---
title: "Open Responses vs. Chat Completion: A new era for AI apps"
url: https://daily.dev/posts/open-responses-vs-chat-completion-a-new-era-for-ai-apps-by4cb4wwc
source_url: https://thenewstack.io/open-responses-vs-chat-completion-a-new-era-for-ai-apps/
type: article
source: "The New Stack"
published: 2026-01-27T19:07:18.589Z
updated: 2026-03-15T03:41:02.076Z
tags: ["ai", "ai-agents", "architecture", "llm", "openai"]
reading_time: 6
upvotes: 1
comments: 0
language: en
---

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# Open Responses vs. Chat Completion: A new era for AI apps

**[The New Stack](https://daily.dev/sources/newstack)** · 6 min read · 1 upvotes · 0 comments

## Summary

OpenAI transitioned from the stateless Chat Completion API to the new Responses API in March 2025, addressing limitations in building agentic AI applications. The Open Responses specification, created in collaboration with Nvidia, Vercel, Hugging Face, Ollama, and others, provides a standardized, provider-agnostic interface for multi-turn, stateful LLM interactions. Key improvements include server-side state management, native tool orchestration, explicit reasoning token handling, semantic event streaming, and first-class multimodal support. The specification solves critical problems like manual state management, tool orchestration complexity, and vendor lock-in, enabling developers to build portable AI applications that work across multiple model providers with a single integration.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://thenewstack.io/open-responses-vs-chat-completion-a-new-era-for-ai-apps/>

---

Tags: [#ai](https://daily.dev/tags/ai), [#ai-agents](https://daily.dev/tags/ai-agents), [#architecture](https://daily.dev/tags/architecture), [#llm](https://daily.dev/tags/llm), [#openai](https://daily.dev/tags/openai)

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