GET

/v1/schemas/replicate/chat/models/openai/gpt-5.4/predictions

Accept:

kind inputactivity chathash ac22c0a7…extracted Oct 7, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. upstream-spec Source trace `d4f35ee98c6b58fceddc88d1c182792fceacecd9bb625408078b358c5ae6fc3d` { "fetchedAt": 1791350061, "extractorVersion": "1", "verifiedAt": null }

Request body

4 properties · 1 required · 3 $defs

property	type	description
input*	Input
stream	boolean	This field is deprecated.
webhook	string	An HTTPS URL for receiving a webhook when the prediction has new output. The webhook will be a POST request where the request body is the same as the response body of the [get prediction](#predictions.get) operation. If there are network problems, we will retr…
webhook_events_filter	enum[]	By default, we will send requests to your webhook URL whenever there are new outputs or the prediction has finished. You can change which events trigger webhook requests by specifying `webhook_events_filter` in the prediction request:

Types

3 $defs

Inputobject

prompt	string	The prompt to send to the model. Do not use if using messages.
messages	object[]	A JSON string representing a list of messages. For example: [{"role": "user", "content": "Hello, how are you?"}]. If provided, prompt and system_prompt are ignored.	default: []
verbosity	enum	An enumeration.	low \| medium \| high
image_input	string[]	List of images to send to the model	default: []
system_prompt	string	System prompt to set the assistant's behavior
reasoning_effort	enum	An enumeration.	none \| low \| medium \| high \| xhigh
max_completion_tokens	integer	Maximum number of completion tokens to generate. For higher reasoning efforts you may need to increase your max_completion_tokens to avoid empty responses (where all the tokens are used on reasoning).

reasoning_effortenum

An enumeration.

none | low | medium | high | xhigh

verbosityenum

An enumeration.

low | medium | high

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"replicate","endpointId":"models/openai/gpt-5.4/predictions","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}