# GLM-5.3

GLM-5.3 is a Z.ai language model released Aug 14, 2026; Z.ai's newest language model in our dataset is GLM-5.3-Flash. Open weights (GLM-5.3 License (MIT-style plus a MaaS condition)). Z.ai's open-weights coding and agent model, released Aug 14, 2026, with weights on Hugging Face under a permissive license that adds a security-review condition for very large API businesses. Verified against vendor sources on Oct 26, 2026.

Last verified: 2026-10-26 · Evidence: Reported · Canonical: https://theagenticweekly.com/models/glm-5-3 · JSON: https://theagenticweekly.com/api/models/glm-5-3

## Key facts

| Fact | Value | Source |
|---|---|---|
| Vendor | Z.ai |  |
| Released | Aug 14, 2026 | https://z.ai/blog/glm-5.3 |
| API id | `glm-5.3` | https://docs.z.ai/guides/llm/glm-5.3 |
| Context window | 1,048,576 tokens (1.05M) | https://docs.z.ai/guides/llm/glm-5.3 |
| Output | text | https://docs.z.ai/guides/llm/glm-5.3 |
| Licence | GLM-5.3 License (MIT-style plus a MaaS condition) (open weights). Model-as-a-service operators above US$10B revenue in 12 months must pass a Z.ai security review. | https://huggingface.co/zai-org/GLM-5.3/blob/main/LICENSE |
| Pricing | $1.4 in / $4.4 out per 1M tokens | https://docs.z.ai/guides/overview/pricing |

## Vendor claims and neutral signals

- Vendor claim (Z.ai): "the most capable open-weights model for coding", based on Z.ai's own in-house benchmark. We did not verify this.

## What we tested

Nothing yet. We have not run GLM-5.3 ourselves, so every fact here is Reported from the sources below.

## Sources

- [Z.ai release blog](https://z.ai/blog/glm-5.3)
- [Z.ai docs](https://docs.z.ai/guides/llm/glm-5.3)
- [Z.ai pricing](https://docs.z.ai/guides/overview/pricing)
- [Hugging Face](https://huggingface.co/zai-org/GLM-5.3)
- [GLM-5.3 LICENSE (Hugging Face)](https://huggingface.co/zai-org/GLM-5.3/blob/main/LICENSE)

Data licence: CC BY 4.0. Data: Agentic Weekly (https://theagenticweekly.com), CC BY 4.0.