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Z.aiπŸ‡¨πŸ‡³

GLM-5.3-Flash

Z.ai's multimodal Flash model combines visual understanding with coding and tool use. Its sparse architecture activates 18 billion of 320 billion parameters and mixes attention mechanisms to handle long inputs efficiently.

CONTEXT1M
MAX OUTPUT128K
LAST SCAN13 Nov 2026
πŸ†First observed free at NVIDIA on .
Open weights TextImage

Free aggregator routes

These are the aggregator routes recorded in the current or last published catalog. Each route keeps its exact model ID and thinking information.

The supplied October 14 test and recorded successful tests from November 5 through November 12 establish access to this exact River route without a top-up using the dedicated account that had never held credit or linked a payment method. The latest supplied successful test at 2026-11-13T12:03:08+00:00 establishes the same access at that time. Separately, the supplied prior review records advertised prices of $0.12 input, $0.024 cached input and $0.40 output per million tokens. Current documentation requires JavaScript to display prices. Continued availability and quotas remain unverified.

Limits above: River. Available gateway routes are listed below.

River explicitly lists zai-org/GLM-5.3-Flash at https://docs.river.ai/guides/inference-models/, matching the creator repository and supplied reviewed standard Flash entries. Preserved the established duplicate_key and exact runtime namespace. Shared advertised identity does not establish identical serving configurations or pinned revisions.

Thinking
Not advertised by this API
Model ID Β· River APIzai-org/GLM-5.3-Flash
Max output here
Not documented
LLM7
Info
Thinking
Supported
Model ID Β· LLM7 APIGLM-5.3-Flash
Context here
400K
Max output here
Not documented

Model sources

Use it through LiteLLM

Import the current LiteLLM-compatible YAML and use the exact model ID shown above. The catalog is generated from the same reviewed scan data as the download.

Download LiteLLM YAML

Sources & references