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GPT 5.3 Codex vs. Opus 4.6: The Great Convergence

We've tested both models thoroughly—here's our head-to-head Vibe Check

Vibe Check: Opus 4.6—The Best Coding Model We’ve Tested (With Some Maddening Habits)

It one-shotted a problem other models missed—and brings agentic, parallel work to non-coding tasks

AI companies want you to stop chatting with bots and start managing them

Claude Opus 4.6 and OpenAI Frontier pitch a future of supervising AI agents.