Z.ai: GLM 5.3 FlashX vs Nex AGI: Nex-N2.5-Pro
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-13.
| Z.ai: GLM 5.3 FlashX | Nex AGI: Nex-N2.5-Pro | |
|---|---|---|
| Vendor | z-ai | nex-agi |
| Quality Score | 100 | 100 |
| Input Price | $0.37/M | $0.07/M |
| Output Price | $1.25/M | $0.25/M |
| Context Window | 1,048,576 | 262,144 |
| Max Output | 131,072 | 235,929 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Nex-N2.5-Pro costs $0.14 and GLM 5.3 FlashX costs $0.68, so Nex-N2.5-Pro is about 5.0 times cheaper for the same work.
GLM 5.3 FlashX reads up to 1,048,576 tokens at once, roughly 1,573 pages of text, against about 393 pages for Nex-N2.5-Pro.
Only GLM 5.3 FlashX offers video input.
Across the 18 tasks where they differ, GLM 5.3 FlashX scores higher on 14 (SQL Generation, Code Review, Code Completion and others), Nex-N2.5-Pro on 4 (Regex Writing, JSON Extraction, Bulk Data Labeling and others).
Pick GLM 5.3 FlashX if you need long documents, video input or the stronger all-round task scores; pick Nex-N2.5-Pro if you need lower cost.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | Z.ai: GLM 5.3 FlashX | Nex AGI: Nex-N2.5-Pro |
|---|---|---|
| SQL Generation | 133 | 131 |
| Code Review | 132 | 126 |
| Code Completion | 131 | 129 |
| Code Refactoring | 136 | 127 |
| Bug Fixing | 136 | 130 |
| Unit Test Generation | 124 | 121 |
| Code Documentation | 131 | 126 |
| Regex Writing | 119 | 119 |
| CI/CD Pipelines | 120 | 117 |
| CSV / Spreadsheet Cleanup | 133 | 128 |
| ETL Scripting | 128 | 122 |
| JSON Extraction | 131 | 131 |
| Bulk Data Labeling | 129 | 129 |
| OCR / Document Parsing | 131 | 128 |
| Table Extraction from PDFs | 131 | 128 |
| Long-Document Summarization | 137 | 129 |
| Short-Form Summarization | 123 | 123 |
| Blog Post Writing | 121 | 119 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →