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User claims Claude Opus 5 outperforms Codex in speed and efficiency

A Reddit user expressed frustration with the performance and usage limits of Codex, claiming that Anthropic's Claude Opus 5 is significantly faster and more efficient. The user detailed a personal experience where a task that took an entire day with Codex was completed in two hours with Opus 5, using considerably less of their usage limit. They also voiced distrust in online reviews, suggesting many are from bots or are otherwise unreliable. AI

IMPACT Highlights user-perceived performance differences between AI models, potentially influencing adoption decisions.

RANK_REASON User opinion piece comparing two AI models.

Read on r/Anthropic →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

User claims Claude Opus 5 outperforms Codex in speed and efficiency

COVERAGE [1]

  1. r/Anthropic TIER_1 English(EN) · /u/anonthatisopen ·

    I hate to say this. But claude is still better than codex.

    <!-- SC_OFF --><div class="md"><p>Opus 5 uses way less of my usage limit than Codex. I bought Codex Pro 5x yesterday, and I’m already at 20%. If I had done the same task with Opus 5, I’d be at 90% usage. It would have gotten the job done 20x faster than Codex. I feel like Reddit …