OpenAI changelog: April 2026

4 releases from to

Everything OpenAI shipped in April 2026, collected from official OpenAI sources. Each entry is dated and links to the page it came from.

April 2026 at a glance

April 2026 was OpenAI's 7th busiest month of the 12 months to then: 4 releases, below its monthly average of 6. That was 12 releases fewer than March 2026. Most were Model (3), followed by Developer Tools (1).

Releases

4

-12 vs March 2026

Rank of 12 months

7th

Average 6 a month

Most shipped

Model

3 releases

Notable OpenAI launches in April 2026

  • Model

    GPT-5.5 and GPT-5.5 Pro

    Released GPT-5.5 , a new frontier model for complex professional work, to the Chat Completions and Responses API, and released GPT-5.5 Pro for Responses API requests for tougher problems that benefit from more compute. GPT-5.5 supports a 1M token context window, image input, str…

    Source: OpenAI API Changelog
  • Model

    GPT-5.5 in Codex, browser use and automatic approval reviews

    GPT-5.5 is now available in Codex as OpenAI’s newest frontier model for complex coding, computer use, knowledge work, and research workflows. GPT-5.5 in Codex GPT-5.5 is the recommended choice for most Codex tasks when it appears in your model picker.

    Source: Codex Changelog
  • Model

    GPT Image 2

    Released GPT Image 2 , a state-of-the-art image generation model for image generation and editing. GPT Image 2 supports flexible image sizes, high-fidelity image inputs, token-based image pricing, and Batch API support with a 50% discount.

    Source: OpenAI API Changelog

All OpenAI releases in April 2026

Newest first. Each entry links to the official page it came from.

April 20264 releases

GPT-5.5 and GPT-5.5 Pro

Released GPT-5.5 , a new frontier model for complex professional work, to the Chat Completions and Responses API, and released GPT-5.5 Pro for Responses API requests for tougher problems that benefit from more compute. GPT-5.5 supports a 1M token context window, image input, str…

GPT Image 2

Released GPT Image 2 , a state-of-the-art image generation model for image generation and editing. GPT Image 2 supports flexible image sizes, high-fidelity image inputs, token-based image pricing, and Batch API support with a 50% discount.

Where April 2026 sits

OpenAI releases per month, for April 2026 and the 11 months before it. A taller bar means more releases that month; the dated entries for each month are on its own page.

Other companies in April 2026

14 of the companies we track shipped in April 2026; OpenAI ranks 7th by number of releases.

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