GET

/v1/schemas/nvidia/chat/stepfun-ai/step-5-preview?kind=output

Accept:

kind outputactivity chathash 92b15993…extracted Oct 16, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. upstream-spec Source trace `0c341a8260dcfa03ea2cbd94d9dcd425afcfdc366ed26034198566e0cd7789b8` { "fetchedAt": 1792127519, "extractorVersion": "1", "verifiedAt": null }

Response body

6 properties · 2 required · 3 $defs

property	type	constraints
model*	string
choices*	object[]
id	string
object	string	default: "chat.completion"
created	integer
usage	object

Types

3 $defs

ChatMessageobject

role*	enum		system \| user \| assistant \| tool
content	string \| ContentPart[]		nullable
reasoning_content	any	Assistant reasoning, separate from the final answer.
tool_calls	ToolCall[]
tool_call_id	string	Required on tool-result messages; matches an assistant tool call ID.
name	string

ContentPartobject | object

ToolCallobject

id*	string
type*	const	"function"
function*	object

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"nvidia","endpointId":"stepfun-ai/step-5-preview","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}