OpenTahr
Log in

The journal

AI blog on models, prices and news

New models, their prices, what works and what is a waste of money.

A man comparing a printed invoice with his phone at a desk with a laptopAI without a subscription13 min read

Koala and Writesonic alternative, pay for AI per use

Word quotas at Koala and article quotas at Writesonic, set against the cents of BYOK. Dated official prices and the cases where a dedicated tool still makes sense.

Read the article → A woman creator comparing two handwritten lists to pick a free AI API keyAI without a subscription11 min read

Free AI API keys, the options that really exist

Gemini, Groq, Mistral and OpenRouter give a free AI API key with no credit card, while the others bill per use. A dated comparison with quotas and traps included.

Read the article → A woman editor carefully checking the pages of a printed documentAI without a subscription9 min read

Perplexity API key (Sonar) without a Pro account

A Perplexity API key needs no Pro account. You create it on console.perplexity.ai and pay per use for Sonar models that cite their sources, plus a small search fee.

Read the article → A content creator checking a smartphone while sitting at a desk with a laptopAI without a subscription8 min read

How to get a Grok API key without an X subscription

You create the Grok API key on console.x.ai with no X Premium subscription. The xAI account, the credits, the official model prices and how Grok differs from Groq.

Read the article → Hands moving quickly across a laptop keyboard in the middle of typingAI without a subscription8 min read

How to get a Groq API key for fast AI

The Groq API key is free to create and serves open models at record speed. How to set it up, what the free tier allows and how Groq differs from xAI's Grok.

Read the article → A hand placing a folder on a tall stack of files next to a laptopAI news5 min read

AI in public services as France equips one million staff

France is giving close to one million government employees an AI assistant for public services, with 655 million euros on the table. Here is what changes and what you can take from it.

Read the article → A small coin dropped into a piggy bank next to a laptop computerAI without a subscription16 min read

How to get a DeepSeek API key at a rock-bottom price

The DeepSeek API key opens some of the cheapest models on the market. How to create it, the official price list, how the cache works and the trade-offs to know about.

Read the article → A hand holding a glass prism that splits light in front of a laptopAI news6 min read

Gemini 3.5 Pro launch and what it changes for your AI work

Gemini 3.5 Pro should open to the public in late June 2026 with a 2 million token context window and Deep Think mode. Here is what it changes for your AI projects.

Read the article → A single key held up in front of a wall of metal mailboxesAI without a subscription11 min read

OpenRouter API key, one account for every AI model

One account, one OpenRouter key and hundreds of AI models. How to create it, how credits and free models work and what it really costs next to direct keys.

Read the article → A hand holding a smartphone with a bright orange screen above a laptopAI news6 min read

Google AI Mode goes default as 68% of searches get no click

Google made AI Mode its default search experience and 68% of searches now end without a click. Here is what that means for your traffic and how to stay visible.

Read the article → A man typing on a laptop at an open window overlooking Paris rooftopsAI without a subscription11 min read

How to get a Mistral API key, free plan included

Create your Mistral API key on La Plateforme with the free Experiment plan, some of the lowest official prices on the market and a European legal base.

Read the article → Hands typing on a keyboard with a credit card set aside on the deskAI without a subscription15 min read

How to get a free Gemini API key

A free Gemini API key takes two minutes to create on Google AI Studio, with no credit card. The exact path comes with the quotas, the trade-off and the limits.

Read the article →