The social-media giant held its big Meta Connect conference in Silicon Valley this week.Mark Zuckerberg is spending heavily on AI and AR technology.Is the CEO still obsessed with efficiency? The WiFi password at the conference suggests he is.

2023 was Mark Zuckerberg's "year of efficiency." He chopped thousands of jobs, eliminated management layers, and took other drastic steps to save Meta money.

That effort continued into 2024 as the Meta CEO whittled down vice-president ranks and took more cost-cutting steps.

However, Meta has also gone on a spending bender for AI, GPUs, and the data centers needed to compete with OpenAI, Microsoft, Google, and Amazon.

So is Zuckerberg still obsessed with efficiency?

The company dropped a big clue this week at its Meta Connect conference in Silicon Valley.

The tech reporter Pranav Dixit attended and noticed that the WiFi password for the event was "effici3ncy."

Pranav Dixit/Threads

Dixit posted about this on Threads, and Zuckerberg liked the post.

Pranav Dixit/Threads

That's a big hint that the Meta CEO is still laser-focused on keeping his company's costs in check, even as it presses on with pricey AI projects such as its Llama open-source AI models.

Meta didn't respond to a request for comment from Business Insider on Thursday.