Choosing this model
Selection advice by Y-API. The checks below are suggested evaluations, not published test results.
Where to start
Use it for repository-level work where the input is mostly code and the output is a patch plus an explanation: a migration, a dependency bump, a test that needs rewriting.
What to watch for
The input/output split inside the advertised window is the model’s, and the gateway may enforce a different ceiling. Long-context pricing tiers also apply upstream; this page’s rates are the catalog’s, so check the price table rather than assuming one flat rate.
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
- 1,050,000 tokens
- Input
- Text · Image · File
- Output
- Text
- Listed on OpenRouter
- Parameters listed by OpenRouter
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetoolsverbosity
API pricing & cost estimate
- Estimated credit consumed
- $10.00
- Estimated cash equivalent
- $1.00
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 |
|---|---|---|
| GPT-5.4 | $10.00 | $1.00 |
| GPT-5.5 | $20.00 | $2.00 |
| GPT-5.4 Mini | $3.05 | $0.305 |
API integration examples
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
Bump this package to its next major version. Show the breaking changes that affect this repository, the edits you would make, and the tests that should change with them.
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": "openai/gpt-5.4",
"messages": [
{
"role": "user",
"content": "Bump this package to its next major version. Show the breaking changes that affect this repository, the edits you would make, and the tests that should change with them."
}
],
"max_tokens": 4096
}
JSONHow to evaluate the result
The answer should cite specific call sites in the provided code. A generic changelog summary with no reference to this repository has not done the migration.
Before you choose
Is GPT-5.4 still current after GPT-6 shipped?
It remains a separate catalog entry with its own price. Newer generations do not automatically retire older ones, but they do change which one is worth paying for — compare on your own task set.
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.