# GPT-4o vs z-ai/glm-5.3-flash - AI Model Comparison

- Page: https://opencode.ai/data/compare/openai/gpt-4o/zhipu/z-ai-glm-5-3-flash
- Updated: 2026-11-03T21:07:15.000Z

|  | GPT-4o | z-ai/glm-5.3-flash |
| --- | --- | --- |
| Lab | OpenAI | Zhipu |
| Context window | 128K | - |
| Max output | 16K | - |
| Input modalities | text, image, pdf | - |
| Reasoning | No | - |
| Tool calling | Yes | - |
| Open weights | No | - |
| Release date | 2024-05-13 | - |
| Input price per 1M tokens | $2.50 | - |
| Output price per 1M tokens | $10.00 | - |
| Cached input price per 1M tokens | $1.25 | - |
| OpenCode tokens: past 2 months | 100K | 15M |
| Share of all tokens | 0% | 0% |
| Rank by tokens last week | #56 | #51 |
| Unique users | 1 | 6 |
| Weekly retention | - | - |

Model pages: [GPT-4o](https://opencode.ai/data/openai/gpt-4o.md), [z-ai/glm-5.3-flash](https://opencode.ai/data/zhipu/z-ai-glm-5-3-flash.md)

## Methodology

- Updates: Aggregated every hour. Days and weeks use UTC.
- Tokens: Input, output, reasoning, and cached tokens for each request.
- Users and sessions: Approximate counts of distinct users and OpenCode sessions.
- Cost: Session cost is the average cost per OpenCode session. Token prices are list prices from the OpenCode model catalog.
- Retention: The share of a model's users in one week who use it again the next week.
- Citation: Cite OpenCode Data (opencode.ai/data) with the update time shown at the top of the page.