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.

Why AI Gives You a Different Answer Every Time
AI Basics and How-To Guides

Why AI Gives You a Different Answer Every Time

Ask an AI the same question twice and you often get two different answers. Researchers at Thinking Machines Lab ran the same prompt 1,000 times with randomness…

Can You Sell AI-Generated Art? What the Platforms Actually Say
AI Basics and How-To Guides

Can You Sell AI-Generated Art? What the Platforms Actually Say

Yes, you can sell AI-generated art. But the platforms disagree completely about whether they will host it, and a lot of the advice online is not in the policies it…

iPhone 18 Pro AI Features: Every One, and Which Need the New Phone
AI News

iPhone 18 Pro AI Features: Every One, and Which Need the New Phone

Apple gave AI top billing at the iPhone 18 Pro launch on 9 September 2026, and the A20 Pro doubles the Neural Engine to 32 cores. Yet almost every AI feature Apple…

Claude Pro vs Max: Which Plan You Actually Need
AI Basics and How-To Guides

Claude Pro vs Max: Which Plan You Actually Need

Claude Pro and Max run the same models. The only difference is how much you can use them, and Anthropic will not tell you how much that is.

DeepSeek vs Claude: Which One Should You Actually Pay For?
AI Basics and How-To Guides

DeepSeek vs Claude: Which One Should You Actually Pay For?

Almost every comparison you can find still prices DeepSeek at $0.14 per million input tokens. That rate was retired at 16:00 UTC on 16 August 2026, when DeepSeek…

iPhone Duo: Every AI Feature in Apple's First Foldable
AI News

iPhone Duo: Every AI Feature in Apple's First Foldable

Apple announced the iPhone Duo on 9 September 2026, its first foldable iPhone, at $1,999 for 256GB. It runs the same A20 Pro chip as the iPhone 18 Pro, so every AI…

Apple Audio Intelligence: What Your Apple Watch Actually Hears
AI News

Apple Audio Intelligence: What Your Apple Watch Actually Hears

Apple announced Audio Intelligence on 9 September 2026, a set of four Apple Watch features that includes a tool which summarises the conversations you have during…

Perplexity vs ChatGPT: What Actually Separates Them
AI Basics and How-To Guides

Perplexity vs ChatGPT: What Actually Separates Them

Almost every Perplexity vs ChatGPT comparison treats them as rival brains. They are not. On a paid Perplexity plan you can be talking to OpenAI, because Perplexity…

AI Benchmarks Explained: What MMLU, GPQA, SWE-bench and LMArena Actually Measure
AI Technical Insights

AI Benchmarks Explained: What MMLU, GPQA, SWE-bench and LMArena Actually Measure

Every AI launch arrives with a wall of numbers. The benchmarks behind them are narrower, older and more fragile than the charts suggest, and the same test can hand…

ChatGPT Canvas Is Gone: What Replaced It and What to Use Now
AI Basics and How-To Guides

ChatGPT Canvas Is Gone: What Replaced It and What to Use Now

ChatGPT Canvas was removed on 28 May 2026 and replaced by writing blocks and code blocks. Here is what changed, where each Canvas feature went, and how to do the…

Best AI Menu Bar Apps for Mac: The Four Jobs They Actually Do
Tips for Mac

Best AI Menu Bar Apps for Mac: The Four Jobs They Actually Do

Every roundup treats AI menu bar apps as one category. They are four different jobs, and most people who think they need one app actually need two. Here is what…

ChatGPT Images 2.5 Is Here: Faster Generation, Comment Edits and Two New API Models
AI News

ChatGPT Images 2.5 Is Here: Faster Generation, Comment Edits and Two New API Models

OpenAI shipped ChatGPT Images 2.5 on 8 September 2026 with up to 50% lower generation latency, comment-based editing, a Sketch tool and two new API models. Here is…

Claude vs Perplexity: Which AI Should You Actually Pay For?
AI Basics and How-To Guides

Claude vs Perplexity: Which AI Should You Actually Pay For?

Most Claude vs Perplexity comparisons get two things wrong. Perplexity can already run Claude on a paid plan, and Claude has searched the web on every plan since…

Grok Bot vs Claude Cowork: Which AI Agent Is Worth $20?
AI Basics and How-To Guides

Grok Bot vs Claude Cowork: Which AI Agent Is Worth $20?

On 11 August 2026 Grok Bot cost $200 a month. Fifteen days later it cost $20, the same as Claude Cowork on Claude Pro. Both agents now run in the cloud, both keep…

Apple Intelligence vs ChatGPT: What Each One Actually Does on Your Mac
Tips for Mac

Apple Intelligence vs ChatGPT: What Each One Actually Does on Your Mac

Apple Intelligence is not a chatbot, and ChatGPT is already wired into it. Here is what each one actually does on a Mac, where Google Gemini fits in, and which one…

ChatGPT Limits: When They Reset and How to Check
AI Basics and How-To Guides

ChatGPT Limits: When They Reset and How to Check

ChatGPT does not show you how much you have left. There is no counter, no meter and no usage page for ordinary chat. Here is what is actually capped in 2026, when…

AI PDF Reader: The 8 Best Tools Compared for 2026
AI Basics and How-To Guides

AI PDF Reader: The 8 Best Tools Compared for 2026

Eight AI PDF readers compared on what they actually do with your document, including the split between tools that analyze files and tools that read them aloud.

ChatGPT Plus vs Pro: Which Plan You Actually Need
AI Basics and How-To Guides

ChatGPT Plus vs Pro: Which Plan You Actually Need

ChatGPT Plus is $20 a month. ChatGPT Pro is not one plan but two, at $100 and $200, and OpenAI describes the gap between them in usage multipliers rather than…

When Will AGI Happen? Every Prediction, Tracked and Scored
AI News

When Will AGI Happen? Every Prediction, Tracked and Scored

Every frontier lab CEO has named a year for AGI, and several of those years have already gone by. This is the full board: who predicted what, the date they said it…

Claude Memory: How to Control What Claude Remembers
AI Basics and How-To Guides

Claude Memory: How to Control What Claude Remembers

Claude memory is on by default on the Free, Pro and Max plans, it now carries context between chat and Cowork, and deleting a conversation does not delete what…

iPhone Buying Guide 2026: Buy Now, or Wait for the iPhone 18?
AI News

iPhone Buying Guide 2026: Buy Now, or Wait for the iPhone 18?

Apple’s event has been and gone. The iPhone 18 Pro starts at $1,199, the foldable is called the iPhone Duo, and the phone actually named the iPhone 18 is not coming…

Grok vs Gemini: Which AI Is Actually Better in 2026?
AI Basics and How-To Guides

Grok vs Gemini: Which AI Is Actually Better in 2026?

Grok 4.6 and Gemini 3.1 Pro cost almost the same to run, but they are built for different jobs. Gemini is the better default for most people. Grok is the sharper…

GPT-6 Astra Is Here: Benchmarks, Price, and What the Numbers Don't Say
AI News

GPT-6 Astra Is Here: Benchmarks, Price, and What the Numbers Don't Say

OpenAI launched GPT-6 Astra on September 3, 2026, calling it state of the art on computer use, software engineering and science, and the first model it has ever…

Muse Spark 1.3: What Meta’s Own Benchmark Chart Actually Shows
AI News

Muse Spark 1.3: What Meta’s Own Benchmark Chart Actually Shows

Meta released Muse Spark 1.3 on September 2, 2026, its fourth Muse Spark in five months. It wins every coding and long-context row on Meta’s own chart and loses…

Restore Old Photos With AI: What Works and What It Changes
Tips for Mac

Restore Old Photos With AI: What Works and What It Changes

AI can repair a scratched, faded family photo in about a minute. The catch is that some tools repair the picture and others quietly repaint it, and the result that…

Gemini 3.8 Flash: Benchmarks, Pricing and What the Headlines Got Wrong
AI News

Gemini 3.8 Flash: Benchmarks, Pricing and What the Headlines Got Wrong

Google made Gemini 3.8 Flash generally available on September 2, 2026, three weeks after 3.7 Flash. It wins 8 of the 14 rows in Google's own comparison table and…

Claude Fable 5.1 and Mythos 5.1: One Model, Two Sets of Safeguards
AI News

Claude Fable 5.1 and Mythos 5.1: One Model, Two Sets of Safeguards

Anthropic released Claude Fable 5.1 and Claude Mythos 5.1 on September 1, 2026. They are the same model with two different safety layers, and the system card calls…

What Is Artificial General Intelligence (AGI)? Definition, Examples and Where We Actually Are
AI Basics and How-To Guides

What Is Artificial General Intelligence (AGI)? Definition, Examples and Where We Actually Are

Artificial general intelligence is an AI that matches human ability across essentially every cognitive task, and it does not exist. What changed recently is that…

Who Is John Ternus? Apple’s New CEO, Net Worth & AI Plan
People of AI

Who Is John Ternus? Apple’s New CEO, Net Worth & AI Plan

John Ternus is the CEO of Apple, effective 1 September 2026. He is a 51-year-old mechanical engineer who spent 25 years building the iPhone, iPad and Mac, and he…

Microsoft Copilot vs ChatGPT in 2026: Which One Should You Pay For?
AI Basics and How-To Guides

Microsoft Copilot vs ChatGPT in 2026: Which One Should You Pay For?

Almost every Microsoft Copilot vs ChatGPT comparison online still pits Copilot Pro against ChatGPT Plus at $20 each. Copilot Pro stopped selling in October 2025 and…

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