Codex CLI Install: 4 Easy Ways to Set Up and Log In (2026)
Codex CLI install guide from OpenAI's docs (Oct 21, 2026): four official install methods, which ChatGPT plans include the CLI, ChatGPT vs API key vs device code login, Windows support…
BUFFER’S NOTEBOOK
Category: OpenAI
8 articles
My notes on ChatGPT and Codex: which plan is worth it, how the limits really behave, and how to cancel or downgrade without getting charged again. I test what I can on my own account, so you can spend right on AI instead of guessing.
Claude Code vs Codex: Which One Should You Pay For? An Honest 2026 Guide
Claude Code vs Codex, compared on price, usage limits, models, setup and account risk, with a decision table by user type.
ChatGPT Go vs Plus vs Pro: Which Plan to Buy in 2026 (Honest Notes)
ChatGPT Go vs Plus vs Pro, checked against OpenAI's own pages on Oct 20, 2026: $8, $20 or $100–$500 a month, what Codex you actually get, and three rules for…
Cancel AI Subscription or Downgrade? 11 Honest Calls for ChatGPT, Claude and Gemini
Renew, downgrade or cancel? A practical decision table for ChatGPT, Claude and Gemini plans, with the official cancel, refund and App Store rules.
Google AI Pro vs Ultra: What You Actually Get and Who Should Pay (2026)
Google AI Pro vs Ultra from Google's own plan pages: what $19.99, $99.99 and $199.99 a month actually get you, how Gemini limits work, and who should pay for Ultra.
Codex vs Claude vs Gemini Usage Limits: Whose Quota Rules Can You Trust?
The question I’ve gotten most these past two weeks: which AI subscription gives you the most for your money, Codex, Gemini or Claude? Honest answer, I can’t tell you. Not…
ChatGPT Pro 100 vs 200 vs 500: Which Tier After the Oct 29 Change?
ChatGPT Pro 100 vs 200 vs 500: what OpenAI actually commits to, who keeps the old Pro 200 allowance until Oct 29, how Fast and Ultrafast burn usage, and which…
Which AI Subscription Is Worth It in 2026? My Honest Picks by Use Case
Which AI subscription is worth paying for in 2026: a use-case decision guide for ChatGPT, Claude, Google AI and DeepSeek, with official prices checked on Oct 21, 2026.