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Google: Gemini 3.8 Flash vs Z.ai: GLM 5.3 Flash (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-04.

Google: Gemini 3.8 Flash Z.ai: GLM 5.3 Flash (batch)
Vendorgooglez-ai
Quality Score100100
Benchmark Score93.496.7
Input Price$0.75/M$0.15/M
Output Price$3.75/M$0.50/M
Context Window1,048,5761,048,575
Max Output65,536943,717
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓-
Benchmark Scores
ai_index96.894.8
ai_index_agentic82.596.0
ai_index_coding100.0100.0

Who wins by task?

TaskGoogle: Gemini 3.8 FlashZ.ai: GLM 5.3 Flash (batch)
SQL Generation 173 175
Code Review 169 170
Code Completion 133 133
Code Refactoring 166 166
Bug Fixing 183 186
Unit Test Generation 156 157
Code Documentation 144 145
Regex Writing 137 139
CI/CD Pipelines 146 147
Frontend Component Design 148 149
Data Analysis 173 176
CSV / Spreadsheet Cleanup 154 155
ETL Scripting 156 157
JSON Extraction 148 149
Bulk Data Labeling 134 135
OCR / Document Parsing 147 147
Table Extraction from PDFs 147 147
Long-Document Summarization 162 162
Short-Form Summarization 132 133
Blog Post Writing 142 143

Scores reflect capability match + benchmark data + pricing for each task. Methodology →

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