GLM-4.5-Flash
Summary
GLM-4.5-Flash is an open-weight language model from Zhipu AI (Z.ai), released on 28 Jul 2025. It accepts text and generates text, with a 131K-token context window and up to 98K output tokens per response.
Efficient GLM model for fast reasoning, coding, and agent workflows
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Zhipu AI (Z.ai) |
|---|---|
| Release date | 28 Jul 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [models.dev] |
| Context window | 131K (131,072 tokens) [models.dev] |
| Max output | 98K tokens [models.dev] |
| Knowledge cutoff | Apr 2025 [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
GLM-4.5-Flash API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Z.ai API glm-4.5-flash | Free | Free | Free | 131K | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of GLM-4.5-Flash?
GLM-4.5-Flash has a context window of 131,072 tokens (131K) and can generate up to 98,304 tokens in a single response, according to models.dev.
Is GLM-4.5-Flash open source?
GLM-4.5-Flash is an open-weight model. Check the license terms before commercial use.
When was GLM-4.5-Flash released?
Zhipu AI (Z.ai) released GLM-4.5-Flash on 28 Jul 2025, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.