GLM-5.3 Flash API

Fast model for coding, tool use, structured output, and long-running agent workflows. Fast coding, tool use, structured output, and long-running agent workflows.

CodingTool callsFast agentsOpenAI compatible

Gonka24 base price

$0.07

input / 1M tokens

$0.19

output / 1M tokens

Base public rate before account-specific pricing. Actual paid-provider cost floors can apply.

Custom context

200,000 tokens

Rounded down from the Gonka24 routing limit; this is not the vendor's headline limit.

Maximum output

16,000 tokens

Rounded down from the gateway default ceiling for this model.

Cached input

Account-specific

No fixed public cache rate; virtual cache pricing is configured per account.

Last verified

31 Aug 2026

Catalog price source updated 2026-09-20.

Capabilities

Streaming

Supported

Set stream: true for Server-Sent Events.

Tool calling

Supported

OpenAI-style tools and tool_choice; behavior can vary by selected route.

Reasoning

Route-dependent

Reasoning output is preserved when the selected upstream returns it. A stable model-specific effort mapping is not advertised.

Text output

Supported

Chat and text completions.

Image generation

Not supported

Gonka24 does not expose an image-generation endpoint for this model.

Input modalities: text. Output modality: text only. Tool and reasoning behavior can vary when traffic is routed to different compatible upstreams.

Supported request parameters

These fields are accepted by the Gonka24 OpenAI-compatible chat gateway. A selected upstream may ignore sampling controls it does not implement.

modelmessagesstreamstream_optionsmax_tokensmax_completion_tokenstemperaturetop_pstopfrequency_penaltypresence_penaltyresponse_formatseedtoolstool_choiceuser

cURL example

OpenAI-compatible chat completions

curl https://api.gonka24.com/v1/chat/completions \
  -H "Authorization: Bearer $GONKA24_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "glm-5.3-flash",
    "messages": [{"role": "user", "content": "Explain why the sky is blue."}],
    "stream": true,
    "max_tokens": 512
  }'