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Z.ai: GLM 5.3 Flash (batch) vs ByteDance Seed: Seed-2.0-Code

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

Z.ai: GLM 5.3 Flash (batch) ByteDance Seed: Seed-2.0-Code
Vendorz-aibytedance-seed
Quality Score100100
Benchmark Score96.7-
Input Price$0.15/M$0.50/M
Output Price$0.50/M$3.00/M
Context Window1,048,575262,144
Max Output943,717131,072
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index94.8-
ai_index_agentic96.0-
ai_index_coding100.0-

Who wins by task?

TaskZ.ai: GLM 5.3 Flash (batch)ByteDance Seed: Seed-2.0-Code
SQL Generation 175 130
Code Review 170 126
Code Completion 133 128
Code Refactoring 166 127
Bug Fixing 186 130
Unit Test Generation 157 121
Code Documentation 145 125
Regex Writing 139 119
CI/CD Pipelines 147 117
Frontend Component Design 149 122
Data Analysis 176 124
CSV / Spreadsheet Cleanup 155 128
ETL Scripting 157 122
JSON Extraction 149 131
Bulk Data Labeling 135 128
OCR / Document Parsing 147 128
Table Extraction from PDFs 147 128
Long-Document Summarization 162 129
Short-Form Summarization 133 123
Blog Post Writing 143 118

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

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