What is the difference between Claude Fable 5.1 and GLM 5 Turbo?

Claude Fable 5.1 is developed by Anthropic while GLM 5 Turbo is developed by Z.ai. Claude Fable 5.1 has a 1.0M token context window vs GLM 5 Turbo's 203K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5.1 or GLM 5 Turbo?

It depends on your use case. Claude Fable 5.1 and GLM 5 Turbo each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does Claude Fable 5.1 cost compared to GLM 5 Turbo?

Claude Fable 5.1 costs $10/M input tokens and GLM 5 Turbo costs $0.96/M input tokens. GLM 5 Turbo is $9.04/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Fable 5.1 and GLM 5 Turbo on Rival?

This page shows a side-by-side comparison of Claude Fable 5.1 and GLM 5 Turbo across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Sep 2026

Claude Fable 5.1vsGLM 5 Turbo

GLM 5 Turbo is cheaper than Claude Fable 5.1 at $0.96/M vs $10/M input tokens.

Claude Fable 5.1 and GLM 5 Turbo compared across 10 shared prompts
Spec	Claude Fable 5.1	GLM 5 Turbo
Input price	$10/M tokens	$0.96/M tokens
Output price	$50/M tokens	$3.2/M tokens
Context window	1.0M tokens	203K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Sep 2026	Mar 2026

Our Verdict

Claude Fable 5.1

GLM 5 TurboRunner-up

Not enough votes to call it. On the specs, Claude Fable 5.1 has the edge: bigger model tier, newer, bigger context window, major provider backing.

GLM 5 Turbo costs 16x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Fable 5.1

Input

$10.00

Output

$50.00

GLM 5 Turbo

Input

$0.96

10× cheaper

Output

$3.20

16× cheaper

GLM 5 Turbo is cheaper on both: 10× input, 16× output.

Where to run it

5 hosts

Claude Fable 5.14 hosts

HostInOutContextUptime

Amazon Bedrock$10.00 in$50.00 out1M—Anthropic$10.00 in$50.00 out1M99.7% up Azure AI Foundry$10.00 in$50.00 out1M99.7% up Google Vertex AI$10.00 in$50.00 out1M99.7% up

GLM 5 Turbo1 host

HostInOutContextUptime

Z.ai$1.20 in$4.00 out203k100% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Cost per 1M tokens

5 hosts

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and GLM 5 Turbo?

Which is better, Claude Fable 5.1 or GLM 5 Turbo?

How much does Claude Fable 5.1 cost compared to GLM 5 Turbo?

How can I compare Claude Fable 5.1 and GLM 5 Turbo on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

5 hosts

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and GLM 5 Turbo?

Which is better, Claude Fable 5.1 or GLM 5 Turbo?

How much does Claude Fable 5.1 cost compared to GLM 5 Turbo?

How can I compare Claude Fable 5.1 and GLM 5 Turbo on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages