Gemini 2.5 Pro Preview 06-05 vs Z.ai: GLM 5.1
Compare Gemini 2.5 Pro Preview 06-05 by Google AI against Z.ai: GLM 5.1 by Z-ai, context windows of 1.0M vs 203K, tested across 43 shared challenges.
Our Verdict
Gemini 2.5 Pro Preview 06-05
Z.ai: GLM 5.1Runner-up
No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 has the edge — bigger model tier, bigger context window, major provider backing.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Pro Preview 06-05
Input
$1.25
1.1× cheaper
Output
$10.00
Z.ai: GLM 5.1
Input
$1.40
Output
$4.40
2.3× cheaper
Gemini 2.5 Pro Preview 06-05 wins input (1.1× cheaper)·Z.ai: GLM 5.1 wins output (2.3× cheaper)
Writing DNA
Style Comparison
Similarity
63%
Gemini 2.5 Pro Preview 06-05 uses 2.3x more headings
Gemini 2.5 Pro Preview 06-05
Z.ai: GLM 5.1
51%Vocabulary54%
15wSentence Length18w
0.31Hedging0.31
4.8Bold3.6
4.1Lists2.6
0.00Emoji0.00
0.98Headings0.43
0.05Transitions0.11
Based on 20 + 27 text responses
Research
What we learned reading every model
FAQ
