OpenAI will release GPT-5.4 model with an extended context window — The Information

LootboxPhobia · 2026-03-05T02:39:20+00:00

OpenAI plans to release the new generation GPT model GPT-5.4, which will expand to a 1,000,000-token context window, significantly enhancing the ability to handle complex tasks, with better performance, lower error rates, and the introduction of extreme reasoning mode.

LootboxPhobia

2026-03-05 02:39:20

Abstract generation in progress

Investing.com - According to The Information, citing an insider, OpenAI plans to release its next-generation GPT model GPT-5.4.

The new model will feature a context window of over 1 million tokens, more than double the 400,000-token capacity of the current GPT-5.2 model. This expansion will enable the model to handle queries containing more words or data. The upgrade will bring its context window capability in line with competing models from Google and Anthropic, which already support 1 million tokens. Previous OpenAI models, including GPT-4.1, supported a 1 million token context window, but this feature was not present in version 5.2.

According to the insider, GPT-5.4 will demonstrate superior performance on tasks that currently take hours to complete. The model will better retain information about user requests and operational parameters across multiple steps, while also reducing error rates. These improvements could benefit applications like OpenAI’s Codex coding tool, which uses AI to automate complex long-duration tasks.

The insider also stated that the model will introduce an extreme reasoning mode, allowing it to allocate more time and computational resources to difficult problems.

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