GLM 5.3 Prime
Summary
GLM 5.3 Prime is a language model from Zhipu AI (Z.ai), released on 23 Sept 2026. It accepts text and generates text, with a 1M-token context window and up to 131K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $2.80 per million input tokens and $8.80 per million output tokens (OpenRouter), across 1 provider we track.
GLM-5.3-Prime is the high-speed variant of Z.ai's GLM-5.3, inheriting its full capabilities while delivering 1.5–2× the output throughput through inference acceleration. It supports text input and output with a 1M-token...
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Zhipu AI (Z.ai) |
|---|---|
| Release date | 23 Sept 2026 [OpenRouter] |
| Status | Generally available |
| Context window | 1M (1,000,000 tokens) [OpenRouter] |
| Max output | 131K tokens [OpenRouter] |
| Input | Text [OpenRouter] |
| Output | Text [OpenRouter] |
| Reasoning mode | Yes [OpenRouter] |
| Tool calling | Yes [OpenRouter] |
| Structured output | No [OpenRouter] |
GLM 5.3 Prime API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter z-ai/glm-5.3-prime | $2.80 | $8.80 | $0.56 | 1M | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of GLM 5.3 Prime?
GLM 5.3 Prime has a context window of 1,000,000 tokens (1M) and can generate up to 131,072 tokens in a single response, according to OpenRouter.
How much does the GLM 5.3 Prime API cost?
GLM 5.3 Prime is listed from $2.80 per million input tokens and $8.80 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
When was GLM 5.3 Prime released?
Zhipu AI (Z.ai) released GLM 5.3 Prime on 23 Sept 2026, according to OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.