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AI Summary
- Claude Opus 4.6 and GPT-5.3 Codex released same day with different philosophies: Opus uses autonomous agent teams while Codex favors interactive pair-programming
- Live head-to-head race building a Polymarket competitor shows Codex finishes in under 4 minutes while Opus agents use more tokens with different architectural approach
- Opus 4.6 setup in Claude Code enables agent teams; choice between models depends on whether you want autonomous execution (Codex speed) or collaborative iteration (Opus depth)