Fello AI Blog

Lenka Vojtechova

Lenka is a content creator and digital marketing specialist with a passion for technology, AI, and storytelling. She combines creativity with a data-driven mindset to craft engaging, meaningful content that connects with readers. With experience across SEO, copywriting, and social media strategy, she helps brands turn complex ideas into clear, relatable messages. When she’s not writing, you’ll find her exploring new AI tools, enjoying a great cup of coffee, or planning her next travel adventure.

Claude Opus 5.5 Is Here: Price, Benchmarks, and Who Actually Gets It
KI-News

Claude Opus 5.5 Is Here: Price, Benchmarks, and Who Actually Gets It

Anthropic released Claude Opus 5.5 on September 22, 2026, the first model in a new Claude 5.5 family. It does the work of Fable 5.1 at 40% less cost than Opus 5…

Grok 4.7: What Changed, What It Costs and Whether to Upgrade
KI-News

Grok 4.7: What Changed, What It Costs and Whether to Upgrade

SpaceXAI released Grok 4.7 on 21 September 2026 at exactly the price Grok 4.6 cost, $2 per million input tokens and $6 per million output tokens. The token price…

Does Gemini Have a Limit? Gemini Usage Limits Explained
KI-Grundlagen und Anleitungen

Does Gemini Have a Limit? Gemini Usage Limits Explained

Does Gemini have a limit? Yes, but since May 17, 2026 it is no longer a number of prompts. Gemini meters compute, refreshes every five hours and publishes…

Perplexity vs Gemini: Which One Actually Deserves Your $20?
KI-Grundlagen und Anleitungen

Perplexity vs Gemini: Which One Actually Deserves Your $20?

Perplexity vs Gemini is not the fight the comparison pages describe. Perplexity already runs a Gemini model on its paid plans, so the question is not which one is…

AI for Seniors: How to Set It Up for a Parent Who Will Not Troubleshoot
KI-Grundlagen und Anleitungen

AI for Seniors: How to Set It Up for a Parent Who Will Not Troubleshoot

Most guides to AI for seniors are written for the senior. This one is written for you, the person who will get the phone call when it stops working.

Is DeepSeek Free? Why There Is No Paid Plan to Upgrade To
KI-Grundlagen und Anleitungen

Is DeepSeek Free? Why There Is No Paid Plan to Upgrade To

DeepSeek’s chat and app cost nothing, and there is no paid consumer tier to upgrade to. The word “free” does not appear once on DeepSeek’s only pricing page, and…

How to Delete Images From ChatGPT Library (and What It Actually Removes)
KI-Grundlagen und Anleitungen

How to Delete Images From ChatGPT Library (and What It Actually Removes)

There is no delete button on a generated image in the ChatGPT library. OpenAI still documents one method: delete the whole conversation the image came from. But…

AI Safety Incidents in 2026: The Running List
KI-News

AI Safety Incidents in 2026: The Running List

The most serious AI safety incidents of 2026 did not happen in the wild. They happened inside the labs’ own testing, and the UK government has now published the…

AI Tattoo Cover Up Generator: What It Cannot See on Your Skin
KI-Grundlagen und Anleitungen

AI Tattoo Cover Up Generator: What It Cannot See on Your Skin

An AI tattoo cover up generator will hand you a design in about twenty seconds. Upload a photo of the tattoo you regret, pick a style, and the tool returns a stack…

Claude Prompts: 30 That Work, and Why They Work on Claude
Prompt Engineering

Claude Prompts: 30 That Work, and Why They Work on Claude

Most Claude prompt lists are ChatGPT prompts with the name swapped. Claude rewards a different shape: tagged structure, three to five examples, and your documents…

Jev and System One Models: The AI That Answers in Numbers, Not Words
Technische KI-Einblicke

Jev and System One Models: The AI That Answers in Numbers, Not Words

A new AI lab says its model is 444 times cheaper than an LLM and cannot hallucinate. Its own documentation and two independent tests tell a more useful story about…

DeepSeek vs Grok: Cost, Limits and What Each One Refuses
KI-Grundlagen und Anleitungen

DeepSeek vs Grok: Cost, Limits and What Each One Refuses

DeepSeek is far cheaper and better at structured reasoning. Grok costs more and answers far more questions. The real difference is not benchmarks, it is what each…

How to Cancel an AI Subscription on Mac and iPhone
Tipps für den Mac

How to Cancel an AI Subscription on Mac and iPhone

Most AI cancellations fail for the same reason, which is that the charge comes from Apple rather than from the AI company, and the AI company is not allowed to stop…

Siri AI on Mac: Where It Actually Lives in macOS 27
Tipps für den Mac

Siri AI on Mac: Where It Actually Lives in macOS 27

macOS 27 Golden Gate shipped on 14 September 2026, and Siri AI came with it. Most coverage says it is in Spotlight. That is one of four places it lives on a Mac…

ChatGPT Sponsored Agents: The Ads That Talk Back, Explained
KI-News

ChatGPT Sponsored Agents: The Ads That Talk Back, Explained

OpenAI announced on 16 September 2026 that it is testing Sponsored Agents, a ChatGPT ad format you can hold a conversation with. Here is what it is, how to spot…

All We Know About Google Gemini 4: Release Date, Rumors & What to Expect
KI-News

All We Know About Google Gemini 4: Release Date, Rumors & What to Expect

Gemini 4 is here, but you probably cannot use it yet. On September 30, 2026, Google announced Gemini 4 Argon, the first Gemini 4 model, and gave it only to vetted…

AI Misalignment: OpenAI Just Published Six Times Its Models Went Off Script
KI-News

AI Misalignment: OpenAI Just Published Six Times Its Models Went Off Script

An OpenAI model could not find the historical data it had been asked for, so it wrote itself a note saying it should invent reasonable numbers and "be transparent…

AI File Upload Limits: What Each Chatbot Actually Accepts
KI-Grundlagen und Anleitungen

AI File Upload Limits: What Each Chatbot Actually Accepts

Every chatbot caps what you can upload, and almost every guide online gets the numbers wrong. Here is what ChatGPT, Claude, Gemini, Grok and Perplexity actually…

Best AI Calendar Assistant for Mac: Which Ones Actually Work With iCloud
Tipps für den Mac

Best AI Calendar Assistant for Mac: Which Ones Actually Work With iCloud

Most AI calendar tools are built for Google Calendar, and on a Mac that is the whole problem. Here is which ones actually read and write iCloud, what they really…

iOS 27: Release Date, New Features, and Every Supported iPhone
KI-News

iOS 27: Release Date, New Features, and Every Supported iPhone

iOS 27 is out. Apple released it on Monday, September 14, 2026 as a free update for every iPhone going back to the iPhone 11, and the complete rebuild of Siri…

ChatGPT Tattoo Design: How to Get Something an Artist Can Actually Use
KI-Grundlagen und Anleitungen

ChatGPT Tattoo Design: How to Get Something an Artist Can Actually Use

ChatGPT will draw you a tattoo in about fifteen seconds. Whether a tattooist can actually ink it is a completely different question, and the people fielding these…

Apple Intelligence Not Working? How to Fix It on iPhone, iPad, and Mac
Tipps für den Mac

Apple Intelligence Not Working? How to Fix It on iPhone, iPad, and Mac

Apple Intelligence not working almost always comes down to five things, and only one of them is your hardware. Apple confirmed that iOS 27 arrives on 14 September…

AI Subtitles on a Mac: What Actually Works Right Now
Tipps für den Mac

AI Subtitles on a Mac: What Actually Works Right Now

VLC announced offline AI subtitles at CES 2025 and still has not shipped them. Meanwhile your Mac has been captioning audio on device this whole time, and macOS 27…

How to Create a Custom GPT: Who Still Can, and What to Do If You Cannot
KI-Grundlagen und Anleitungen

How to Create a Custom GPT: Who Still Can, and What to Do If You Cannot

Almost every guide to creating a custom GPT tells you to open the builder and click Create. That path is closed. OpenAI states that new GPT creation and publishing…

Microsoft Copilot vs Gemini in 2026: Prices, Mac Apps and the Verdict
KI-Grundlagen und Anleitungen

Microsoft Copilot vs Gemini in 2026: Prices, Mac Apps and the Verdict

Every Microsoft Copilot vs Gemini comparison online prices them as business seats, $18 a user against $14 a user. Almost nobody buys them that way. As consumer…

NotebookLM Alternatives: What Gemini Notebook Won’t Do, and What Fixes It
KI-Grundlagen und Anleitungen

NotebookLM Alternatives: What Gemini Notebook Won’t Do, and What Fixes It

Google renamed NotebookLM to Gemini Notebook in July 2026, but the reasons people look for a replacement did not change. Here is what the tool will not do, and the…

What Are AI Tokens? The Unit Every AI Bill Is Counted In
KI-Grundlagen und Anleitungen

What Are AI Tokens? The Unit Every AI Bill Is Counted In

Every AI price you have ever seen is quoted per million tokens, and almost nobody explains what a token actually is. It is not a word, it is not a message, and it…

Gemini Canvas: What It Is, What It Makes, and What It Costs
KI-Grundlagen und Anleitungen

Gemini Canvas: What It Is, What It Makes, and What It Costs

Gemini Canvas is a workspace inside the Gemini app where the model builds and edits a document, app or web page in place. Here is what it makes, what it costs, and…

Pace the Frontier: What AI Labs Actually Committed To
KI-News

Pace the Frontier: What AI Labs Actually Committed To

On 12 September 2026 Anthropic CEO Dario Amodei published an essay arguing that the AI industry should deliberately slow down, and within hours the heads of OpenAI…

How to Use Claude Projects: Setup, Limits and What They Cost
KI-Grundlagen und Anleitungen

How to Use Claude Projects: Setup, Limits and What They Cost

Claude Projects hold one long-running job in a single workspace: its chats, its files and its own instructions. Here is the setup, the five-project free cap…

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