OpenAI: GPT-5.4 Image 2

openai/gpt-5.4-image-2 · OpenAIUnmeasurable

Declared family: GPT
Declared tokenizer tag: GPT
Entered catalogue: 21 April 2026
Measurement: Deferred: measurement cost above the per-model cap
Evidence confidence: Unknown

What we checked

Four different kinds of evidence, and what each one showed

We checked	What we found	Where it came from
How it counts tokens	Not measured yet	we measured it
How its API is set up	A combination of settings no other listing in the catalogue uses	api_8a2e82e3
How much it can read and write	Reads up to 272,000 tokens at once, writes up to 128,000	its own listing
Whether it thinks before answering	Reasons when asked to, at xhigh, high, medium, low, none, medium by default	its own listing

Declared record

What the catalogue claims about this model

[GPT-5.4](https://openrouter.ai/openai/gpt-5.4) Image 2 combines OpenAI's GPT-5.4 model with state-of-the-art image generation capabilities from GPT Image 2. It enables rich multimodal workflows, allowing users to seamlessly move between reasoning, coding, and...

Modalities: text+image+file->text+image
Declared tokenizer: GPT
Prompt price: $8.00 / M tokens
Completion price: $15.0 / M tokens

Supported parameters

include_reasoninglogprobsmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstop_logprobsverbosity

defaults: {"temperature":null,"top_p":null,"top_k":null,"frequency_penalty":null,"presence_penalty":null,"repetition_penalty":null}

Catalogue entry

History

Every observation, kept as taken

21 April 2026Enters the OpenRouter catalogue declared as GPT.