Z.AI: GLM 4.6 vs GPT OSS 20B
Compare Z.AI: GLM 4.6 by Zhipu AI against GPT OSS 20B by OpenAI, context windows of 203K vs 131K, tested across 54 shared challenges.
Our Verdict
Z.AI: GLM 4.6
GPT OSS 20BRunner-up
No community votes yet. On paper, Z.AI: GLM 4.6 has the edge — bigger model tier, newer, bigger context window.
GPT OSS 20B is 18x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Z.AI: GLM 4.6
Input
$0.40
Output
$1.75
GPT OSS 20B
Input
$0.02
20× cheaper
Output
$0.10
18× cheaper
GPT OSS 20B is cheaper on both — 20× input, 18× output
Writing DNA
Style Comparison
Similarity
52%
GPT OSS 20B uses 3.6x more transitions
Z.AI: GLM 4.6
GPT OSS 20B
52%Vocabulary54%
14wSentence Length17w
0.29Hedging0.26
5.2Bold5.9
3.2Lists3.3
0.18Emoji0.10
0.57Headings0.75
0.09Transitions0.32
Based on 22 + 21 text responses
Research
What we learned reading every model
FAQ
