Claude Fable 5.1vsGLM 5.1
GLM 5.1 is cheaper than Claude Fable 5.1 at $1.4/M vs $10/M input tokens.
| Spec | Claude Fable 5.1 | GLM 5.1 |
|---|---|---|
| Input price | $10/M tokens | $1.4/M tokens |
| Output price | $50/M tokens | $4.4/M tokens |
| Context window | 1.0M tokens | 203K tokens |
| Weights | Closed | Open |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | Apr 2026 |
Our Verdict
Claude Fable 5.1
GLM 5.1Runner-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 5.1 costs 11x 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 5.1
Input
$1.40
7.1× cheaper
Output
$4.40
11× cheaper
GLM 5.1 is cheaper on both: 7.1× input, 11× output.
Where to run it
18 hosts, cheapest first
GLM 5.114 hosts
StreamLakefp8$0.97 in$3.04 out200k99.6% upDeepInfrafp4$1.05 in$3.50 out203k99.9% upSiliconFlowfp8$1.19 in$3.74 out205k98.3% upAtlasCloudfp8$1.26 in$3.96 out203k99.7% upAlibaba Cloudfp8$1.33 in$4.18 out203k100% upNovitafp8$1.38 in$4.40 out205k99.9% up
8 more hostsFewer hosts
Baidu Qianfanfp8$1.40 in$4.40 out203k99.9% upFriendli$1.40 in$4.40 out203k100% upGMI Cloudfp8$1.40 in$4.40 out203k99.5% upNebiusfp8$1.40 in$4.40 out203k96.2% upZ.aifp8$1.40 in$4.40 out203k99.6% upVenicefp8$1.40 in$4.40 out200k91.7% upChutesfp8degraded$0.98 in$3.08 out203k84% upPhaladegraded$1.21 in$4.20 out203k80% up
Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.
Research
What we learned reading every model
FAQ
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