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User finds OpenAI's Codex 10x slower than Anthropic's Claude

By PulseAugur Editorial · [1 sources] ·

A Reddit user expressed frustration with the performance of OpenAI's Codex model, finding it significantly slower than Anthropic's Claude. The user noted that Codex's throughput was approximately 10 times slower and its harness was inadequate for parallelized work with subagents. They concluded that Codex was essentially useless for their work, contrasting it with the superior performance of Claude. AI

IMPACT Highlights potential performance gaps between leading AI models, influencing user choice and development priorities.

RANK_REASON User opinion piece on model performance.

Read on r/OpenAI →

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

User finds OpenAI's Codex 10x slower than Anthropic's Claude

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
User opinion piece on model performance.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, opinion
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Same-day
Cluster formed today. Ranking reflects the current source set at time of score.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/OpenAI TIER_2 English(EN) · /u/rgujijtdguibhyy ·

    How the hell are you guys able to use codex?

    <!-- SC_OFF --><div class="md"><p>It's so damn slow compared to claude. Like probably 10x slower tps. The harness is also pretty bad for doing a lot of parallelized work through subagents. Claude code seems so much better, I have like 4x claude max plans and bought one chatgpt pl…

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