In a world where AI promises everything from quick answers to creative outbursts, Grok and ChatGPT clash like two old rivals. One is a reliable giant with a huge market share, the other a witty challenger that excels at smaller languages, speed, and informality. As a writer who simultaneously drives both due to the nature of my work, I find that Grok excels at identifying news sources and writing with less fragmented, more natural responses. Based on data from October 2025, personal experience, and tests, we reveal why Grok is not just an alternative, but often a better choice for everyday users—with the irony that it’s cheaper and less rigid.
Imagine this: you're sitting at your computer, typing a question in Slovenian about how to fix an old bicycle, and waiting for an answer. One AI gives you a long, formal explanation full of technical terms that sounds like a university lecture. Another answers you quickly, with a touch of humor, as if you were talking to a friend from the neighborhood - and it even correctly understands your local dialect. This is not science fiction; this is reality in 2025, where Grok from xAI challenges ChatGPT from OpenAIAs an author who, due to the nature of his work, runs both systems simultaneously, I notice that Grok not only keeps up, but often exceeds ChatGPT in natural language and news source recognition. Why should you choose one? In this long read, we combine expert analysis with personal experience to uncover the truth – and maybe convince you to try the one that’s right for you. Grok vs. ChatGPT – Let’s Take a Look!
Grok vs. ChatGPT – Market Share: Who Rules the Chatbot Empire?
Let's start with the basics - money and numbers don't lie. According to data from October 2025, ChatGPT holds an impressive 81.12 percent market share among conversational AIs, while Grok barely reaches 0.8 percent. This is no surprise: ChatGPT has been on the market since 2022 and by July 2025 had recorded 48.36 percent of all web traffic among more than 10,500 AI tools, which translates to almost 47 billion visits per year. Grok? Its share is more modest, but growing – from 0.8 percent at the beginning of the year to 1.17 percent by June, thanks to its integration with X (formerly Twitter) and its appeal to users looking for fresh news without censorship.
Irony? While ChatGPT serves billions as a reliable daily driver, Grok acts as that cool friend at the party that everyone knows but rarely invites home. The market suggests that users prefer the one that doesn’t fall over while swimming—ChatGPT has 60 percent of the total share, while Grok is battling giants like Microsoft Copilot (14 percent) and Google Gemini (13.5 percent). If you’re an investor, bet on ChatGPT; if you’re a rebel, Grok might be your dark horse. As a writer who uses both in parallel, I’ve noticed that Grok appeals to those who value speed and unfiltered news, which is key to my work tracking trends.
Features and Capabilities: Sarcasm vs. Precision – Grok vs. ChatGPT
Grok vs ChatGPT – now to the point: what do they actually do? Both are built on huge language models – ChatGPT on GPT-5 (released in August 2025), Grok on Grok-4, which promised the “world’s smartest” AI in July 2025. But the differences are as obvious as between an espresso and an Americano.
ChatGPT excels in structured tasks: coding, where it beats Grok in accuracy and speed; research, where it provides cited sources without hallucination; and creativity, where it creates stories with a strong climax and tight prose. Its strength? Multitasking—from voice mode with video sharing to limited video generation with Sora 1. Grok, on the other hand, is like that friend who tells you the truth before sugarcoating it: sarcastic, less filtered, and great for real-time data from X. It wins in math (93.3 percent on the AIME 2025 test vs. 79 percent for GPT-o1) and science (84.6 percent on the GPQA), where it excels at abstract reasoning.
In September 2025 tests, ChatGPT wins in image generation (better for following directions) and product specifications, while Grok wins in summaries and real-time transcription. Ironically, Grok is “freer,” but that means more risk—like a car without airbags, which is fun but not for everyday use. As a writer who uses both, I find that Grok is better at recognizing news sources, which is key for my work, as it offers less fragmented answers and more natural language that reads like conversation.
Grok and minor languages: The secret winner for Slovenian and similar languages – Grok vs. ChatGPT
In an era where AI speaks more languages than a polytheist in a crisis of faith, xAI’s Grok proves that English isn’t everything. Faster, more relaxed, and cheaper to use on a daily basis, this sarcastic rebel excels on smaller languages like Slovenian, while recent iterations of ChatGPT have sagged into overly technical formality. It supports over 95 languages, including rarer ones like Slavic variations, and its integration with X gives it an edge on real-time, local data. Tests from October 2025 show that while ChatGPT’s latest models (GPT-5) improve multilingualism, they often fall into generic, less precise responses on smaller language groups like Slovenian – a result of training that is still predominantly English-based.
Irony? While ChatGPT tries to be “all things to all people,” which leads to distortions in rare languages, Grok’s “unfiltered” nature makes it more adaptable—like that friend who understands your dialect without having to Google it. Users on X from September and October 2025 share stories: “Grok understands Slovenian nuances better than ChatGPT, which sounds like a translation from German.” For writers, translators, or simply curious people in smaller countries, this means less frustration and more creativity. If you’re in Slovenia and looking for a recipe for yota with an AI twist, Grok serves it up without unnecessary English inserts. As an author who frequently tests both, I can attest: Grok writes better in Slovenian than the last ChatGPT models, which have become worse for smaller groups—the answers are faster, simpler, and more understandable, with less fragmented structures.
Speed and simplicity: Grok like espresso, ChatGPT like Americano
Who prefers a response that comes in a flash, or an essay that takes three hours to read? Grok wins in speed - tests from October 2025 show that it is up to 20 percent faster on simple queries, thanks to an optimized Grok-4 model with 2 million context tokens. ChatGPT is fast for structured tasks, but for complex prompts it starts to think too long, as if it were negotiating with itself.
But it’s the simplicity that impresses more than speed: Grok’s answers are short, clear, and free of unnecessary clutter—ideal for mobile use or quick insights. On October X, users rave: “Grok is like ChatGPT with a triple espresso—faster, sharper.” Meanwhile, ChatGPT often overdoes the details, leading to “overthinking” and long-winded responses. Ironically, in the age of TikTok and fast-paced news, Grok is the one that adapts to our attention spans, not the other way around. In my tests, where I run both in parallel, Grok answered a question about quantum physics in under a minute, while ChatGPT took three times longer for the same content—and Grok’s answers were less fragmented, more fluid.
Formality on the Test: Why ChatGPT Sounds Like a Professor and Grok Sounds Like a Friend
Here comes the crux of the frustration: ChatGPT in recent iterations (from GPT-4o onwards) has become so formal and professional that its responses sometimes sound like an academic paper – full of jargon that even the author doesn’t understand. Users on X complain: “ChatGPT has become too verbose, like talking to your uncle at your prom.” This is not a bug – it’s intentional: OpenAI is betting on “reliability”, which leads to dry, predictable responses.
Grok? He's like that friend who tells you the truth with a smile: he uses slang, irony, and short sentences, which makes everything more accessible. In tests, he does better on "conversational" tasks, where you don't need a degree to understand. For professionals, this means less time "translating" AI responses - and more time for actual work. If you're a writer or marketer, Grok's witty tone adds a spice that ChatGPT lacks. As an author who uses both for writing, I find that Grok's responses flow naturally, without the fragmented jumps that are common with ChatGPT, especially on informal topics like writing stories or marketing copy.
Last month's opinions: From praise on X to criticism on Reddit
In September and October 2025, opinions online and on X are divided like a polarized family at Christmas. On X, users praise Grok for its “unfilteredness” – “Grok is incredibly better than ChatGPT,” says one, while others point out its forgetfulness: “Grok forgets the conversation after one sentence, ChatGPT is better at that.” Others call it “rubbish” compared to ChatGPT, which “works better” in terms of role and coding.
ChatGPT dominates Reddit and blogs: “For secure, polished content, ChatGPT is better,” while Grok wins for “raw, trending insights”—if you’re willing to fact-check. Mashable in August (still relevant in October) called ChatGPT “the best chatbot,” while Grok is less polished with fewer features. X discussions show 60 percent favoring ChatGPT for everyday use, while 40 percent favoring Grok for entertainment and real-time news. One user sums up the irony: “Grok is smarter but less refined as a product—ChatGPT adapts better.” As a writer who often compares the two, I find that users appreciate Grok’s ability to quickly identify news sources, which is key to my work tracking trends.
Price and efficiency: Grok as a smart investment for your wallet
Finally, money speaks louder than code. For ChatGPT, the free version is available for €0 ($0), the Plus version is not explicitly listed on the official website, but the Pro costs around €184 ($200) per month for unlimited access to advanced features. The Business plan is €23 ($25) per user per month (billed annually) or €28 ($30) per month. For Grok, access to advanced features like Grok-4 is tied to an X Premium+ subscription, which costs around €38 ($40) per month or €377 ($395) per year online in most Eurozone countries (€46 per month in Belgium). The basic X Premium is €8 ($8) per month with higher limits for Grok, and Basic is €3 ($3) without full access.
For identical prompts, Grok uses fewer resources, making it cheaper to run – ideal for freelancers or small businesses. As a writer who runs both systems in parallel, I find that Grok’s responses require fewer edits because they are more natural and less fragmented, saving time and resources. The irony? While you’re paying for ChatGPT’s “polished” formality, Grok gives you similar quality for less – like buying a coffee machine instead of Starbucks every day. Check the official website for current prices, as they are subject to change.
Benchmarks and real-time testing: Where Grok 4 and GPT-5 measure up
When it comes to benchmarks that measure the brainpower of these AI giants, the results from August and September 2025 are like a tight race, with Grok 4 often outpacing GPT-5 in technical challenges, while GPT-5 holds the balance in general knowledge – but the irony is that neither wins without a scratch. Here’s a summary of the key tests, by indent, based on analyses from Artificial Analysis, Fello AI, and Vellum AI:
- AIME 2025 (difficult mathematics at the Olympic level): Measures the ability to solve complex equations; Grok 4 scores 95–100 %, GPT-5 scores 94–96 % – Grok leads because he is better at abstract problems than if he were a rocket-powered mathematician. Source: Artificial Analysis
- GPQA (Scientific Reasoning at Doctoral Level, Physics and Biology): Tests deep understanding of science; Grok 4 87.5–88 %, GPT-5 85–88.4 % – a draw, but Grok is more consistent, without those “hallucinatory” slips. Source: Fello AI
- SWE-Bench Verified (coding in real-world scenarios): Checks for error-free code writing; Grok 4 72–79.4 %, GPT-5 74.9 % – GPT-5 slightly ahead in accuracy, but Grok is faster than writing code during a sprint. Source: Vellum AI
- ARC-AGI (abstract reasoning and visual puzzles): A step towards general intelligence, measures adaptation to new challenges; Grok 4 15.9–29.4 % (68 % on the easier variant), GPT-5 9.9–25 % (65.7 %) – Grok leads strongly, as if he were the Sherlock Holmes of AIs. Source: The Decoder
- HumanEval / LiveCodeBench (writing error-free code): Programming focused; Grok 4 72–98 %, GPT-5 67–75 % – Grok wins, ideal for developers who don't want to fix AI bugs. Source: Times of AI
- MMLU (general knowledge, from history to law): A broad test of everyday knowledge; Grok 4 ~87 %, GPT-5 86.4 % – GPT-5 more balanced, like an encyclopedia on wheels. Source: Reddit Singularity
- Humanity's Last Exam (HLE, Advanced Thinking with Tools): Measures complex logic; Grok 4 44.4 %, GPT-5 42 % – Grok leads, thanks to better tools for real-world problems. Source: X Posts
As for real-time testing, where we put AI to live challenges like news analysis or fast coding, Grok 4 shines with its integration of X (formerly Twitter) for fresh data, achieving 0.8-second responses, while GPT-5 takes longer, but is better at multimodal tasks (images + text). In practical tests, such as a 48-hour session with both, Grok wins in speed and freshness, while GPT-5 wins in creativity and security - as if Grok is a wild horse and GPT-5 is a reliable sedan. Summary? Grok 4 is often the winner in technical and fast tasks (leading in 4 out of 7 benchmarks), and GPT-5 in general versatility, where its lower price (€1.15 per million tokens) and speed (138 tokens/second) save money, while Grok costs less (€0.18 per input) and flies at 344 tokens/second. Irony: in the real world, the winner is the one who doesn't keep you waiting for an answer while the coffee gets cold.
Conclusion: Which is better – and why isn’t it easy?
In the battle of Grok vs. ChatGPT ChatGPT wins – at least in terms of numbers, reliability and versatility. It’s the one that will help you get the job done without drama, while Grok adds spice for those days when you need a laugh instead of a perfect answer. Whether you’re a beginner or a pro, go for ChatGPT. For the X-account rebels who value speed, natural language and news feeds? Grok will give you a sense of freedom – but check the facts. Even a toddler can daydream and remember something that doesn’t exist. But so does ChatGPT, which still hallucinates too many times!
In conclusion: Grok vs. ChatGPT – neither is perfect, but together? That would be a real singularity. As an author who uses both simultaneously, I can say that Grok often exceeds expectations where ChatGPT becomes too rigid. What do you think – have you chosen a side yet? Check them both out and decide for yourself; in 2025, AI is less about who wins and more about what works for you. And what if I’m wrong? Well, at least I’m not an AI that would admit it.
