Zhipu AI

Zhipu AI

GLM 5.3 Flash

Zhipu's newest Flash — MIT-licensed, multimodal, latency/cost-optimized successor to GLM 4.7 Flash. ~1.3M context, vision.

Modalities

Text+Image → Text

Below release

Not established

Weights

Published

zai-org/GLM-5.3-Flash

Where it sits in the catalogue Kyma measures

Every number against every text model Kyma prices per token — a stated rule, not a chosen line-up.

Price · input#5/62

$0.101

output $0.338

median $0.977 · best $0.0494

Price · output#5/62

$0.338

per 1M tokens generated

median $3.4515 · best $0.2164

Availability · 30d

Not measured yet

median 98.2% · best 100.0%

Throughput

Not measured

probe median, one fixed prompt

median 39.4 tok/s · best 316.4 tok/s

Response time

Not measured

probe median, to a complete answer

median 2.40 s · best 0.83 s

Context

1.31M

max output 65,536

published by Zhipu AI, not measured here

Tick above each rail is this model, below it the other 61. Dashed rule is the field median, solid is its best. Better is left; the axis stops at the 90th percentile, so a few models sit past its right edge.

Usage

How much this model is actually called here.

Rank

#105

of 107 active models

Tokens served

0

all-time

Platform share

0.0%

of all tokens

Pricing

Pay per token. Cached input bills at this model’s own cached rate, listed below.

$0.101 /1M input$0.338 /1M output
Hobby10 req/day · 2K in / 500 out
~$0.11/mo
Production1,000 req/day · 2K in / 500 out
~$11.13/mo
Scale20,000 req/day · 2K in / 500 out
~$223/mo
+ Estimate your workload
1,000
2,000
500

Estimated monthly cost

$11.13

$0.3710 / day on GLM 5.3 Flash

Same workload on:

GLM 5.2$122+1000%
GLM 5.3$203+1719%

Estimates use list pricing. Actual bills depend on real token counts, and every response includes its exact cost.

How it compares

Against the peers people actually weigh it against.

SpecGLM 5.3 FlashGLM 5.2GLM 5.3
Input /1M$0.101$1.101$1.89
Output /1M$0.338$3.76$5.94
Context1M1M1M
ToolsYesYesYes
ReasoningYesYesYes
ThroughputNot measured78.1 tok/sNot measured

Quick start

Up and running in under two minutes.

  1. 1

    Create an API key

    Sign up and grab a key from the dashboard — $0.50 free credit, no card required.

    Get API key →
  2. 2

    Make your first request

    Drop in your key and send a chat completion — fully OpenAI-compatible.

    curl https://kymaapi.com/v1/chat/completions \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "glm-5.3-flash",
        "messages": [
          {"role": "user", "content": "Explain prompt caching in one paragraph."}
        ]
      }'
  3. 3

    Stream responses

    Add "stream": true to receive tokens as they arrive.

    curl https://kymaapi.com/v1/chat/completions \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "glm-5.3-flash",
        "stream": true,
        "messages": [{"role": "user", "content": "Hello!"}]
      }'

FAQ

Common questions about this model.

What is the context window of GLM 5.3 Flash?

GLM 5.3 Flash has a 1M-token context window — roughly 1928 pages of text in a single request.

How much does the GLM 5.3 Flash API cost?

$0.101 per 1M input tokens and $0.338 per 1M output tokens. No subscription; you pay only for what you use.

Does GLM 5.3 Flash support function calling?

Yes — GLM 5.3 Flash supports tool/function calling and structured outputs (JSON mode), so it works with agent frameworks out of the box.

Are the weights for GLM 5.3 Flash publicly available?

Yes. Zhipu AI publishes GLM 5.3 Flash's weights as zai-org/GLM-5.3-Flash, so you can download and run the model yourself (https://huggingface.co/zai-org/GLM-5.3-Flash, read 2026-08-29). Kyma serves it because it is convenient and has failover behind it, not because it is the only way to reach it.

Is GLM 5.3 Flash ever served below the precision its creator released it at?

Kyma cannot say. Answering it needs the precision Zhipu AI released GLM 5.3 Flash in, and we could not source that from Zhipu AI's own material — so there is nothing to compare a route against. We publish "not established" rather than reading a low format as a downgrade: on several models in this catalogue a low format is exactly how the creator ships it.

How do I use GLM 5.3 Flash?

Kyma is OpenAI-compatible: point your SDK's base URL at https://kymaapi.com/v1, use your Kyma API key, and set the model to glm-5.3-flash. Signing up is free and includes $0.50 of credit — no card required.

Start with $0.50 free credit — no card required.Create account →

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