This entry is a serving variant of OpenAI: GPT-4.1. A variant shares its base model's tokenizer by construction, so the measurement lives on the base record and this page inherits it.
| Signal | Result | Reference |
|---|---|---|
| Tokenizer signature | Not measured | – |
| API surface | Identical contract to 2 other entries | api_4d6ed85d |
| Context and output | 1,047,576 context · 32,768 max output | declared |
| Reasoning contract | None declared | declared |
| Serving providers observed | None recorded yet | – |
GPT-4.1 is a flagship large language model optimized for advanced instruction following, real-world software engineering, and long-context reasoning. It supports a 1 million token context window and outperforms GPT-4o and...
Supported parameters
max_tokensresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_p
defaults: {}
Cite this page as the evidence record for OpenAI: GPT-4.1 (batch): the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings. The raw data behind every figure is on the data page.
