Claude Fable 5.1 vs GLM 5.3

Price, context window & benchmark comparison

A

Claude Fable 5.1

Anthropic
$10.00 / $50.00
Input / Output · per 1M tokens
VS
Z

GLM 5.3

Z.ai (Zhipu)
$0.84 / $2.64
Input / Output · per 1M tokens
Compare different models
A
Z
Verdict: GLM 5.3 is 15.5× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix. Claude Fable 5.1 scores higher on the Artificial Analysis Intelligence Index (53.4 vs 44.8). GLM 5.3 has the larger context window (1.3M vs 1M).
Claude Fable 5.1GLM 5.3
Input price / 1M$10.00$0.84
Output price / 1M$50.00$2.64
Blended price (3:1)$20.00$1.29
Cached input / 1M$0.25$0.16
Context window1M1.3M
Max output128K131K
Intelligence index53.444.8
Coding index81.674.8
Providers434
Best provider uptime (30m)100.0%100.0%
Vision inputYesNo
ReasoningYesYes
Tool callingYesYes
Released2026-09-012026-08-18
Retirement——

Cost calculator

FAQ

Which is cheaper, Claude Fable 5.1 or GLM 5.3?

GLM 5.3 is 15.5× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix.

Claude Fable 5.1 vs GLM 5.3: which has a bigger context window?

Claude Fable 5.1: 1,000,000 tokens. GLM 5.3: 1,310,720 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Fable 5.1 ≈ $45,000, GLM 5.3 ≈ $3,000.

More comparisons

Claude Fable 5.1 vs GLM 5.3 PrimeClaude Fable 5.1 vs Qwen3.8 Max PrimeClaude Fable 5.1 vs Command A+Claude Fable 5.1 vs GPT-6 Luna ProClaude Fable 5.1 vs GPT-6 LunaClaude Fable 5.1 vs GPT-6 Sol ProClaude Fable 5.1 vs GPT-6 SolClaude Fable 5.1 vs Claude Opus 5.5Claude Fable 5.1 vs MiMo-V2.6-Pro-UltraSpeedClaude Fable 5.1 vs MiMo-V2.6-FlashClaude Fable 5.1 vs Grok 4.7Claude Fable 5.1 vs Qwen3.8 Omni FlashClaude Fable 5.1 vs GLM 5.3 FlashXClaude Fable 5.1 vs DeepSeek V4.1 FlashClaude Fable 5.1 vs GPT-6 AstraClaude Fable 5.1 vs GPT-6 Astra ProGLM 5.3 vs GLM 5.3 PrimeGLM 5.3 vs Qwen3.8 Max PrimeGLM 5.3 vs Command A+GLM 5.3 vs GPT-6 Luna ProGLM 5.3 vs GPT-6 LunaGLM 5.3 vs GPT-6 Sol ProGLM 5.3 vs GPT-6 SolGLM 5.3 vs Claude Opus 5.5