Does Responses API support `stop` parameter or not?
OpenAI Developer Community
April 28, 2026
The Responses API does not support stop sequences as an API parameter.
Thanks. Then what’s written in this article seems to be wrong. I’ve sent my feedback via the form at the bottom of the article.
https://help.openai.com/en/articles/5072518-controlling-the-length-of-openai-model-responses
What’s also confusing for me is that there’s no information regarding stop sequences in the migration guide.
developers.openai.com
Migrating from Chat Completions - Migrate to the Responses API | OpenAI API
The Responses API is our new API primitive, an evolution of Chat Completions which brings added simplicity and powerful agentic primitives to your integrations.
But anyway, thank you for your confirmation that there is no stop parameter in the Responses API.
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