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Google: Gemini 3.5 Flash vs Z.ai: GLM 5.1

Summary

Gemini 3.5 Flash vs GLM 5.1 benchmark comparison: Gemini 3.5 Flash leads on average score with 9.8 vs 5.6. GLM 5.1 has the lower benchmark cost at $0.063 vs $1.115. GLM 5.1 is faster at 4.10s vs 8.84s, with pass rates of 96.8% vs 41.3%.

Recommended model: Gemini 3.5 Flash - It has the strongest score in this comparison (9.8) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-02

Metric Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19 GLM 5.1 GLM 5.1 none Release: 2026-04-07
Score 9.8 5.6
Rank #1 #120
Reliability 10.0 10.0
Consistency 9.6 8.5
Tests Correct
Attempt pass rate 96.8% 41.3%
Flaky tests 1 4
Total Runs 63 63
Cost per result 5.575 0.843
Total Cost $1.115 $0.063
Input Price $1.500 / 1M $0.975 / 1M
Output Price $9.000 / 1M $4.301 / 1M
Total Input Tokens 37,594 47,133
Output Tokens 1,975 3,754
Reasoning Tokens 115,638 0
Response Time (avg) 8.84s 4.10s
Response Time (max) 34.82s 32.57s
Response Time (total) 185.57s 86.18s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#1 Gemini 3.5 Flash

high
Cost
$0.208
Time
118.2s
Tokens
23,158 tok

#120 GLM 5.1

none
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.57s 492 174 4,997
GLM 5.1 4.0 6.3 25.0% 2 2.11s 555 305 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.96s 8,118 456 47,129
GLM 5.1 3.9 9.7 0.0% 0 4.96s 7,256 525 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.37s 12,873 351 16,323
GLM 5.1 2.8 2.1 33.3% 1 32.57s 22,831 2,129 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 6.43s 7,548 279 8,466
GLM 5.1 10.0 10.0 100.0% 0 1.08s 7,107 204 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 7.6 7.2 77.8% 1 14.09s 633 12 24,721
GLM 5.1 2.9 7.2 11.1% 1 1.99s 687 24 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.63s 486 115 1,650
GLM 5.1 5.0 10.0 0.0% 0 790ms 477 39 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.35s 615 70 3,799
GLM 5.1 9.8 10.0 100.0% 0 1.98s 636 66 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.23s 558 241 4,940
GLM 5.1 7.7 10.0 66.7% 0 1.45s 609 151 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 9.8 10.0 100.0% 0 4.96s 6,115 265 1,608
GLM 5.1 10.0 10.0 100.0% 0 10.68s 6,789 300 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.94s 156 12 2,005
GLM 5.1 3.0 10.0 0.0% 0 2.34s 186 11 0

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