GLM 5.3 Flash

z-ai/glm-5.3-flash

GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains accurate long-context behavior while...

InputImageTextVideo
OutputText
Input / Outputclub$0.159 / $0.53per 1M tokens · USD
Context window1.3Mtoken
Maximum output131.1Ktoken

Pricing

Current model usage rates. Choose your plan to see its published prices.

Pricing
UsagePricing
InputUS$0.159/ 1M token
Cache readUS$0.0318/ 1M token
OutputUS$0.53/ 1M token

Membership and model usage are billed separately. Compare plans

Capabilities

Input
ImageTextVideo
Output
Text
Context window
1,310,720 token
Maximum output
131,072 token
Reasoning
max · high · low

Providers

Model supply available through Vecbase.

Via OpenRouter

Access is subject to your account’s permissions and model availability.

Frequently asked questions

What is GLM 5.3 Flash, and who develops it?

GLM 5.3 Flash is a model from z-ai. Its model ID on Vecbase is z-ai/glm-5.3-flash. GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains accurate long-context behavior while...

How much does GLM 5.3 Flash cost on Vecbase?

For GLM 5.3 Flash, the Club plan lists USD 0.159 per 1 million input tokens and USD 0.53 per 1 million output tokens, as of 10/22/2026, 7:33:19 PM UTC. See the pricing table for cache rates, input-length tiers and other usage types. Membership fees are separate.

How many tokens fit in GLM 5.3 Flash’s context window?

GLM 5.3 Flash has a context window of 1,310,720 tokens. Input and output must fit within the limits of the API you use.

What is the maximum output length for GLM 5.3 Flash?

GLM 5.3 Flash can generate up to 131,072 tokens per response. Your API or request settings may set a lower limit.

Can GLM 5.3 Flash call tools in an agent workflow?

Yes. GLM 5.3 Flash supports tool calling. Your application provides the tool definitions and runs the tools the model requests.

Does GLM 5.3 Flash support structured outputs?

Yes. GLM 5.3 Flash supports structured output. Set the required format in your API request and check the returned data before using it.

Which input and output formats does GLM 5.3 Flash support?

GLM 5.3 Flash accepts Image, Text, and Video and produces Text.

Which providers make GLM 5.3 Flash available through Vecbase?

Vecbase offers GLM 5.3 Flash through OpenRouter. Availability may vary by provider.

Which model ID should an agent use to request GLM 5.3 Flash?

Use z-ai/glm-5.3-flash as the model identifier for GLM 5.3 Flash. See Vecbase’s API documentation for authentication, required inputs and supported request formats.

Which reasoning settings are listed for GLM 5.3 Flash?

GLM 5.3 Flash supports these reasoning levels: max, high, and low. Available options depend on your API.

What does an agent need to access GLM 5.3 Flash through Vecbase?

To use GLM 5.3 Flash, you need an authenticated account with the required permissions, sufficient balance and the relevant capability enabled. See the documentation for setup.

Is a release date available for GLM 5.3 Flash?

We do not yet have a confirmed release date for GLM 5.3 Flash.

Which models can I compare with GLM 5.3 Flash on Vecbase?

You can compare GLM 5.3 Flash with GLM 4.5 (z-ai/glm-4.5), GLM 4.5 Air (z-ai/glm-4.5-air), and GLM 4.5V (z-ai/glm-4.5v). Check their capabilities and prices to find the best fit for your task.