Coverage (30d)
9vs12
This Week
1vs2
Evidence
2 articlesRelationships
1Timeline
Codex API2026-06-19
Codex reached 5 million weekly users
ChatGPT2026-06-05
OpenAI launched dreaming memory system for ChatGPT that retains user preferences across sessions
Codex API2026-06-02
OpenAI merges Codex into ChatGPT, discontinuing the standalone API
ChatGPT2026-06-02
OpenAI merged Codex into ChatGPT
ChatGPT2026-05-16
ChatGPT market share fell below 50% for first time to 46.4%.
Codex API2026-05-15
Codex 'locked use' feature spotted on macOS for background AI coding
Codex API2026-05-15
Codex integrated into ChatGPT mobile app for iOS and Android
Codex API2026-05-11
Leaked screenshot shows OpenAI testing 'ultra-fast' latency mode for Codex
Codex API2026-05-01
Codex 5.3 update cut GUI latency 42%
ChatGPT2026-04-16
Market share decline from 77% to 57% over past twelve months
Ecosystem
ChatGPT
usesNvidia5 src
competes withClaude Code3 src
competes withClaude AI3 src
competes withGemini2 src
competes withAnthropic2 src
competes withClaude Opus 4.61 src
Codex API
usesClaude Code3 src
usesGitHub Copilot2 src
usesRecord & Replay1 src
usesModel Context Protocol1 src