Leaks suggests OpenAI GPT-5.4 launch is imminent

OpenAI insiders and code watchers see strong signs that GPT-5.4 sits right around the corner. Developers spotted the model name twice this week inside public pull requests for the Codex repository.

One reference even tied it to a new fast mode command before editors rushed to change it back to the current 5.3 version. The same slip showed up again days later, and the model briefly appeared as alpha-gpt-5.4 in a live endpoint. OpenAI continues to iterate new updates, so another release feels close after the AI firm dropped GPT-5.3-Codex only weeks ago.

The leaks show a clear picture of what users can expect. Code hints point to a 2-million-token context window that handles massive documents or long conversations without losing track.

This step moves AI closer to true agents that finish multi-step jobs on their own. Vision upgrades look sharp as well, with full-resolution image handling that skips the usual compression blur. Early tests suggest these changes will make coding and research tasks feel smoother and more reliable.

Meanwhile, OpenAI has shared no reaction to this new leak. Their model list still highlights GPT-5.2 for everyday chat and reasoning, while GPT-5.3-Codex leads in long-horizon agent work.

No blog post mentions 5.4 yet, which fits their pattern of staying silent until the last minute. The company shifted into high gear last year, releasing GPT-5 in August 2025, then 5.1 in November and 5.2 soon after. That quick pace continues now as we await the GPT-5.4 release.