Author: Markos Symeonides

Case Studies

ChatGPT Security History Guide: Review Sign-Ins, MFA and Passkey Changes, Manage Sessions, Rotate API Keys, and Respond to Compromise
ByMarkos Symeonides September 26, 2026 Reading Time: 67 minutes

What changed on September 25: Security History gives ChatGPT users a review surface for account activity OpenAI’s September 25, 2026 ChatGPT release notes introduced Security History, a web-based account-security view that can show recent security-relevant activity for a user’s account. According to OpenAI, users can reach it on the web…

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AI News

Build a Controlled Customer-Specific Demo With Codex: Authorized Call Notes, Email Context, Spreadsheets, HTML Prototypes, and Engineering Handoff
ByMarkos Symeonides September 26, 2026 Reading Time: 65 minutes

What this tutorial builds—and what it deliberately does not build This tutorial shows a controlled way to convert authorized discovery material into a customer-specific HTML demo prototype with Codex support. The workflow is inspired by OpenAI’s Proaction customer story, where OpenAI reports that Proaction uses Codex to turn authorized customer…

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Downloads

OpenAI Codex Recovers From September 25 Full Outage: Timeline, API-Key Login Workaround, Mitigation, and Recovery Boundaries
ByMarkos Symeonides September 26, 2026 Reading Time: 63 minutes

OpenAI Status reports a 56-minute Codex full outage on September 25 OpenAI’s public status record for the September 25, 2026 Codex incident identifies the event as “Issues with Codex” and marks it resolved after a 56-minute window, beginning at 10:58 PM and ending at 11:54 PM. The incident page classifies…

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AI News

ChatGPT Native Flashcards Prompting Playbook: Source Notes, Atomic Questions, Difficulty Calibration, Coverage Checks, Shuffle Practice, and Review Evidence
ByMarkos Symeonides September 25, 2026 Reading Time: 66 minutes

What changed: ChatGPT now has native interactive flashcards OpenAI’s September 22 ChatGPT release notes document a new native Flashcards capability: users can create interactive flashcards by asking ChatGPT for cards on a topic or by uploading notes, then practice by flipping cards, marking them as known or not known, shuffling…

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ChatGPT Prompts

Inside Airbnb’s Expanded OpenAI Stack: Codex Remote Agents, GPT-6 Astra, API and Bedrock Access, Strategic Documents, and Reported Productivity
ByMarkos Symeonides September 25, 2026 Reading Time: 64 minutes

Source-fact checkpoint: OpenAI’s September 23, 2026 announcement says Airbnb uses remote AI agents powered by Codex and models including GPT-5.6 Sol, GPT-5.6 Terra, and GPT-5.6 Luna. It also reports one user reaching a strong strategic-document result in three to four passes versus 20+ rounds with other models; this is an…

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25 ChatGPT-5.5 and Codex Prompts for Product Engineering Teams: Bug Triage, Design Reviews, Remote Agents, Strategic Documents, and Release Evidence
ByMarkos Symeonides September 25, 2026 Reading Time: 64 minutes

How to Use This Product-Engineering Prompt Set Safely This prompt set is written for product-engineering teams that want ChatGPT and Codex to help with high-friction engineering work: reproducing bugs, narrowing design options, drafting architecture decisions, scoping remote-agent tasks, reviewing release evidence, and preparing rollback plans. It is not a claim…

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Case Studies

ChatGPT Privacy Center Guide: Memory, Personalized Ads, Temporary Chat, Connected Apps, Model Improvement, Data Export, and Account Security
ByMarkos Symeonides September 25, 2026 Reading Time: 70 minutes

What the ChatGPT Privacy Center is—and what it is not OpenAI says the ChatGPT Privacy Center is rolling out as a signed-in product area for Free, Go, Plus, Pro, and Business users on web, iOS, and Android. The rollout does not include Enterprise, Edu, or Healthcare, and the practical experience…

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AI News

Upgrade to Codex CLI 0.157 and Test the New Workflow: Background Server Startup, Conversation Forking, Remote Import, Draft Recovery, and Network Policy
ByMarkos Symeonides September 25, 2026September 25, 2026 Reading Time: 74 minutes

Codex CLI 0.157 is a workflow release, so treat the upgrade like a controlled change OpenAI’s official GitHub release for rust-v0.157.0 marks Codex CLI 0.157 as a stable release published on September 25, 2026. This tutorial opens with a controlled upgrade procedure because the release changes how an operator can…

Read More Upgrade to Codex CLI 0.157 and Test the New Workflow: Background Server Startup, Conversation Forking, Remote Import, Draft Recovery, and Network Policy
Downloads

OpenAI Expands ChatGPT Ads to Seven Asian Markets: Availability, Free and Go Placement, Privacy Rules, Partner Access, and Measurement Boundaries
ByMarkos Symeonides September 25, 2026 Reading Time: 80 minutes

OpenAI brings ChatGPT Ads to seven additional Asian markets OpenAI announced on September 23, 2026 that ChatGPT Ads would begin rolling out in Indonesia, Malaysia, the Philippines, Singapore, Thailand, Vietnam, and Taiwan. The announcement positions the expansion as part of a broader advertising footprint that OpenAI says now covers more…

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AI News

Independent Frontier-AI Assessment Playbook: Preregistered Claims, Conflict Controls, Secure Access, Remediation, and Responsible Publication
ByMarkos Symeonides September 24, 2026 Reading Time: 73 minutes

What an Independent Frontier-AI Assessor Is Actually Being Asked to Do An independent frontier-AI assessment is a structured inquiry into specific safety claims, safeguards, evaluation results, incident evidence, or risk-management arguments made by an AI developer or deployer. In OpenAI’s September 2026 proposal on third-party assessments, the core object of…

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