OpenAI: GPT-5 Image

openai/gpt-5-image · OpenAINot yet established

Declared family: GPT
Evidence confidence: Unknown
Declared tokenizer tag: GPT
Entered catalogue: 14 October 2025
Last tested: Not yet measured
Measurement: Awaiting measurement

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	Identical contract to 1 other entry	api_5c2c5483
Context and output	400,000 context · 128,000 max output	declared
Reasoning contract	Mandatory	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

[GPT-5](https://openrouter.ai/openai/gpt-5) Image combines OpenAI's GPT-5 model with state-of-the-art image generation capabilities. It offers major improvements in reasoning, code quality, and user experience while incorporating GPT Image 1's superior instruction following,...

Modalities: text+image+file->text+image
Declared tokenizer: GPT
Prompt price: $10.0 / M tokens
Completion price: $10.0 / M tokens

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokenspresence_penaltyreasoningresponse_formatseedstopstructured_outputstemperaturetop_logprobstop_p

defaults: {"temperature":null,"top_p":null,"frequency_penalty":null}

Catalogue entry

History

Every observation, kept as taken

14 October 2025Enters the OpenRouter catalogue declared as GPT.

Cite this page as the evidence record for OpenAI: GPT-5 Image: 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.