Zukko Blog
Guides to Claude Code, Cursor, Codex and the Claude and GPT APIs: setup, token savings and troubleshooting.
LangChain4j: connect a Java app to Claude and GPT via a gateway
4 min · · development
LangChain4j works with any OpenAI-compatible address. Build setup, chat, streaming and an AI Service with @Tool on the Zukko gateway.
API for Qwen: connecting Qwen 3.8 Max, pricing and Python examples
4 min · · models
Connect qwen3.8-max through the OpenAI SDK, send images, feed a long document and calculate the price of a typical request by formula.
Ollama Cloud or an API gateway: what to choose for cloud models
6 min · · сравнение
Ollama Cloud continues the familiar Ollama workflow, but in the cloud. How it differs from a pay-per-token gateway and how to choose for your task.
DeepSeek API for free: is there a free tier and what is the minimum cost
5 min · · экономия
We do not promise free access, but the minimum is very low. A formula-based count of how many requests fit into one dollar.
DeepSeek API price: cost of V4 Pro and V4.1 Flash worked through
5 min · · models
What requests to three DeepSeek models cost: the formula, three typical scenarios at 10,000 requests, the role of the cache and a usage-based cost script.
AI for HTML and CSS: layout from a description or a screenshot
5 min · · development
How to get a model to write markup without junk divs and broken responsiveness: prompt, mockup screenshot input, a Python script and result checks.
How much the Gemini API costs: 3.8 Flash and 3.7 Flash calculated on examples
6 min · · экономия
A price table for Gemini 3.8 Flash and 3.7 Flash and three calculations with formulas: a chatbot, bulk classification and a long document, with and without cache.
A GPT chatbot in Russian: how to use GPT and Claude models in the browser
5 min · · models
What a GPT chatbot is, how to open a Russian-language chat with GPT and Claude models without a subscription, how to choose a model and what ten messages cost.
Gemini API: what it is, which models are available and how to call it
6 min · · API keys
What the Gemini API is, which Gemini models are available, how the native format differs from the OpenAI-compatible one, and a first request.
How to pay for the Qwen API from Russia: a gateway instead of an Alibaba Cloud card
5 min · · payments
The official Qwen API is provided by Alibaba Cloud with its own payment terms. Here is another path, a gateway balance: top-up, key, request and a price calculation with the fee.
Claude Sonnet: what it is for and which version to pick in 2026
5 min · · models
What Claude Sonnet is, which tasks it usually gets and how versions 5.5, 5 and 4.6 differ in price, context and index. With a calculation and a test script.
Embeddings in plain words: what they are and why search needs them
5 min · · models
An embedding turns text into a set of numbers you can use to find similar meaning. We explain without math, where embeddings come from, and when you do not need a vector database.
Qwen Code: what it is and which models you can run in it
5 min · · агенты
Qwen Code is often confused with the Qwen Coder model. We explain that it is a separate program, how it works and which models it can use.
Qwen API price: a calculation for Qwen 3.8 Max and 3.8 Flash on typical tasks
6 min · · экономия
Three typical tasks, formulas and totals for Qwen 3.8 Max and Qwen 3.8 Flash, plus a note on how cache behaves.
Claude Opus: what the senior model is for and when it pays off
5 min · · models
Opus 5.5 in Zukko costs twice as much as Sonnet 5.5. When the extra spend is justified, when the smaller model is enough, with a worked example.
Free Qwen API: Alibaba Cloud quotas and the price after them
6 min · · экономия
A free Qwen quota exists, but it has an expiry date and is tied to a region and a model. We go through the terms and count what comes after.
DeepSeek API key: how to get one and which base_url to use
5 min · · API keys
Two ways to a DeepSeek key: the official platform and the Zukko gateway. API addresses, model names, checking the key and common connection errors.
DeepSeek API: what it is and how it differs from the DeepSeek chat
5 min · · models
A chat is for people, an API is for programs. What the DeepSeek API is, which models exist, how tokens are billed and how to send a first request.
Grok API key: getting an xAI key and calling Grok 4.7 through a gateway
5 min · · API keys
Two routes to Grok: an xAI console key, or a gateway key paid by SBP, MasterCard or crypto. Steps, a request example and what it costs.
ChatGPT API price: what GPT models cost and how to price a request
6 min · · экономия
We price requests to GPT models at October 18, 2026 rates: the formula, the role of cache, three scenarios and a comparison with official tariffs.
AI for Arduino: how to write sketches with a model and not fry the board
5 min · · development
A model can draft a sketch but cannot see your wiring. How to describe the board, check code before uploading and debug using Serial output.
GLM API price: what GLM 5.3 and 5.3 Flash cost on real tasks
6 min · · экономия
We price GLM 5.3 and GLM 5.3 Flash on three scenarios and explain why a single input and output price helps with long answers.
GPT-6 Astra or GPT-6 Sol: price and index differences, and what to pick
5 min · · сравнение
Astra and Sol from the GPT-6 family differ in price and Intelligence Index. We price the same task on both and give a simple selection rule.
ChatGPT does not work in Russia: what the errors mean and what to do
5 min · · errors
Access errors for ChatGPT and the OpenAI API explained, with their causes and a way to use GPT models through a gateway in chat and via the API.