Models & Market tag | eYssen AI

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Your Model Was Deprecated: What Now?

Krisztian Eyssen, Krisztian Eyssen

Your Model Was Deprecated: What Now?

The loud case is easy: you get an error and you know what to do. The quiet case is the dangerous one — when everything still works, only the output has changed.

Intermediate Business owner Troubleshooting Models & Market

Sep 11, 2026 Bite-Sized AI

Leaderboards vs Real Use: Why They Disagree

Krisztian Eyssen, Krisztian Eyssen

Leaderboards vs Real Use: Why They Disagree

The most-used models are regularly not at the top of the rankings. Not because the rankings lie — because they do not measure what people actually choose on.

Intermediate Everyone Explainer Models & Market

Sep 11, 2026 Bite-Sized AI

European AI Options: Data Residency and Sovereignty

Krisztian Eyssen, Krisztian Eyssen

European AI Options: Data Residency and Sovereignty

"Our server is in Frankfurt" — that is a fact about geography, and it says almost nothing about law. Separating the two is the point of this article.

Intermediate Business owner How-To Models & Market

Sep 11, 2026 Bite-Sized AI

Which Models Handle Smaller Languages Well

Krisztian Eyssen, Krisztian Eyssen

Which Models Handle Smaller Languages Well

Non-English text breaks into up to three times as many tokens as English — and that is the easier problem. The harder one you can measure yourself in five minutes.

Intermediate Everyone Comparison Models & Market

Sep 11, 2026 Bite-Sized AI

Fast and Cheap or Slow and Smart? Picking the Right Tier

Krisztian Eyssen, Krisztian Eyssen

Fast and Cheap or Slow and Smart? Picking the Right Tier

Inside one family the price gap between the cheapest and the most expensive tier is twenty-five fold. Most tasks do not need the most expensive one — and this is the easiest saving available.

Intermediate Business owner How-To Models & Market

Sep 11, 2026 Bite-Sized AI

Free vs Paid AI: What the Subscription Buys

Krisztian Eyssen, Krisztian Eyssen

Free vs Paid AI: What the Subscription Buys

Not a smarter model — a serious model runs on the free tier too. You buy five things, and the most important one is what fewest people check.

Beginner Everyone Comparison Models & Market

Sep 11, 2026 Bite-Sized AI

What You Actually Pay For: AI Pricing Decoded

Krisztian Eyssen, Krisztian Eyssen

What You Actually Pay For: AI Pricing Decoded

Six pricing shapes, four multipliers the list price does not show, and the hidden costs that turn the bill into three times the estimate.

Intermediate Business owner Explainer Models & Market

Sep 11, 2026 Bite-Sized AI

Chatbot, API or App: Three Ways to Buy AI

Krisztian Eyssen, Krisztian Eyssen

Chatbot, API or App: Three Ways to Buy AI

The same model in three packagings, with three price tags and three data paths. The choice is not a technical question but a question of who does the work.

Beginner Everyone Comparison Models & Market

Sep 11, 2026 Bite-Sized AI

The Big Model Families: Who Is Who in AI

Krisztian Eyssen, Krisztian Eyssen

The Big Model Families: Who Is Who in AI

Eight or ten names, and the whole market fits behind them. No version numbers, because those go stale in six months — the families stay.

Beginner Everyone Explainer Models & Market

Sep 11, 2026

How to Choose an AI Model for the Job

Krisztian Eyssen, Krisztian Eyssen

How to Choose an AI Model for the Job

Five questions that outlive every model generation. The sixth — "which one is best?" — is the one not worth asking.

Beginner Everyone Comparison Models & Market

Sep 11, 2026

Three Billion Euros for Sovereign Open Weights — What Does That Buy a Small Business?

Krisztian Eyssen, Krisztian Eyssen

Three Billion Euros for Sovereign Open Weights — What Does That Buy a Small Business?

On 8 September Mistral AI announced a 3 billion euro round at a valuation of 21 billion euros, led by Samsung — by the company's account the largest European technology funding round ever. The keywords of the announcement: open weights, its own infrastructure, and a customer who is "never locked into a single vendor's roadmap, pricing or availability". We checked how much of that also holds in the licence text and on the price list.

Beginner Business owner News Models & Market

Sep 8, 2026 Latest AI news

Stripe Is Buying OpenRouter: A Payments Company Becomes the Gatekeeper of Models

Krisztian Eyssen, Krisztian Eyssen

Stripe Is Buying OpenRouter: A Payments Company Becomes the Gatekeeper of Models

On 19 August both Stripe and OpenRouter announced that the payments provider is acquiring the largest model router — the layer that carries more than ten trillion tokens a day towards 400 models and 80 providers. Neither announcement names a price. OpenRouter promises the product, the name and the neutrality all stay as they are. Not one official statement says a word about pricing or about data handling — and that in itself is information.

Beginner Business owner OpenRouter News Models & Market

Aug 19, 2026 Latest AI news

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