OpenAI, "Codex for (almost) everything" (2026-04-16)
https://openai.com/index/codex-for-al...

OpenAI, "Introducing GPT-5.5" (2026-04-23)
https://openai.com/index/introducing-...

OpenAI, "OpenAI models, Codex, and Managed Agents come to AWS" (2026-04-28)
https://openai.com/index/openai-on-aws/

GitHub, openai/codex releases
https://github.com/openai/codex/releases

TickerTrends Research, "OpenAI Codex Surpasses Claude Code in Downloads Following April 30 Inflection" (2026-05-04)
https://blog.tickertrends.io/p/openai...

Reddit r/codex, "OpenAI Codex Surpasses Claude Code in Downloads"
  / openai_codex_surpasses_claude_code_in_down...