Welcome to the forefront of conversational AI as we explore the fascinating world of AI chatbots in our dedicated blog series. Discover the latest advancements, applications, and strategies that propel the evolution of chatbot technology. From enhancing customer interactions to streamlining business processes, these articles delve into the innovative ways artificial intelligence is shaping the landscape of automated conversational agents. Whether you’re a business owner, developer, or simply intrigued by the future of interactive technology, join us on this journey to unravel the transformative power and endless possibilities of AI chatbots.
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ChatGPT still draws the biggest crowd. Similarweb’s September 2026 data puts it at 56.4% of global AI-assistant website visits, ahead of Gemini at 25.0%, Claude at 9.6% and Grok at 2.3%. That ranking tells you who is popular. It does not tell you which is the best AI chatbot for the job on your screen today, and in Australia the question got harder this autumn because all four vendors have shipped or updated flagships.
This guide compares the four on the things Australians actually search for: what each one does best, what the newest model costs, which plan unlocks it, and what it takes to switch. We stick to figures we could verify against vendor pages and named research, and we say plainly where the public record runs thin. If you want raw model-versus-model numbers, our head-to-head test of Claude Opus 5.5, GPT-6.1 Sol and Gemini 4 Argon covers that ground. This piece is about choosing the product, not the model card.
Prices below are in US dollars because that is how the vendors publish them. We did not find verified Australian-dollar prices for the consumer plans, so check the checkout page before you pay and expect card fees on top.
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For most people, ChatGPT is the best AI chatbot to start with. It has the largest audience, the newest OpenAI model on its paid tiers (GPT-6.1 Sol on Plus and above), a free plan that now runs GPT-6 Luna, and the widest set of plan options from free up to US$500 a month. If you only want to pay for one assistant and have no strong reason to pick another, that is the safe default.
The default breaks down once your work has a clear centre of gravity. Developers who live inside agent tools tend to get more from Claude Opus 5.5 or GPT-6.1 Sol in Codex. People who already run their day through Google Search, Android and Workspace get the most from Gemini 4 Argon, which reached general availability on 13 October 2026. Heavy users of X, or teams that want a cheap API with a large context window, have a reason to look at Grok 4.7.
Here is the scorecard in one view, before we get into the evidence.
One caution about the word “best”. Every vendor changes models, limits and plan names on a weekly rhythm right now. A ranking that held in September can be wrong by November, so treat this page as a dated snapshot (24 October 2026) and use the test in the later section to confirm the pick on your own work.
We built a current-facts sheet on 24 October 2026 from vendor pages fetched that day (OpenAI, Google, Anthropic and xAI) and from recency-filtered research. Every model name, date and price in the tables below comes from lines that appeared on a fetched page and in that research. Claims that surfaced only once are written as “reportedly” in running text and kept out of the tables.
We compared the newest model in each product line rather than last season’s. That means GPT-6.1 Sol rather than GPT-5.6, plus Gemini 4 Argon, Claude Opus 5.5 and Grok 4.7. Where we mention an older model, it appears only as a predecessor.
There is a limit we should state up front. As of this writing we could not find one independent test that scored all four newest models on the same prompts, so we do not publish a made-up leaderboard. Instead the benchmark section lays out what each vendor claims, what independent traffic and survey data show, and where each source stops being useful. For a narrower accuracy question, our test of Perplexity, ChatGPT and Gemini answer errors shows how to measure it yourself.
Our criteria, in order of weight:
The table below lines up the four products as they stood on 24 October 2026. “Not named in sources” means the pages we verified did not say, and we chose a blank over a guess.
Two details deserve a second look. First, the newest model is not always the model in the box. GPT-6.1 Sol is aimed at ChatGPT Work and Codex and, per OpenAI’s pricing page, is available on Plus but not on Free or Go. Second, Claude and Gemini both ship a lineup rather than a single model, so “Claude” in a casual chat may mean Sonnet 5.5, not Opus 5.5.
OpenAI has had the busiest autumn of the four. It introduced GPT-6 in ChatGPT on 7 October 2026 with a feature it calls Intelligent UI, rolling out first to Plus, Pro, Business and Enterprise, then to Free and Go on 8 October. Paid tiers run GPT-6 Sol. Free and Go run GPT-6 Luna. OpenAI also released GPT-6.1 Sol for ChatGPT Work and Codex, starting with Pro users and expanding to Plus, Business, Enterprise and Edu.
Intelligent UI lets a reply mix text, visuals and interactive elements, and a response can start streaming while ChatGPT is still working on the rest. In daily use that matters for charts, comparison tables and small calculators, which now appear inside the chat instead of arriving as a wall of text.
OpenAI’s own page describes GPT-6.1 Sol as delivering “near-Astra intelligence for coding, computer use, and professional work” at one-fifth of GPT-6 Astra’s standard API input and output token prices. The page gives no benchmark score in the material we verified, so read that as a price-for-capability pitch, not a measured result. The plan structure also changed. OpenAI now lists a Pro 500 tier at US$500 a month. Reportedly, Pro 100 and Pro 200 tiers sit below it, and eligible existing Pro 200 subscribers kept their earlier allowance through 29 October 2026 at an unchanged US$200 a month. If you are on Pro 200, that date is five days away.
Reports from the week of 20 October also describe a Locked Chats feature, which protects individual chats behind a PIN or device biometrics on most plans. We could not confirm it on a second source, so treat it as reported and look for it in your settings before you rely on it.
The free experience and the paid experience now differ by a full model tier, and the pricing page marks GPT-6.1 Sol as unavailable on both Free and Go. If a colleague on Plus shows you a result you cannot reproduce on Free, that gap is the reason. For Australians weighing the cheaper paid rung, our guide to setting up ChatGPT Go in Australia explains what that tier does and does not include.
The other weak spot is naming. Between Luna, Sol, Astra, Work, Codex and the Pro tiers, even regular users struggle to say which model answered. Check the model picker, and when a task matters, choose the model deliberately instead of trusting the default.
Google moved Gemini 4 Argon from a limited cyber-defence release to global availability on 13 October 2026. It reached trusted cyber defenders first through Google’s Fairwind Program, then opened up to developers and enterprises through the Gemini API and Google AI Studio. Consumers get it in the Gemini app and AI Mode in Search if they hold a Google AI Pro or Google AI Ultra subscription. Ultra subscribers also get it in Google Antigravity, Google’s agentic coding tool.
Google’s own Gemini 4 Argon announcement says the app now gives more direct answers, hedges less, repeats itself less and reports clearer progress on long tasks. Anyone who has watched a chatbot pad a three-line answer into three paragraphs will see why that list matters. Google also added a task toggle to the main chat, so Pro and Ultra subscribers can ask Gemini to carry out tasks, and it brought Antigravity’s coding interface into the Gemini macOS app so you can switch between plain chat and coding in one window.
Gemini’s biggest advantage is distribution, not a single feature. If you already use Google Search, Android and Workspace, Argon lands where you work, and AI Mode puts a frontier model one tap from a search box. Google also announced new business-oriented Gemini features on 21 October, including a business landing page, marketing and finance skills and more app integrations, with a global rollout starting. Our look at Copilot, Gemini and Meta AI usage shows how much of Gemini’s reach comes from that built-in placement.
Two caveats apply. The newest model sits behind a paid Google AI plan in the app, and the cheap API price is temporary. Google priced Argon at US$2 per million input tokens and US$10 per million output tokens as an introductory rate, with cached input at 95% off. After the introductory period ends on 30 November 2026, the price becomes US$4 and US$20 respectively. Anyone budgeting a product around Argon should model the higher figure.
Anthropic’s current lineup is Claude Opus 5.5, Claude Sonnet 5.5 and Claude Haiku 5.5, all listed on its newsroom as of 24 October 2026. Anthropic describes Opus 5.5 this way: “Claude Opus 5.5 leads in agentic coding and knowledge work, and costs 40% less to run than Opus 5 on typical workloads.” Sonnet 5.5 is “a clear upgrade over Claude Sonnet 5, runs 30%+ faster, and costs up to 30% less for most work.” Haiku 5.5 is the company’s “fastest, most capable small model”, aimed at summarisation, subagents and browser use.
These are vendor claims measured against Anthropic’s own earlier models, so they say little about how Claude compares with ChatGPT or Gemini. What they do show is a clear strategy: Opus for the hardest agentic work, Sonnet for the everyday tier, Haiku for volume. For a plain price-and-quality comparison with the traffic leader, see our Claude versus ChatGPT pricing and benchmarks piece.
Claude’s pricing page adds a few details worth knowing. Opus 5.5 has a fast mode that delivers up to 2.5x faster speeds at 2x standard pricing, and batch processing saves 50%. For researchers, Anthropic offered verified principal investigators a Team subscription where Standard seats are free for research teams and Premium seats cost US$15 per month for up to one year. That offer targets academia, but it signals where Anthropic is spending to win users. Anthropic also says preserved thinking arrived with Claude Fable 5.1 and Claude Opus 5.5 for new API accounts created on or after 31 August 2026.
Reportedly, Anthropic also published an updated Usage Policy that takes effect on 12 November 2026. That item was not confirmed on a second source, so read the policy before the date if you build on Claude. Claude’s weak spot for ordinary readers is breadth. Its share of web visits sits at 9.6%, so you will find fewer guides, templates and colleagues who can help than you will for ChatGPT.
xAI’s Grok 4.7 became available through the xAI API on 21 September 2026, following Grok 4.6 on 12 August. xAI’s release notes call it a frontier model for coding, agentic tasks and knowledge work, and the API identifier is grok-4.7. Reportedly it carries a 500,000-token context window and accepts text and image input with text output. Secondary reports put the price at US$2 per million input tokens and US$6 per million output tokens for prompts under 200,000 tokens, with higher rates above that threshold. Check xAI’s release notes and pricing page before you commit, because those figures come from reporting rather than a dated launch post.
On the consumer side, xAI lists subscription tiers with progressively larger included usage, and its pricing page shows an Ultra tier at US$200 a month or US$2,000 a year. The brand mix is getting crowded. Grok is the assistant, Grok Build is the coding tool, and a separate product called Grok Bot is also reported.
The case for Grok is narrower than for the other three. It is the natural pick if you live on X and want an assistant wired to posts and trends, and it is a serious option for developers who care about API price. The case against is safety and content handling, which differ a lot between vendors. Our content filter test of Grok, ChatGPT and Claude shows how large the gap in jailbreak rates can be, and that matters if you deploy a chatbot to staff or customers.
Share of use is the other limit. Grok holds 2.3% of global AI-assistant web visits in the Similarweb data, so the ecosystem of tutorials and integrations is thin next to ChatGPT’s. xAI’s own page does cite a third-party check. LatchBio evaluated Grok 4.6 on biosecurity monitoring and adversarial biological tasks and found it detects and refuses dangerous queries more reliably than any other frontier system. That is an evaluation of the previous model, quoted by the vendor, so weigh it accordingly.
The table below collects every number we could verify, labelled by who produced it. Notice how few of them measure answer quality head to head. Most measure price, speed relative to a previous model, or audience size.
Stack Overflow’s press release on its survey states the usage split directly: “In Stack Overflow’s 2025 Developer Survey, 81% of developers reported using OpenAI GPT models, 43% reported using Claude Sonnet models, and 35% reported using Gemini Flash models.” Read that as a 2025 snapshot of developer habits, not a verdict on today’s models, since each vendor has shipped at least one new generation since.
Similarweb’s 2026 report gives the freshest view of who wins attention. Its summary of the September numbers reads: “Similarweb reported that ChatGPT accounted for 56.4% of global AI-assistant website visits in September 2026, followed by Gemini at 25.0%, Claude at 9.6%, and Grok at 2.3%.” The sums matter. ChatGPT and Gemini together hold 81.4% of visits, so the real contest is two large players and two focused challengers.
What the data cannot tell you is who answers your questions best. Quality depends on the task, the prompt and the settings you choose, which is why the test later in this guide matters more than any ranking. For one specific agentic job, our comparison of ChatGPT, Gemini and Grok on AI checkout shows how the same vendors diverge on a real task.
Pricing is where the four products look least alike. ChatGPT and Grok publish clear consumer ladders. Google ties Argon to its AI Pro and Ultra subscriptions and prices the API by the token. Anthropic spreads its prices across plans and usage modes. The table lists only prices and discounts we could verify on vendor pages, and the ChatGPT pricing page is the one to check for plan-by-model availability.
Some prices did not clear our bar. OpenAI’s pages show Go and Plus as paid plans without a visible dollar figure in what we could verify, and the same is true for Google AI Pro and Ultra and for Claude’s individual plans. Rather than quote a number from memory, we recommend opening each pricing page and screenshotting the Australian price before you subscribe. Check whether the price includes GST and whether your card adds a foreign transaction fee.
Two bits of arithmetic show how much the fine print matters. Grok Ultra costs US$200 a month, or US$2,400 over twelve months, against US$2,000 on the annual plan. That is a US$400 saving, or about 17%, for anyone sure they will keep it all year. ChatGPT Pro 500 at US$500 a month adds up to US$6,000 over a year, which is a business expense, not a hobby.
For API users, picture a workload of 10 million input tokens and 2 million output tokens a month. On Gemini 4 Argon’s introductory price that costs US$40 (10 x US$2 plus 2 x US$10). After 30 November, the same workload costs US$80 (10 x US$4 plus 2 x US$20), so the bill doubles overnight. On the reported Grok 4.7 rates for short prompts, the same workload would come to about US$32 (10 x US$2 plus 2 x US$6). Those totals ignore caching, which cuts Gemini’s input cost by 95% on repeated context, so a workload that reuses a long system prompt can land far below the headline figure.
Two pricing traps are worth flagging. The first is Gemini’s introductory API rate, which doubles on the date noted above. The second is the high-end ladder: with Pro 500 at US$500 a month and Grok Ultra at US$200 a month, the premium tiers only pay off if you will use the extra allowance. For most individuals, the entry paid plan from any vendor delivers most of the value.
Product pages describe features. Case evidence shows what people do with them. The six examples below come from vendor and press material in our fact sheet, and each is labelled by who made the claim.
Patterns emerge. The Claude examples cluster around large organisations and developer tooling, which fits Stack Overflow’s 2025 finding that 45% of professional developers used Claude Sonnet models, against 30% of developers learning to code. The Grok examples lean on operational and safety claims. Google’s example is about builders and creative tools. OpenAI’s strength, per the traffic data, is the broadest ordinary use rather than any one named customer.
Use this table as a starting point, then confirm with the test in the next section. We name a first choice and a fallback for each job.
Small business owners should read the recommendation through a cost lens. A sole trader who drafts quotes and emails is well served by a mid-tier plan on any of the four. The bigger decision is whether you need an assistant that connects to your tools, in which case the surrounding ecosystem (Google Workspace, Microsoft or X) should drive the choice. Our deeper guide to the best AI chatbot for small business in Australia covers that scenario in more detail.
These are composite sketches, not case studies, but they show how the table plays out.
Students and researchers should look at free tiers first, then at vendor academic offers. Anthropic’s research seats and OpenAI’s nonprofit discounts show that the vendors are courting these groups. Privacy-conscious users should read each vendor’s data controls, check whether chats can be locked or deleted, and keep sensitive material out of any consumer chatbot until they have read the terms.
A ranking from someone else cannot know your work. A short, repeatable test can. Pick ten prompts from the last month of your real tasks: two writing jobs, two summaries of documents you already know, two coding or spreadsheet jobs, two research questions with answers you can verify, and two messy requests that need clarification. Strip out names and private data before you paste anything into a consumer chatbot.
Run each prompt once on each chatbot, using the newest model your plan allows, and score every answer from 0 to 3 on correctness, usefulness and effort to fix. Do not change the wording between vendors. Write the model name next to each result, because the app’s default can change underneath you.
If you use the APIs, the harness below runs the same prompts through whichever providers you wire in. It is a template. Fill in each provider’s client and the model ID from its current documentation, because model IDs change.
Score the CSV by hand, blind if you can, by hiding the provider column. People are surprisingly loyal to a brand until the labels come off.
Switching costs more in habits than in data. These steps keep you from losing the work you built up.
Leaving ChatGPT for a rival is the most common move, and our guide to ChatGPT alternatives in Australia walks through that path with plan prices. The reverse move, from a niche tool to ChatGPT, is easier because the ecosystem of guides and templates is so large.
Here is our call as of 24 October 2026. Pick ChatGPT if you want one best AI chatbot for broad use. It leads the traffic data at 56.4% of visits, it has the newest OpenAI model on Plus and above, and its free plan is a legitimate starting point. Pick Gemini 4 Argon if Google already runs your day and you are willing to pay for AI Pro or Ultra. Pick Claude Opus 5.5 if your work is agentic coding or long knowledge tasks and cost per task matters. Pick Grok 4.7 if X integration or API price outweighs ecosystem size.
The numbers behind that call are simple. ChatGPT and Gemini together account for 81.4% of visits, which is why we call it a two-horse race for casual use. Claude’s 9.6% share understates its pull among professional developers, where Stack Overflow’s 2025 survey showed 43% of developers using Claude Sonnet models. Grok’s 2.3% share is small but not zero, and its API pricing is competitive on paper.
Three things would move the verdict. An independent head-to-head score that puts Claude Opus 5.5 or Gemini 4 Argon clearly ahead on everyday tasks would weaken the case for ChatGPT as the default. A permanent Argon API price near the introductory rate would make Gemini the value pick. And a confirmed Australian-dollar price cut on a mid-tier plan from any vendor would reshuffle the budget advice.
If you want more reading on the wider field, our AI and machine learning coverage tracks each vendor’s releases as they land. Re-run your ten-prompt test whenever a vendor ships a new flagship, since the picture above has already shifted several times this autumn.
For most people it is ChatGPT, because it combines the largest audience (56.4% of global AI-assistant web visits in September 2026), the newest OpenAI model on paid plans and a usable free plan. Gemini 4 Argon, Claude Opus 5.5 and Grok 4.7 each win specific jobs, as the use-case table shows.
Anthropic positions Claude Opus 5.5 for agentic coding, and OpenAI positions GPT-6.1 Sol for coding in ChatGPT Work and Codex. Google and xAI also target coding with Gemini 4 Argon in Antigravity and Grok 4.7 in Grok Build. We found no independent score that ranks all four, so test them on your own repository.
Yes. ChatGPT’s Free plan runs GPT-6 Luna, though GPT-6.1 Sol is not available on it. Compare the other free plans before you commit, since limits change often.
OpenAI lists a Pro 500 tier at US$500 a month. Reportedly, Pro 100 and Pro 200 tiers sit below it. Prices are in US dollars, so check the Australian checkout page for the final amount.
The introductory price of US$2 per million input tokens and US$10 per million output tokens runs until 30 November 2026. After that, Google lists US$4 and US$20 respectively.
Gemini 4 Argon is the most recent flagship, with global availability on 13 October 2026. GPT-6.1 Sol followed on 29 September for ChatGPT Work and Codex, and Grok 4.7 reached the xAI API on 21 September. Anthropic lists Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 as its current lineup.
The data is easy to export, and the habits take longer to rebuild. Move one workflow at a time, run both tools for a week and cancel on a set date.
Yes. All four vendors have shipped or updated flagship models this autumn, and two dated changes are already scheduled: the end of the Pro 200 grandfathered allowance on 29 October and the end of Gemini 4 Argon’s introductory price on 30 November. Re-test every time a vendor ships a new model.
Nadia Dubois is the AI & Innovation Editor at Tech Insider, where she tracks the rapid evolution of artificial intelligence, from foundation models to real-world enterprise deployment. She previously covered AI and startups for La Tribune and contributed to MIT Technology Review's European coverage. Nadia specializes in generative AI, AI regulation, and the intersection of technology and European industrial policy. She holds a dual degree in Computational Linguistics and Journalism from Sciences Po Paris.
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