# GLM 5.3 Prime: AI model fact sheet

- **Provider:** z-ai
- **Released:** 2026-09-23
- **Context window:** 1,000,000 tokens
- **API pricing:** $2.80 / 1M input, $8.80 / 1M output
- **OpenRouter ID:** z-ai/glm-5.3-prime
- **Capabilities:** conversation, reasoning, analysis, code-generation, tool-use

A faster serving variant of GLM 5.3 with the same capabilities. It accepts text, supports tool calling and reasoning, and provides a one-million-token context.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/glm-5.3-prime