Think with AI
& not just about it.
Choose better AI tools. Write better prompts. Build smarter workflows.
Welcome to T-Minus AI
I'm Kapisch — Enterprise AI Architect & Solo Builder.
I lead AI Enablement across global procurement at Siemens Healthineers — training 500+ procurement professionals globally and building negotiation AI frameworks. After hours, I ship products solo: a location tracker on the iOS App Store, AI guides, and more. Enterprise gives me scale. Indie gives me speed. T-Minus AI is where both worlds meet.
Get the Weekly AI Signal
One email every Tuesday for operators and builders: the 3 AI moves that matter, what they mean for real workflows, and one practical action to try.
First issue lands this Tuesday. No spam. Unsubscribe any time.
T-Minus Signal / What's New in AI
The AI landscape, distilled.
Curated signals from the frontier — Verified May 12, 2026.
GPT-5.5 Turns ChatGPT Into a More Serious Work Agent
OpenAI released GPT-5.5 on April 23, 2026 and framed it around real computer work: coding, research, data analysis, documents, spreadsheets, software operation, and multi-tool task completion.
Why it matters: The headline is not just benchmark lift. The practical buying question is now whether you need an assistant that can keep working across messy, multi-step tasks instead of answering one prompt at a time.
Workspace Agents Bring Shared ChatGPT Agents Into Team Workflows
OpenAI introduced workspace agents in ChatGPT for shared business workflows that can coordinate through tools, Slack-style processes, Codex-powered execution, and persistent team context.
Why it matters: This is the next version of custom GPTs: not personal toys, but shared agents that sit inside repeatable company workflows.
Claude Opus 4.6 Pushes Claude Further Into Premium Coding and Agent Work
Anthropic released Claude Opus 4.6 on February 5, 2026, positioning it as the high-end Claude model for difficult reasoning, software engineering, computer-use workflows, and agentic work.
Why it matters: Claude is no longer just the calm writing model. Its highest-value lane is now long-horizon technical work where context, judgment, and tool discipline matter.
Claude Sonnet 4.6 Makes 1M-Context and Computer Use More Practical
Anthropic introduced Sonnet 4.6 with stronger coding and computer-use behavior plus expanded long-context capabilities, including a 1M token context beta for qualified use cases.
Why it matters: For builders, Sonnet is the workhorse release: cheaper and faster than Opus, but increasingly capable enough for real agent loops.
Latest from the blog
Source-dated AI analysis
GPT-5.5 vs Claude Opus 4.6 vs Gemini Deep Research: Which AI Should You Use in May 2026?
The best model decision in May 2026 is no longer one leaderboard. GPT-5.5, Claude Opus 4.6, and Gemini Deep Research win different jobs.
Best AI Agents for Work in 2026: ChatGPT Workspace Agents, Claude, Gemini, Cursor, and Copilot
AI agents are becoming work infrastructure. Here is which agent stack fits coding, research, workspace automation, and creative production.
Open Models Are Back: Mistral 3 vs DeepSeek V4 vs Llama for Builders in 2026
Closed frontier models are pulling ahead on agents, but open models are becoming the control layer for serious builders.
AI Coding Agents in 2026: Cursor Long-Running Agents vs GitHub Copilot vs Claude Code
The coding assistant category split into three jobs: editor cockpit, enterprise copilot, and careful codebase agent.
Best AI Productivity Stack for 2026: ChatGPT, Claude, Gemini, Perplexity, NotebookLM, Canva
Stop collecting subscriptions. Build a stack with one assistant, one research layer, one execution layer, and only the specialist tools you actually use.
Claude Usage Limit Reached? 7 Ways to Make Your 5-Hour Window Last Longer
If Claude keeps telling you to come back later, the issue is usually workflow, not just message volume. These are the seven tactics that actually stretch your 5-hour window further.
AI Tools
Find the right tool for the job
Free Guides
Practical playbooks you can use today
The GPT-5 Intelligence Playbook
Professional model selection, execution modes, reasoning escalation, and agentic workflow blueprints for the GPT-5 family.
The OpenClaw Field Manual
A practical manual for OpenClaw architecture, skill risk management, 25+ real-world use cases, and a hardened deployment runbook.
Multimodal AI Mastery
Vision, voice, video, and document workflows with multimodal model comparisons, prompt frameworks, and failure-mode fixes.
The TminusAI Prompt Scorecard
A decision-grade QA system for prompts, with diagnostic protocols, adversarial review loops, debugging logic, and ready-to-use templates.
AI Stack Builder
Answer a few questions and get the right AI stack for your workflow and budget.
Transcript Summarizer
Paste any transcript — YouTube, podcast, meeting — get briefs, action items, chapters, and prompts.
Prompt Scorecard
Grade any AI prompt in seconds — 7 dimensions, letter grade, fix suggestions.
AI Plan Comparator
Compare real AI plan tiers side-by-side before you stack more subscriptions.
Trusted by power users
"Perfect for beginners who finally decided to use AI efficiently."
— Halil Önder Özbaşak
"An excellent guide with checklists to get the most accurate prompt and the most relevant result."
— Verified Gumroad buyer
"This power user guide helps build a system for the most appropriate AI answers."
— Verified Gumroad buyer