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GLM-5.1 (Reasoning)

Z AI

Frontier ModelReasoningMit

Analysis of Z AI's GLM-5.1 (Reasoning) and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more.

Context

Release Date
Apr 07, 2026
Window
200k

PricingPer 1M tokens

Input
$1.4
Output
$4.4
Blended 3:1
$2.15

Capabilities

Speed
76 t/s
Input
Output
Reasoning tokens

Latency

TTFT
1.40 ms
500 token response
57.52 s

Benchmarks

Reasoning
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Coding
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GPQA
86.8%
HLE
28.0%
SciCode
43.8%

Analysis of Z AI's GLM-5.1 (Reasoning) and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more.