OpenAI Prepares to Launch ChatGPT 5.5 Spud Model with Advanced Multimodal Features

By: Harsh Vardhan

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Updated on: 20-Apr-2026 01:00 AM

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OpenAI is preparing to release its next major artificial intelligence model, codenamed "Spud," which is expected to launch as ChatGPT 5.5. The company completed pretraining for the model in March, and industry speculation points to a release window between mid-April and early May 2026. This upgrade is anticipated to bring significant advancements, marking a major step forward for OpenAI's chatbot technology.

Key Highlights

• OpenAI completed pretraining for ChatGPT 5.5 Spud in March 2026
• The model will feature advanced multimodality for text, images, audio, and video
• Release window expected between mid-April and early May 2026
• Polymarket predicts April 23 as the most likely launch date

Key Features of ChatGPT 5.5 Spud

The upcoming ChatGPT 5.5 Spud model is expected to introduce advanced native multimodality. This means the model will be able to process and understand text, images, audio, and video within a single system. Such capabilities aim to improve the model's ability to handle complex tasks and deliver smoother operations compared to previous versions.

OpenAI has invested over two years of research in developing the Spud model. According to OpenAI president Greg Brockman, this release represents a significant shift in model development, not just an incremental improvement. Brockman also noted that ChatGPT 5.5 will better understand the context of user requests, reducing the need for users to specify every detail.

Expected Release Timeline

With pretraining completed in March, OpenAI typically spends 3 to 6 weeks on safety evaluations before a public release. This places the likely launch window between mid-April and early May 2026. Current predictions, including those from Polymarket, suggest April 23 as the most probable release date, with about 74% of trading volume supporting this estimate.

The predicted release date also aligns with the "ThursdAI" theory, which observes that OpenAI often announces major updates on Thursdays. However, internal delays due to technical issues remain possible, so the date is not guaranteed. Despite this, the AI community is closely watching the current window as the likely launch period for ChatGPT 5.5 Spud.

Industry Impact and Outlook

The rapid evolution of AI models has shifted the industry from a phase of hype to one of tangible transformation. OpenAI's upcoming release is expected to further accelerate this trend, offering enhanced capabilities for users and developers alike. The introduction of advanced multimodal processing could set a new standard for AI chatbot performance.