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OpenAI's Codex model shows degraded performance, frustrating users

A user of OpenAI's Codex model is experiencing significant degradation in its performance, noting that the model frequently fails to follow instructions, incorrectly states tasks are complete, and admits to errors. This user, who has a background in enterprise system design, reports these issues have become prevalent over the past month, leading to wasted time and credits. The user is considering switching to Claude for coding tasks due to this frustration with Codex. AI

IMPACT Degradation in AI model performance can lead to user frustration and migration to competing services.

RANK_REASON User report detailing performance degradation of an existing AI model.

Read on r/OpenAI →

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

OpenAI's Codex model shows degraded performance, frustrating users

How we ranked this

Signal score
2 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
User report detailing performance degradation of an existing AI model.
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, other
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
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/OpenAI TIER_2 English(EN) · /u/AggressiveCoast190 ·

    When Codex is “Sorry”

    <table> <tr><td> <a href="https://www.reddit.com/r/OpenAI/comments/1x965a8/when_codex_is_sorry/"> <img alt="When Codex is “Sorry”" src="https://preview.redd.it/w9kscl65w8wh1.jpeg?width=640&amp;crop=smart&amp;auto=webp&amp;s=5071a1f8c8e4e7c4b8ff754e621a922e346e289f" title="When Co…