How Codex Happened: inside OpenAI's comeback in coding
danshipper · x · 2026-10-16
Dan Shipper's deep dive for Every chronicles Codex's turnaround: a year ago it was a scrappy OpenAI side project whose cloud product missed PMF. Less than 12 months later, it has swallowed the flagship ChatGPT desktop app from the inside (running as com.openai.codex on Mac) and become the centerpiece of OpenAI's coding comeback and the foundation for everything the company builds next. Includes a firsthand account of testing GPT-5 at OpenAI's Mission Bay office the night before launch.
Related event: Every's "How Codex Happened" Chronicles Codex's Comeback(13 posts)→
More from coding & agent
- Claude dev Felix Rieseberg's tutorial: 4 ways to be more ambitious with AI — daniel_mac8 · 2026-10-16
- Are the fastest GPU kernels now written by AI? Kernels are hyper-verifiable, argues one dev — fleetwood___ · 2026-10-16
- Anthropic lead engineer's 4-question prompt makes agents more ambitious, now a free skill — daniel_mac8 · 2026-10-16
- ChainForge dev shows 'feature map' for orchestrating subagents on large PRs — IanArawjo · 2026-10-16
- aiDotEngineer benchmarks agent orchestration pipelines, staging humans as Foreman and workers — vikvang1 · 2026-10-16
- Developer mass-produces 200 videos in hours using Claude Code + Hyperframes — mcraddock · 2026-10-16