GLM 5.3 Flash
GLM-5.3-Flash is a native multimodal model from Z.ai.
Model by Z.ai
Install
Pick your client. Read the repository before you give any tool access to your data.
{
"model": "z-ai/glm-5.3-flash",
"baseURL": "https://openrouter.ai/api/v1"
}OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.
Settings it needs
OPENROUTER_API_KEYrequiredsecret
Get the weekly diff
The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.
About
Use cases: code-generation, model-inference
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Price and limits
| Variant | Input $/M tokens | Output $/M tokens | Cached input $/M |
|---|---|---|---|
| Standard | $0.15 | $0.5 | $0.03 |
Batch API z-ai/glm-5.3-flash:batch | $0.05 | $0.18 | — |
Price as of Oct 26, 2026 from OpenRouter · provider's own prices: docs.z.ai. Prices change often; check before you rely on one.
- Provider
- Z.ai
- Model id
z-ai/glm-5.3-flash- Context window
- 1,048,576 tokens (1M)
- Max output
- 943,717 tokens
- Input
- text, image, video
- Output
- text
- Tool calling
- Yes
- Structured outputs
- Yes
- Reasoning
- Yes
- Weights
- Open: zai-org/GLM-5.3-Flash
- Released
- Aug 26, 2026
- Also served as
~z-ai/glm-flash-latest
Details
- Auth
- API key
- License
- License unknown
- Website
- z.ai
- First seen
- Oct 24, 2026
- Last checked
- Oct 26, 2026
- Source
- OpenRouter
More from Z.ai
- 0.681score
GLM 5.3
Z.ai
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks.
ModelAFreshness: A$0.0699 / $1.41M ctxOpen weights - 0.681score
GLM 5
Z.ai
GLM-5 is Z.ai’s flagship open-source foundation model engineered for complex systems design and long-horizon agent workflows.
ModelAFreshness: A$1 / $3.2205K ctxOpen weights - 0.681score
GLM 4.5 Air
Z.ai
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.
ModelAFreshness: A$0.13 / $0.85131K ctxOpen weights - 0.681score
GLM 5.2
Z.ai
GLM 5.2 is a large-scale reasoning model from Z.ai.
ModelAFreshness: A$0.0341 / $71M ctxOpen weights - 0.681score
GLM 5.1
Z.ai
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks.
ModelAFreshness: A$1.4 / $4.4205K ctxOpen weights - 0.681score
GLM 4.5
Z.ai
GLM-4.5 is our latest flagship foundation model, purpose-built for agent-based applications.
ModelAFreshness: A$0.6 / $2.2131K ctxOpen weights
Cite this page
GLM 5.3 Flash: price, context window, tool use. Agent Mart. https://agentmart.dev/models/z-ai-glm-5-3-flash (last updated 2026-10-26)