Newest AI models explained: Gemini, GPT-6, Claude (Nov 2026)

In short

Autumn 2026 brought a new generation of AI models from all three of the big Western AI labs. As of 9 November 2026:

Google's newest frontier model is Gemini 4 Argon, released on October 13. It is aimed at deep, complex work and is available in the Gemini app to paying Google AI Pro and Ultra subscribers.
OpenAI released the GPT-6 family in September and October. Its newest general model, GPT-6.1 Terra, is fast and good at operating a computer and writing clearly. Free ChatGPT users get GPT-6 Luna.
Anthropic's newest model is Claude Opus 5.5, released on September 22, followed by the faster Claude Sonnet 5.5 and Claude Haiku 5.5. Free Claude users get Sonnet and Haiku models.

The flagship models are on paid plans of about 20 US dollars a month. Every company still offers a capable free tier, which is where most people should start.

Why there are so many model names

Each company now sells a family of models rather than one. The pattern is similar everywhere:

A large flagship for the hardest problems: long research, complex code, careful analysis. Slower and more expensive to run.
Mid sized models for everyday work. Fast enough for chat, smart enough for most tasks.
Small, fast models that are cheap to run. These often power free plans and quick features.

When you see a new name, the useful question is not "is this the smartest model ever?" but "which tier is this, and does my plan include it?" That decides how good the answers are, how quickly they arrive, and how many questions you can ask before hitting a limit.

Google: Gemini 4 Argon

Google announced Gemini 4 Argon on October 13, 2026, describing it as its latest frontier model. Google says it is built for deep work on complex, real world tasks in areas such as coding, finance, law, cybersecurity and science, and that it is especially strong at understanding documents that mix text, images and charts.

Where you can use it: in the Gemini app and in AI Mode in Google Search, for Google AI Pro and Ultra subscribers. Google AI Pro costs 19.99 US dollars a month, and Ultra starts at 99.99 dollars a month.

What free users get: Google's subscription page lists a Flash-Lite model for the free Gemini plan. That is a smaller, quicker model, fine for everyday questions but not the flagship.

Good fit if: you already live in Gmail, Google Docs and Android, because Gemini is built into those products.

OpenAI: the GPT-6 family

OpenAI's lineup changed quickly this autumn, so the names can be confusing. Here is what OpenAI's own pages say:

GPT-6 Astra is OpenAI's most capable model and the headline model of the ChatGPT Pro plan. OpenAI says it and GPT-6.1 Sol remain the better choice for the most complex coding tasks.
GPT-6.1 Sol is an upgrade to GPT-6 Sol that OpenAI says nearly matches Astra for professional work such as writing and debugging code, understanding documents and multi step business tasks. It is available to paid ChatGPT plans, not the free plan.
GPT-6.1 Terra, introduced in late October 2026, is the newest. OpenAI describes it as a fast, efficient model that combines detailed visual reasoning and precise computer use with clearer, more natural writing. OpenAI says it completes tasks more than three times faster than Astra and Sol. It is available on Plus, Pro, Enterprise and Edu plans.
GPT-6 Luna is the model on the free and 8 dollar Go plans. On October 7, OpenAI also rolled out Intelligent UI, which lets ChatGPT answer with interactive visuals and small tools instead of only text.

OpenAI also announced GPT-6 Cyber on November 5, a specialized model for cybersecurity work. It is not aimed at everyday users.

Prices: ChatGPT Go is 8 US dollars a month, Plus is 20 dollars, and Pro starts at 100 dollars.

Good fit if: you want the widest range of features in one app, or you already use ChatGPT at work.

Anthropic: Claude Opus 5.5 and friends

Anthropic released Claude Opus 5.5 on September 22, 2026. Anthropic says it leads in agentic coding, computer use and knowledge work, meaning long, multi step jobs such as research, financial analysis and large software projects, and that it costs 40 percent less to run than the previous Opus on typical workloads.

Two smaller models followed: Claude Sonnet 5.5 on September 28, which Anthropic says is more than 30 percent faster than Sonnet 5, and Claude Haiku 5.5 on October 7, its fastest small model.

Anthropic also has Claude Fable 5.1, a top model for developers and businesses through its API and cloud partners, and Claude Mythos 5.1, the same underlying model with different safeguards, which is restricted to vetted organizations in cybersecurity and life sciences. Most people will not use either directly.

Where you can use Opus 5.5: Claude Pro, Max, Team and Enterprise plans. Pro costs 20 US dollars a month (17 dollars a month billed yearly), and Max starts at 100 dollars.

What free users get: Anthropic's pricing page lists Sonnet and Haiku models on the free plan, but not Opus.

Good fit if: you do a lot of writing, research or long documents, or you want help with coding.

Side by side

Company	Newest flagship	Released	What it is known for	Free plan model	Main paid plan
Google	Gemini 4 Argon	Oct 13, 2026	Complex tasks, documents mixing text and images	Flash-Lite model	Google AI Pro, 19.99 dollars a month
OpenAI	GPT-6.1 Terra (newest); GPT-6 Astra (most capable)	Late Oct 2026	Speed, computer use, natural writing	GPT-6 Luna	ChatGPT Plus, 20 dollars a month
Anthropic	Claude Opus 5.5	Sep 22, 2026	Coding, computer use, long knowledge work	Sonnet and Haiku models	Claude Pro, 20 dollars a month

Prices are US list prices from each company's pricing page on 9 November 2026 and can vary by country and tax.

What the free plans are good for

You do not need a flagship model for most everyday tasks. The free tiers from all three companies handle these well:

Explaining a confusing letter, bill or terms and conditions in plain words.
Drafting and polishing emails, cover letters and short messages.
Summarizing an article or a meeting transcript you paste in.
Brainstorming gift ideas, meal plans or trip itineraries.

The flagship models earn their price on harder work: long reports built from many documents, careful data analysis, or substantial coding projects. Free plans also come with tighter usage limits, so heavy users hit a wall sooner.

How to choose, in four steps

Start free. All three free tiers handle everyday questions, emails, summaries and explanations well. Use them for a week before paying.
Match the app to your tools. If you use Google services all day, try Gemini first. If your workplace uses ChatGPT or Claude, learning the same app at home pays off.
Test on your own tasks. Give each app the same three real jobs, for example rewriting a letter, summarizing a long document and explaining a bill. Keep the one whose answers you trust most.
Pay only when you hit a limit. Upgrade when the free tier keeps running out or a task clearly needs the flagship model. Our guide to using AI tools for your career has ideas for practical tasks to test.

What is still uncertain

Rankings change constantly. Each company publishes tests where its own model leads, and independent leaderboards shift every few weeks. Treat any "best model" claim with caution, including ones you see in ads.
Some reported models are not official yet. You may see other model names in news and social media posts. We only list models announced on the companies' own websites.
Plans and limits change. Usage limits on free and paid plans are adjusted often. Check the pricing page before you subscribe.

Common mistakes

Paying for the top tier on day one. Most people do not need more than the 20 dollar plan, and many are fine on the free plan.
Trusting answers without checking. Every model still makes confident mistakes. Verify facts, figures and anything medical, legal or financial with a primary source.
Pasting private information. Check whether your chats are used to train the AI and what your chatbot remembers about you before sharing personal details.
Assuming a familiar voice or face is real. The same technology can be misused for fraud. Our breakdown of the Arup deepfake video call shows how.

The short version

The newest models are Gemini 4 Argon, the GPT-6 family led by GPT-6.1 Terra and GPT-6 Astra, and Claude Opus 5.5. They are on paid plans. Start with a free tier, test it on your own everyday tasks, and upgrade only when you clearly need more.

Frequently asked questions

What is the newest AI model from each big company in November 2026?

Google's newest frontier model is Gemini 4 Argon, released October 13, 2026. OpenAI's newest general model is GPT-6.1 Terra, introduced in late October 2026. Anthropic's newest is Claude Opus 5.5, released September 22, 2026, alongside Claude Sonnet 5.5 and Claude Haiku 5.5.

Which of the newest AI models can I use for free?

None of the flagship models are on the free plans. Free ChatGPT includes GPT-6 Luna, free Claude includes Sonnet and Haiku models, and the free Gemini plan uses a Flash-Lite model, according to each company's pricing page.

How much does it cost to use the top models?

The main paid plans cost about 20 US dollars a month: ChatGPT Plus is 20 dollars, Claude Pro is 20 dollars, and Google AI Pro is 19.99 dollars. Higher tiers with bigger usage limits start around 100 dollars a month.

Which AI model is the best?

There is no single best model. Each company publishes tests where its model leads, and results change every few weeks. For everyday questions and writing, any of the main paid models is capable. Pick the app that fits the tools you already use and test it on your own tasks.

Why do AI companies release so many models with different names?

Each company offers a family: a large model for hard problems, mid sized models for everyday work, and small fast models that are cheap to run. The names tell you which tier you are using, which affects quality, speed and usage limits.

The newest AI models from Google, OpenAI and Anthropic, explained plainly (November 2026)