---
title: "GPT-5.5 is available in the Responses and Chat Completions APIs with a 1M context window.\n\nGPT-5.5-p..."
source_name: "OpenAI Developers(@OpenAIDevs)"
original_url: "https://x.com/OpenAIDevs/status/2047742589982654915"
canonical_url: "https://www.traeai.com/articles/54a6f54f-ece7-43ff-8f60-5dcb1306d98a"
content_type: "tweet"
language: "英文"
score: 7
tags: ["GPT","OpenAI","API","AI"]
published_at: "2026-04-24T18:20:53+00:00"
created_at: "2026-04-26T23:23:53.528588+00:00"
---

# GPT-5.5 is available in the Responses and Chat Completions APIs with a 1M context window.

GPT-5.5-p...

Canonical URL: https://www.traeai.com/articles/54a6f54f-ece7-43ff-8f60-5dcb1306d98a
Original source: https://x.com/OpenAIDevs/status/2047742589982654915

## Summary

OpenAI发布GPT-5.5，支持1M上下文窗口，并推出更高精度的GPT-5.5-pro版本。

## Key Takeaways

- GPT-5.5在Responses和Chat Completions API中提供1M上下文窗口。
- GPT-5.5-pro专为高精度任务优化，适用于Responses API。
- 新版本可能显著提升复杂任务处理能力。

## Content

Title: OpenAI Developers on X: "GPT-5.5 is available in the Responses and Chat Completions APIs with a 1M context window.

GPT-5.5-pro is also available in the Responses API for higher-accuracy work.

https://t.co/Q7PLCo4pse" / X

URL Source: http://x.com/OpenAIDevs/status/2047742589982654915

Published Time: Sun, 26 Apr 2026 23:23:43 GMT

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GPT-5.5 is available in the Responses and Chat Completions APIs with a 1M context window. GPT-5.5-pro is also available in the Responses API for higher-accuracy work.

[![Image 3](https://pbs.twimg.com/card_img/2047375420060803072/jFfM4oaQ?format=jpg&name=small) Introducing GPT-5.5](https://t.co/Q7PLCo4pse)

[From openai.com](https://t.co/Q7PLCo4pse)

[6:20 PM · Apr 24, 2026](https://x.com/OpenAIDevs/status/2047742589982654915)

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