Choosing this model
Selection advice by Y-API. The checks below are suggested evaluations, not published test results.
Where to start
Evaluate it in a repository task with a real feedback loop: locate a failure, propose a patch, run tests and revise. Score completed requirements and unintended changes, not the length of the plan.
What to watch for
An agent harness supplies tools, state and execution limits; the model does not acquire those through this API call alone. Its larger context also makes repeated full-history requests worth budgeting explicitly.
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_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p
Estimate your cost
- Estimated credit consumed
- $10.50
- Estimated cash equivalent
- $1.05
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 |
|---|---|---|
| Kimi K3 | $10.50 | $1.05 |
| Kimi K2.6 | $2.95 | $0.295 |
| Claude Opus 5 | $17.50 | $1.75 |
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
An API times out only on large exports. Design a diagnostic sequence that distinguishes slow SQL, serialization cost and proxy timeouts, without changing production data.
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": "moonshotai/kimi-k3",
"messages": [
{
"role": "user",
"content": "An API times out only on large exports. Design a diagnostic sequence that distinguishes slow SQL, serialization cost and proxy timeouts, without changing production data."
}
],
"max_tokens": 4096
}
JSONHow to evaluate the result
Require measurements that isolate the three stages and a safe order of investigation. In an agent run, check that each tool result changes the next decision rather than being ignored.
Before you choose
Does calling K3 automatically start multiple agents?
No. Multi-agent behavior requires orchestration in your application or client. Set tool permissions, budgets and stopping rules separately from the model selection.
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.