Choosing this model
Selection advice by Y-API. The checks below are suggested evaluations, not published test results.
Where to start
Use the dated ID when you want to compare a specific Flash revision on patch generation or tool-driven maintenance. Preserve the failing test alongside each prompt so regressions are visible.
What to watch for
A dated model name improves experiment traceability but does not freeze a gateway’s serving configuration. Do not silently replace the earlier unsuffixed ID and treat past results as measurements of this revision.
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
- Output
- Text
- Listed on OpenRouter
- Parameters listed by OpenRouter
frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_pparallel_tool_callspresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_atop_ktop_logprobstop_p
Estimate your cost
- Estimated credit consumed
- $0.30
- Estimated cash equivalent
- $0.03
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 |
|---|---|---|
| DeepSeek V4 Flash 0731 | $0.30 | $0.03 |
| DeepSeek V4 Flash 0423 | Free — no credit deducted | |
| DeepSeek V4.1 Flash | $0.70 | $0.07 |
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 Python average function returns sum(xs) / len(xs). Define behavior for an empty list and write two tests before proposing a fix.
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": "deepseek/deepseek-v4-flash-0731",
"messages": [
{
"role": "user",
"content": "A Python average function returns sum(xs) / len(xs). Define behavior for an empty list and write two tests before proposing a fix."
}
],
"max_tokens": 4096
}
JSONHow to evaluate the result
The response should choose and document an empty-input contract, test it and preserve the nonempty case. Run the tests rather than judging the patch by appearance.
Before you choose
Why keep the 0731 suffix in my request?
It selects this catalog entry rather than the earlier Flash entry. Record it with sampling settings and tool versions so later evaluations compare identifiable configurations.
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.