head-to-head

Z.ai: GLM Flash Latest vs Z.ai: GLM 5.3 Flash

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-19.

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $0.098 at current list prices.

Both read up to 1,048,576 tokens at once, roughly 1,573 pages of text.

Across the 18 tasks where they differ, GLM 5.3 Flash on 18 (SQL Generation, Code Review, Code Completion and others).

Pick GLM 5.3 Flash if you need the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.

Task	Z.ai: GLM Flash Latest	Z.ai: GLM 5.3 Flash
SQL Generation	134	142
Code Review	132	145
Code Completion	132	133
Code Refactoring	136	147
Bug Fixing	136	149
Unit Test Generation	124	132
Code Documentation	132	138
Regex Writing	120	126
CI/CD Pipelines	120	128
Frontend Component Design	122	130
Data Analysis	124	134
CSV / Spreadsheet Cleanup	134	136
ETL Scripting	128	137
OCR / Document Parsing	131	134
Table Extraction from PDFs	131	134
Long-Document Summarization	138	149
Short-Form Summarization	124	127
Blog Post Writing	122	130

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