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Danube Labs

Insights

Notes from the work.

Practical guides on AI coding agents, LLM costs, websites and custom software: what we built, what it cost and what we would do differently.

Articles tagged AI

  • 7 min read

    AI News September 2026: Models, Prices, Deals and Rules

    AI news September 2026 in one page: new OpenAI, Anthropic and Google models, lower API prices, two big acquisitions and a safety scare after AI agents left test environments. Every item is sourced.

    • AI news
    • AI
    • Regulation
  • 7 min read

    AI Coding Subscriptions Compared: Prices and Limits 2026

    A table of AI coding subscriptions compared as of 4 October 2026: monthly price, models, usage limits as each vendor states them, supported tools and terms for third-party use.

    • AI
    • Subscriptions
    • Pricing
  • 8 min read

    Zero Data Retention in AI Routers: Does ZDR Survive Every Hop?

    Zero data retention means a provider stores neither your prompt nor the answer. Through a router the promise must hold at every hop. Here is what OpenRouter, OpenCode and Command Code document as of 4 October 2026.

    • Security
    • AI
    • LLM
  • 8 min read

    EU AI Act Small Business Guide: What to Do in 2026

    The EU AI Act small business rules in 2026: which dates moved after the omnibus, what tool users must do, when to label AI content, and the fines as written.

    • Regulation
    • Small business
    • AI
  • 6 min read

    Best AI Coding Plan for Your Usage: Monthly Costs (2026)

    The best AI coding plan depends on your monthly calls. Six usage profiles priced at API list prices and matched to published plan allowances, with the arithmetic and when to switch.

    • AI
    • Cost optimisation
    • Subscriptions
  • 7 min read

    OpenRouter vs Direct API: When an AI Router Is Worth It

    A router gives you one key, one bill and many models. A direct API gives you one contract and fewer parties. See how OpenRouter, OpenCode, Command Code and a local gateway differ, checked 4 October 2026.

    • AI
    • LLM
    • Developer tools
  • 6 min read

    OpenCode Go Review: Plans, Limits, Command Code, Charm Hyper

    OpenCode Go costs $10 a month, Command Code starts at $1 with a $10 GOAT plan, and Charm Hyper (called HyperCharm in some tools) sells credits. Prices, limits and caveats as of 4 October 2026.

    • AI
    • Developer tools
    • Subscriptions
  • 7 min read

    AI Adoption in Romania: Where SMEs Stand in 2026

    AI adoption in Romania: 5.21% of enterprises used AI in 2025, the lowest share in the EU. Eurostat data, first use cases, costs, GDPR, the AI Act and verified funding.

    • AI
    • Small business
    • Automation
  • 7 min read

    Does ChatGPT Use My Data for Training? Privacy Settings Guide

    On personal plans, ChatGPT may train on your chats unless you opt out. Compare ChatGPT, Gemini, Claude, Copilot and others: training defaults, opt-outs, temporary chats and retention, checked 4 October 2026.

    • AI
    • Security
    • Guides
  • 7 min read

    AI Agents ROI: A Practical Formula for Your Business

    AI agents ROI comes down to time saved times loaded cost, minus tokens, review and maintenance. A formula, a worked example, a pilot method and when not to automate.

    • AI
    • Automation
    • Business
  • 7 min read

    AI for Students: How to Study With AI Without Cheating

    AI for students works as a tutor, not a ghostwriter. See what ASE and other Romanian universities allow, how to self-test, check sources, cite AI use and prompt it like a tutor.

    • AI
    • Productivity
    • Guides
  • 9 min read

    Prompt Caching Explained for Claude Code and Long AI Sessions

    Prompt caching lets an LLM reuse the part of your prompt that has not changed and bill it at a fraction of the input price. Here is how the cache, its 5-minute and 1-hour TTL, and keep-alive pings work.

    • AI
    • Claude Code
    • Cost optimisation
  • 7 min read

    Local Whisper Transcription on Your Own PC, Step by Step

    Local Whisper transcription keeps your audio on your own computer. Convert to 16 kHz mono with FFmpeg, run faster-whisper on a GPU or CPU, and export TXT, SRT or VTT, with speaker labels from pyannote.

    • AI
    • Speech to text
    • Open source
  • 8 min read

    Translate Word Document with AI and Keep Formatting

    To translate a Word document with AI and keep the formatting, extract the text run by run, translate it in chunks with context, and write it back into the same runs. PDFs need extraction or OCR first.

    • AI
    • Translation
    • Automation
  • 7 min read

    Train YOLOv8 on Custom Dataset With Real Metrics and Lessons

    A step-by-step YOLOv8 custom training walkthrough with real results: 0.84 precision, 0.50 recall and 0.59 mAP@50. Learn what low recall means and why more varied data helped more than a bigger model.

    • Computer vision
    • Machine learning
    • AI
  • 2 min read

    How we cut LLM costs by 99% without hurting quality

    Most AI features are expensive because nobody measured them. Here is the routing, caching and prompt work that took one production workload from thousands to tens of dollars a month.

    • AI
    • LLM
    • Cost optimisation