Twitter officially transitioned to X in 2023, marking one of the most significant brand transformations in the history of the internet. Today, the domain twitter.com automatically redirects users to x.com. While the core essence of a real-time microblogging platform remains, the service has evolved far beyond its original scope as a "SMS-based social network." Under the ownership of Elon Musk and the subsequent integration into the xAI ecosystem, X has shifted its focus toward becoming an "everything app." This transformation encompasses everything from integrated artificial intelligence and long-form video hosting to job searching and future financial services.

The Rebranding From Twitter to X

The shift from the iconic blue bird logo to a minimalist "X" was not merely a cosmetic change. It represented a fundamental pivot in the platform’s mission. The original Twitter was designed as a digital town square for short-form updates, limited initially to 140 characters and later 280. However, the vision for X is to mirror the functionality of multipurpose Asian platforms like WeChat, where social media, payments, and services coexist in a single ecosystem.

In mid-2023, the rebranding process reached its peak when the headquarters in San Francisco replaced the traditional Twitter sign with a glowing X. Following this, the mobile applications on iOS and Android updated their interfaces, replacing "Tweets" with "Posts" and "Retweets" with "Reposts." By early 2024, the transition was complete, with the old URL structure gradually phasing out in favor of the x.com identity.

Core Features and User Interface Changes

For users who have not visited the platform since its rebranding, the interface may feel familiar but functionally distinct. The primary feed, known as the Timeline, is still the heart of the experience, but it is now divided more sharply into "For You" and "Following" tabs.

Posts and Content Limits

One of the most drastic changes is the removal of the strict character limit for certain users. While standard unverified accounts still operate within a limited character count for basic posts, subscribers to X Premium can now publish content that spans thousands of words. This has turned X into a hybrid platform that competes not only with other social media sites but also with long-form blogging platforms.

Key components of a modern post include:

  • Text: Up to 25,000 characters for Premium subscribers.
  • Media: High-definition images and videos.
  • Polls: Interactive voting tools for community engagement.
  • Formatting: Bold and italic text options are now available for subscribers, allowing for better readability in long-form content.

Multimedia and Long Form Video

X has increasingly positioned itself as a video-first platform. In our testing of the video upload capabilities, we found that the platform now supports 1080p and even 4K video uploads for specific tiers. High-level subscribers can upload videos up to several hours in length, a feature designed to attract independent filmmakers, journalists, and live-streamers who previously relied exclusively on platforms like YouTube.

The integration of "X TV" apps and enhanced streaming stability suggests a push toward capturing the digital broadcast market. Live broadcasting on X (formerly Twitter Spaces and Periscope technology) remains a major draw, particularly for breaking news and real-time political commentary.

Understanding X Premium and Subscription Tiers

The most controversial yet impactful change under the new ownership is the monetization of verification. The "blue checkmark," which once signified a manually verified person of public interest, is now primarily a badge for X Premium subscribers.

X Premium Tiers

X has segmented its subscription model into three distinct tiers to cater to different user needs:

  1. Basic: This tier offers essential tools like the "Edit Post" feature, longer posts, and the ability to undo posts. However, it does not include the checkmark or a boost in visibility.
  2. Premium: This is the most popular tier, granting the blue checkmark, a significant boost in the "For You" feed, and access to the Creator Ads Revenue Sharing program. Subscribers also see 50% fewer ads.
  3. Premium+: Designed for power users, this tier removes ads entirely from the "For You" and "Following" timelines and provides the maximum visibility boost. It also includes full access to the Grok AI chatbot.

Creator Monetization

For the first time in the platform's history, users can directly earn a living from their content through the Ads Revenue Sharing program. To qualify, a creator must be an X Premium subscriber, have at least 500 followers, and have reached 5 million organic impressions across their posts within the last three months. This system incentivizes high-engagement content and has significantly altered the type of information that trends on the platform.

The Role of Grok AI and xAI Integration

A defining feature of the X experience in 2024 and 2025 is the integration of Grok. Grok is an artificial intelligence model developed by xAI, Elon Musk’s AI company. Unlike many other AI models, Grok has real-time access to the stream of data flowing through X, allowing it to provide up-to-the-minute information on breaking news.

Users can interact with Grok via a dedicated tab. It can summarize trending topics, help users draft posts, and answer complex questions based on the latest discourse. In March 2025, the relationship between the two entities deepened when xAI officially acquired X Corp in an all-stock transaction, valuing the combined social and AI entity at approximately $45 billion. This acquisition indicates that the future of X is inextricably linked to the development of Large Language Models (LLMs) and real-time data processing.

Safety, Moderation, and Community Notes

The approach to content moderation has shifted from a centralized, employee-led model to a crowd-sourced model known as Community Notes.

How Community Notes Work

Instead of the platform's staff deciding what is "true" or "false," approved contributors from diverse perspectives can add context to posts that might be misleading. For a note to appear on a post, it must be rated as "helpful" by contributors who have historically disagreed with each other. This algorithmic approach is designed to prevent partisan bias and provides a layer of transparency that was previously absent.

Security and Privacy Features

X has introduced several technical upgrades to protect user privacy:

  • Encrypted Direct Messages: Users can now opt into end-to-end encrypted chats, ensuring that the platform itself cannot read private communications.
  • Audio and Video Calling: Integrated into the Direct Message interface, these features allow users to communicate via voice or video without sharing their phone numbers.
  • Two-Factor Authentication (2FA): While SMS-based 2FA is now a Premium-only feature, all users are encouraged to use authentication apps or security keys for enhanced account protection.

Evolution of the Technical Stack

The transition from Twitter to X involved a massive overhaul of the platform's backend infrastructure. Historically, Twitter was known for its "Fail Whale" era, where the site frequently crashed due to high traffic. Today, the platform uses a sophisticated stack primarily built on Scala, Java, and JavaScript.

Since the acquisition, the engineering team has focused on "extreme" infrastructure optimization. This included reducing the number of microservices and consolidating data centers. The recommendation algorithm, which dictates what users see in their "For You" feed, has been open-sourced on GitHub (under the AGPL-3.0 license), allowing developers to inspect how content is prioritized.

X for Professionals: Jobs and Communities

Broadening its scope beyond social networking, X has introduced features that directly compete with LinkedIn and specialized forum sites.

X Jobs

Verified Organizations on X can now list job openings directly on their profiles. Users can search for roles based on location and industry, and even apply using their X profile as a digital resume. This feature leverages the platform's high concentration of tech and media professionals.

Communities

Communities allow users to escape the "main character" nature of the general timeline and engage in focused discussions. Whether it is a community for crypto enthusiasts, sports fans, or local news, these groups provide a space for niche interests. Moderators within these communities have the power to set specific rules and curate the environment.

Historical Milestones: From Jack Dorsey to Elon Musk

To understand what X is today, one must look at the timeline of its evolution.

  • 2006: Jack Dorsey sends the first tweet: "just setting up my twttr."
  • 2007: The platform gains massive popularity at the SXSW festival.
  • 2012: Twitter reaches 100 million active users.
  • 2017: The character limit is doubled from 140 to 280.
  • 2022 (October): Elon Musk completes the $44 billion acquisition.
  • 2023 (July): The rebranding to X is announced, and the bird logo is retired.
  • 2024 (May): All Twitter domains are fully migrated to x.com.
  • 2025 (March): xAI acquires X Corp, and Linda Yaccarino steps down as CEO shortly after.

The platform's valuation has fluctuated significantly during this period, but its influence on global discourse remains unparalleled.

Summary of the Current State of X

As of late 2025, X is a platform in a state of constant iteration. It has moved away from the "legacy" verification system and toward a subscription-driven revenue model. It has integrated AI at a deep architectural level and expanded into video and professional services. While critics point to the challenges of content moderation and the spread of unverified information, the platform's proponents highlight its commitment to free speech and rapid innovation.

For the average user, the experience of visiting twitter.com is now a gateway to a multi-functional hub where the line between social media and artificial intelligence is increasingly blurred.

Frequently Asked Questions

Is my old Twitter account still active on X?

Yes, all existing Twitter accounts, followers, and historical posts were automatically migrated to X. You can log in using your original credentials at x.com.

Do I have to pay to use X?

The basic version of X remains free to use. You can post, read content, and follow users without a subscription. However, features like the blue checkmark, post editing, and Grok AI require an X Premium subscription.

Why is it still called Twitter in some places?

While the official name is X, the term "Twitter" is still deeply embedded in popular culture and some legacy URLs. It takes time for search engines, third-party websites, and user habits to fully transition to the new terminology.

How can I get verified on X now?

Verification is now part of the X Premium service. To get the checkmark, you must subscribe to the Premium or Premium+ tier and meet the platform's eligibility criteria, which include having a profile photo, an active phone number, and a non-deceptive account.

What is the difference between a Post and a Tweet?

Technically, they are the same thing. "Post" is simply the new official terminology used by the X platform to replace the word "Tweet." Similarly, "Repost" has replaced "Retweet."

Can I still use the Twitter bird logo?

The blue bird logo has been officially retired and replaced by the X logo. For branding and marketing purposes, the company requires the use of the new X iconography.

How does the Grok AI chatbot work?

Grok is available to Premium+ subscribers. It uses the latest data from the X platform to answer questions, summarize news, and provide insights. It is designed to be more informal and "rebellious" than other AI models like ChatGPT.

Is X available on mobile devices?

Yes, the X app is available for download on the Apple App Store and Google Play Store. If you already had the Twitter app installed, it should have automatically updated to the X app.