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Compare models across families. Choices update immediately and stay in the URL; select a concrete tier before comparing a release group.

Model A

openai · gptModel B

stepfun · step-image

Only fields with comparable data on at least one side are shown; the other side explains what is missing.
Field	GPT-2 ↗	NextStep-1.1 ↗
First public date	2019-02-14Source ↗	2025-12-24Source ↗
Context (exact tokens)	1,024 tokensSource ↗	Not disclosed
Total parameters	1.5BSource ↗	14BSource ↗
Input modalities	textSource ↗	text · imageSource ↗
Output modalities	Not disclosed	imageSource ↗
Capability tags	generation · few_shotSource ↗	image_generation · image_editingSource ↗
Open weights	YesSource ↗	YesSource ↗
License	Modified MITSource ↗	Apache-2.0Source ↗
Current status	LegacySource ↗	CurrentSource ↗
Sources and limitations	All sources	All sources