According to a report from The Information , OpenAI is planning the imminent release of GPT-5.4, which is to be equipped with an expanded context window of one million tokens and a new “extreme” thinking mode. The update follows the recent launches of GPT-5.3 Codex and GPT-5.3 Instant. The new model is to feature a context window of one million tokens, more than double the 400,000 tokens of GPT-5.3. With this, OpenAI is catching up with the long-context models from Google and Anthropic. This