GLM 5.3 Flash

Top tier

size Long free on 2 of 2 routes Checked by listing

Z.ai's fast model, free on NVIDIA Build and OpenCode Zen.

Same as No scores on record

Made by Z.ai

About

GLM-5.3 Flash comes from Z.ai and runs under the MIT license with open weights. It first showed up unnamed before Z.ai gave it a name. We have no test scores on record for this model itself, so we show none. Its free endpoints are NVIDIA Build, which retires around 29 Oct, and OpenCode Zen.

Best for

Writing code
Everyday coding help

Scores on record

No scores on record for this model. We do not add numbers from other models.

All routes

NVIDIA Build

hosted API Live

Free through NVIDIA Build. The free routes on OpenRouter are gone.

Last checked 27 Oct 2026 at 11:10 IST

Use it free in 1 minute

Open NVIDIA Build.
Sign in, or ask us and we will walk you through it.
Pick the model and send a test message.
If it asks for a key, add yours in place of YOUR_KEY.

OpenCode Zen

glm-5.3-flash-free Live

Free on OpenCode Zen. On NVIDIA Build the free endpoint retires around 29 Oct.

Last checked 27 Oct 2026 at 11:10 IST

Use it free in 1 minute

provider: opencode
model: glm-5.3-flash-free

Add that to your OpenCode config, then pick the model in the model list.

History

27 of 27 checks passed · listing checks, first one 24 Oct 2026 · last 20 shown

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11:10 passed

Each mark is one check we actually ran; the time is when it ran. A hollow mark is a failed check. No mark means no check in the log.