared the two models on safeguard blocks, output speed, and API pricing.
- The New Stack's head-to-head coding tests showed the changes playing out very differently, with only small savings on a login fix.

## Why it matters

Developers using Claude Fable models may see different refusal rates, response speed, and API costs after moving from 5.1 to 5.2, and coding results may not match the vendor's claims.

## Versions

- Claude Fable 5.2
- Claude Fable 5.1

## Coverage

- [Claude Fable 5.2 vs. Fable 5.1: Fewer refusals, with small savings on the login fix](https://thenewstack.io/claude-fable-5-2-vs-fable-5-1/) — The New Stack, 2026-11-14

Tags: claude, anthropic, llm, coding, api-pricing

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Dev – https://themorning.dev