by HDDH
Genspark, Claude Code, ChatGPT, Gemini, Antigravity, and other generative AI and agentic AI tools — put to the test by a software engineer with 20 years of experience. From pricing, comparisons, and how-to guides to real failures and hands-on examples in AI development.
Google's referral program let eligible new users try Google AI Pro — Gemini's more capable models, Deep Research, and AI across Google apps — free for four months. This article explains how the offer worked, who qualified, and what to try during the trial. My referral invitations have all been given out, but questions about Gemini or AI are still welcome through the form (in Japanese only).
Claude's Guest Pass lets people new to a paid Claude plan try Claude Pro free for seven days, including Claude Code, Claude Cowork, and Claude Design. This article covers who's eligible, what's included, and the payment-method requirement and auto-renewal. My Guest Pass invitations have all been given out, but questions about Claude or AI are still welcome through the form.
I ran the same set of general knowledge questions, up to 500 of them, against the free plans of ChatGPT, Claude, and Gemini. All three scored 100% accuracy on what they answered, but how many questions they could handle varied enormously: ChatGPT stopped at 75, Gemini at 210, and Claude completed all 500. Response styles were just as different. If you're trying to decide which free AI to use, here's what the actual numbers showed.
New AI tools keep showing up one after another, but how many people actually keep paying for one over the long haul? Here, combining the impressions of users who've kept paying for Genspark for a year...
Services built around the concept of "handing work over to an AI agent" have surged in the past year. Claude Cowork, Genspark Claw, and Gemini (Antigravity) each aim to be an "autonomously working AI,...
"If I'm going to use AI for personal development, which one should I actually pick?" is a question most people ask themselves eventually. Genspark, Claude, and Gemini all have a growing number of real...
Anyone who's just started using Claude runs into the same question: stick with the free plan, or pay up? Here's a look at the judgment criteria many users actually apply, along with a few tricks for k...
Gemini's free plan is appealing for how easy it is to get started — all you need is a Google account. But if you use it without knowing exactly where the limits are, you can end up caught off guard wh...
Google's image-generation model "Nano Banana" has been drawing attention, alongside its higher-tier sibling "Nano Banana Pro." Both are capable of producing high-quality images, but they seem to diffe...
Genspark, Claude Code, and Gemini each impose usage limits in different ways. This article compares their credit systems, rate limits, and usage caps side by side, and highlights the shared principle behind avoiding wasted usage.
AI image generation is reshaping frontline sales. In this post, I walk through a 3-step workflow — smartphone photo, instant AI rendering, on-the-spot quote — that lets sales reps deliver a photorealistic completion image and a ballpark figure during the pitch itself. Includes real implementation challenges and how AI agents can automate the follow-up.
I'm laying out my entire AI subscription stack as of May 2026 — what I pay for, what I canceled, and what my costs look like after trimming the fat. Spoiler: Claude + Genspark as the core two, Cloudflare for $5/month infrastructure, and cutting ChatGPT, Perplexity, and GitHub Copilot saved around $40–50/month.
