Choosing this model
Selection advice by Y-API. The checks below are suggested evaluations, not published test results.
Where to start
Try it on interface inspection where screenshots, requirements and code need to agree. Separate factual visual observations from proposed changes so unsupported guesses can be caught.
What to watch for
Flash is not merely a price setting on GLM 5.3. It is a distinct model with different modalities. Neither native vision nor a tools parameter proves the corresponding Y-API request path works.
Model specifications
These are OpenRouter model-level specifications, not a Y-API compatibility test. A particular route may accept fewer input formats, parameters or tokens. Verify the features you need with a small request; a successful text response does not validate vision or tool calling.
- Context window
- 1,048,576 tokens
- Input
- Text · Image · Video
- Output
- Text
- Listed on OpenRouter
- Parameters listed by OpenRouter
frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_pparallel_tool_callspresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p
Estimate your cost
- Estimated credit consumed
- $0.40
- Estimated cash equivalent
- $0.04
Illustrative token budget, not measured usage or a quote. Includes input and output; excludes separate media charges, cache discounts and retries. Include billed reasoning tokens in your output budget where applicable. Actual billing follows usage returned by the service.
$1 paid adds $10 of credit. Cash equivalent = credit consumed ÷ 10; this is not the model publisher’s list price.
| Model | Estimated credit consumed | Estimated cash equivalent |
|---|---|---|
| GLM 5.3 Flash | $0.40 | $0.04 |
| GLM 5.3 | $3.90 | $0.39 |
| Qwen3.8 Flash | $0.45 | $0.045 |
Use the API
These minimal, text-only requests use the exact Y-API model ID. They do not demonstrate image, audio, video, file or tool support. The output limit also needs room for reasoning; an empty answer with finish_reason=length can mean the budget was exhausted.
A task to try
A form labels a required field only with a red border. Propose an accessible validation design covering text, focus and screen-reader feedback.
Set the TOKEN environment variable to a key from your console. Run this on your server or locally; never expose a key in browser code or a public repository.
curl --fail-with-body --silent --show-error --max-time 120 \
'https://api.y-api.bestvirtualgoods.com/v1/chat/completions' \
-H "Authorization: Bearer ${TOKEN:?Set TOKEN first}" \
-H 'Content-Type: application/json' \
--data-binary @- <<'JSON'
{
"model": "z-ai/glm-5.3-flash",
"messages": [
{
"role": "user",
"content": "A form labels a required field only with a red border. Propose an accessible validation design covering text, focus and screen-reader feedback."
}
],
"max_tokens": 4096
}
JSONHow to evaluate the result
Look for a textual error tied to the input, non-color cues and deliberate focus handling. Add a known screenshot to a separate vision test before relying on visual inspection.
Before you choose
Is GLM 5.3 Flash just a smaller GLM 5.3?
The publisher describes a newly trained base and a different hybrid attention architecture. Treat it as a separate candidate, not a drop-in quality-equivalent pricing tier.
Sources & scope
Technical facts come from the cited model page and, where available, its linked publisher card. A card describes that checkpoint; it is not proof of the weights a gateway serves. Prices come only from the Y-API catalog. We do not claim measured latency, uptime or benchmark scores for this endpoint.