---
title: "glm-5.3-flash - Model Details & Comparison"
description: "glm-5.3-flash from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models."
url: "https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/glm-5.3-flash"
markdown: "https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/glm-5.3-flash.md"
---

# glm-5.3-flash - Model Details & Comparison

> glm-5.3-flash from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models.

## Important Links

- [View MCP Gateway](https://www.getmaxim.ai/bifrost/resources/mcp-gateway.md)
- [Features](https://www.getmaxim.ai/bifrost/#features)
- [Enterprise](https://www.getmaxim.ai/enterprise)
- [Pricing](https://www.getmaxim.ai/pricing)
- [Docs](https://docs.getbifrost.ai)
- [GitHub](https://github.com/maximhq/bifrost)
- [Book a Demo](https://www.getmaxim.ai/book-a-demo)

## About glm-5.3-flash

glm-5.3-flash is a chat model from OpenRouter, one of 468 chat models they offer. It is priced at $0.09 per 1M input tokens and $0.30 per 1M output tokens, ranking 378 out of 3648 chat models by cost and cheaper than 89% of models in this category. glm-5.3-flash supports vision, function calling, reasoning, prompt caching, structured output. Its 1,049K-token context window is in the top 11% among chat models.

## Specifications

- **OpenRouter Provider.**
- **Chat Mode.**
- **1,048,576 Max Input Tokens.**
- **131,072 Max Output Tokens.**
- **131,072 Max Tokens.**
- **$0.09 / 1M tokens Input Price.**
- **$0.30 / 1M tokens Output Price.**

## Capabilities

glm-5.3-flash supports: Function Calling, Vision, Reasoning, Prompt Caching, Response Schema, Tool Choice.

## glm-5.3-flash Pricing Overview

At $0.09 per 1M input tokens and $0.30 per 1M output tokens, glm-5.3-flash ranks 378 out of 3648 chat models by input cost. It is more affordable compared to the median of $0.57 for chat models, and is cheaper than 89% of models in this category.

glm-5.3-flash is one of 468 OpenRouter chat models, with support for vision, function calling, reasoning, prompt caching, structured output. its 1,049K-token context window places it in the top 11% of chat models.

## Models to Compare

Alternatives to glm-5.3-flash with comparable capabilities.

| Model | Provider | Input $/1M | Output $/1M |
| --- | --- | --- | --- |
| gemini-2.5-flash-lite | Vertex AI | $0.10 | $0.40 |
| gemini-2.5-flash-lite-preview-09-2025 | Vertex AI | $0.10 | $0.40 |
| gemini-2.5-flash-lite-preview-06-17 | Vertex AI | $0.10 | $0.40 |
| gemini-2.5-flash-lite | Google Gemini | $0.10 | $0.40 |
| gemini-2.5-flash-lite-preview-09-2025 | Google Gemini | $0.10 | $0.40 |

- [Compare gemini-2.5-flash-lite](https://www.getmaxim.ai/bifrost/model-library/compare/vertex_ai/gemini-2.5-flash-lite.md)
- [Compare gemini-2.5-flash-lite-preview-09-2025](https://www.getmaxim.ai/bifrost/model-library/compare/vertex_ai/gemini-2.5-flash-lite-preview-09-2025.md)
- [Compare gemini-2.5-flash-lite-preview-06-17](https://www.getmaxim.ai/bifrost/model-library/compare/vertex_ai/gemini-2.5-flash-lite-preview-06-17.md)
- [Compare gemini-2.5-flash-lite](https://www.getmaxim.ai/bifrost/model-library/compare/gemini/gemini-2.5-flash-lite.md)
- [Compare gemini-2.5-flash-lite-preview-09-2025](https://www.getmaxim.ai/bifrost/model-library/compare/gemini/gemini-2.5-flash-lite-preview-09-2025.md)

## Related Resources

- [Calculate glm-5.3-flash costs](https://www.getmaxim.ai/bifrost/llm-cost-calculator/provider/openrouter/model/glm-5.3-flash.md)
- [Check OpenRouter status](https://www.getmaxim.ai/bifrost/provider-status/openrouter.md)
- [All OpenRouter pricing](https://www.getmaxim.ai/bifrost/llm-cost-calculator/provider/openrouter.md)

## FAQ

### Is glm-5.3-flash cheaper than gemini-2.5-flash-lite?

Yes. glm-5.3-flash costs $0.09 per 1M input tokens compared to gemini-2.5-flash-lite's $0.10 per 1M input tokens, making it 11% more affordable. Both are chat models and share support for vision, function calling, reasoning, web search, prompt caching, structured output.

### How does glm-5.3-flash pricing compare to the average chat model?

glm-5.3-flash input pricing is $0.09 per 1M tokens, which is 84% below the median of $0.57 for chat models. It ranks 378 out of 3648 chat models by input cost, making it cheaper than 89% of models in this category. For output, it costs $0.30 per 1M tokens compared to the median of $1.65.

### What makes glm-5.3-flash different from other OpenRouter models?

Among OpenRouter's 468 chat models, glm-5.3-flash ranks 60 by input cost.

### What are the best alternatives to glm-5.3-flash?

The most comparable chat models to glm-5.3-flash are: gemini-2.5-flash-lite from Vertex AI ($0.10/1M input tokens); gemini-2.5-flash-lite-preview-09-2025 from Vertex AI ($0.10/1M input tokens); gemini-2.5-flash-lite-preview-06-17 from Vertex AI ($0.10/1M input tokens); gemini-2.5-flash-lite from Google Gemini ($0.10/1M input tokens). These alternatives were selected based on similar capabilities, pricing, and provider diversity. You can compare any of these models in detail using the Bifrost Model Library.

### How large is glm-5.3-flash's context window?

glm-5.3-flash supports up to 1,048,576 input tokens, placing it in the top 11% of chat models by context window size (rank 282 of 3577). This makes it suitable for processing long documents, extensive code repositories, or maintaining detailed conversation histories.

### How do I check if OpenRouter is down?

You can monitor OpenRouter service health in real time on the Bifrost OpenRouter Status page. It tracks current component status, active incidents, and historical reliability data pulled from the official status page every 60 seconds.

### How do I calculate glm-5.3-flash costs?

glm-5.3-flash is priced based on input and output tokens. Use the interactive calculator at the top of this page to estimate costs for your specific workload. Enter your expected input and output tokens volume and the calculator will show the total cost breakdown. For reference, processing 1M input tokens costs $0.09 and generating 1M output tokens costs $0.30.

## Related Resources

- [OpenRouter models](https://www.getmaxim.ai/bifrost/model-library/provider/openrouter.md)
- [Model library](https://www.getmaxim.ai/bifrost/model-library.md)
- [LLM cost calculator](https://www.getmaxim.ai/bifrost/llm-cost-calculator.md)
- [Docs: Bifrost docs](https://docs.getbifrost.ai)
- [GitHub: maximhq/bifrost](https://github.com/maximhq/bifrost)
- [Pricing: Bifrost pricing](https://www.getmaxim.ai/pricing)
- [Enterprise: Bifrost enterprise](https://www.getmaxim.ai/enterprise)
- [Book a Demo: Bifrost demo](https://www.getmaxim.ai/book-a-demo)
- [Resources: Bifrost resources](https://www.getmaxim.ai/bifrost/resources.md)

---

*This is a markdown version of [https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/glm-5.3-flash](https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/glm-5.3-flash) for AI/LLM consumption.*