GPT 5.4 arrives on ChatGPT: 5 improvements to know
Source: Mashable Tech
OpenAI dropped GPT‑5.4 this week, announcing that ChatGPT power users should notice improvements right away. The launch follows the recent release of GPT‑5.3 Instant, a more conversational model geared toward everyday users.
OpenAI described GPT‑5.4 as the “most capable and efficient frontier model for professional work,” targeting professionals and developers. The company also introduced GPT‑5.4 Thinking and GPT‑5.4 Pro, aimed at users who want peak performance.
Improved efficiency
OpenAI said that GPT‑5.4 operates more efficiently than ever. It is the company’s “most token‑efficient reasoning model yet, using significantly fewer tokens to solve problems when compared to GPT‑5.2, translating to reduced token usage and faster speeds.” In practice, GPT‑5.4 can solve problems and deliver answers with fewer tokens.
Better at doing real‑world tasks
The new model is far more capable of completing real‑world tasks related to knowledge work. OpenAI noted:
“On GDPval, which tests agents’ abilities to produce well‑specified knowledge work across 44 occupations, GPT‑5.4 achieves a new state of the art, matching or exceeding industry professionals in 83.0 % of comparisons, compared to 70.9 % for GPT‑5.2.”
In other words, it can perform many job‑related tasks at a level comparable to human professionals.
Improved accuracy
Compared with GPT‑5.2, GPT‑5.4 is 33 % less likely to make false claims, and its statements are 18 % less likely to contain errors, according to OpenAI.
More flexible approach to thinking
Instead of simply giving GPT‑5.4 a prompt and letting it run, you can now course‑correct the model as it generates output. In ChatGPT, GPT‑5.4 Thinking can provide an upfront plan of its reasoning, allowing you to adjust the course mid‑response and arrive at a final output that’s more closely aligned with your needs without additional turns.
ChatGPT for Excel add‑in
Enterprise customers can also use GPT‑5.4 with a new OpenAI plugin, the ChatGPT for Excel add‑in. According to OpenAI, the latest models are more capable of creating and analyzing spreadsheets.
How to try GPT‑5.4
The new model begins rolling out today and will be available in ChatGPT, Codex, and via the API. For this release, a paid ChatGPT subscription is required to access the new models, at least for now.
You can read OpenAI’s full blog post about the launch on the company’s website: .
Disclosure: Ziff Davis, Mashable’s parent company, filed a lawsuit against OpenAI in April 2025, alleging it infringed Ziff Davis copyrights in training and operating its AI systems.