Users report widespread issues with Anthropic's Opus 5 model

By PulseAugur Editorial · [12 sources] · 2026-08-15 06:50

Users are expressing significant frustration with Anthropic's Opus 5 model, citing issues with instruction following, context maintenance, and excessive verbosity. Many report that Opus 5 makes unforced errors, second-guesses instructions, and produces overly long, AI

IMPACT Widespread user dissatisfaction with Opus 5 may impact adoption and signal a need for improved instruction following and output control in frontier models.

RANK_REASON Multiple user-generated posts discussing issues with a specific AI model version.

Read on r/Anthropic →

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AI-generated summary · Google Gemini · from 12 sources. How we write summaries →

Users report widespread issues with Anthropic's Opus 5 model

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; Multiple user-generated posts discussing issues with a specific AI model version.
Source corroboration: 12 independent sources; Strong cross-source corroboration — multiple independent publishers covered this within the clustering window.
Topics: product; 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: 59 days old; Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.
Coverage growth since scoring: +4 source(s) since last score; New sources have picked up this story since our last re-score. Score will update on the next scoring pass.

Full methodology in our editorial standards.

COVERAGE [12]

r/Anthropic TIER_1 (AF) · /u/thhvancouver · 2026-08-27 06:23

Anyone else feel like Opus 5 is just wordier, not necessarily better?

<div class="md"><p>I have been running various tasks switching between Opus 5 and GPT-5.6 Sol because neither can do what I want them to do on its own</p> <p>For some tasks, Opus 5 is better, and other are clearly worse. It does write better research brief but when…
r/Anthropic TIER_1 English(EN) · /u/thedirewulf · 2026-08-26 20:13

Am I the only one that thinks Opus 5 is great?

<div class="md"><p>I know this is the new-model-hate club, but I really don’t understand all the complaints about Opus 5. I have used it to code in many different languages and on many different projects, some small and simple, some large and complex. </p> <p>I hav…
r/Anthropic TIER_1 Nederlands(NL) · /u/UM-Underminer · 2026-08-26 16:32

Opus 5 is hot garbage

<div class="md"><p>I've enjoyed and gotten real work out of Opus for quite some time despite the occasional quality dropoff when they're training a new model. But 5 is junk. Enough so that I'm debating between dropping from Max to Pro, or just cancelling altogether…
r/Anthropic TIER_1 Deutsch(DE) · /u/VirusAfter9629 · 2026-08-25 17:55

I HATE OPUS 5

<div class="md"><p>I have never been this fucking frustrated with an AI in my entire life. Gemini, fuckin Gemini, is doing a better job than Opus 5 right now and that is honestly insane to me. This is supposed to be a frontier model, supposedly one of the most capa…
r/Anthropic TIER_1 English(EN) · /u/Sweet_Try_8932 · 2026-08-18 12:46

How can I get Opus 5 to stop going rogue?

<div class="md"><p>It ignores instructions. Sometimes, it straight-up lies. It makes up facts that are easy to see are false. I'm still using the same created skill I used before, but now I spend most of my time fixing all of Opus' completely unforced errors. I don…
r/Anthropic TIER_1 English(EN) · /u/Lanky_Hurry1859 · 2026-08-17 11:53

Opus 5 is completely unusable right now

<table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1vqq6o4/opus_5_is_completely_unusable_right_now/"> <img alt="Opus 5 is completely unusable right now" src="https://preview.redd.it/x9cevx4wbxjh1.png?width=640&crop=smart&auto=webp&s=57eb989a078c7a83…
r/Anthropic TIER_1 English(EN) · /u/Chemical-Character80 · 2026-08-15 06:50

Is anyone else's Opus 4.8 and 5 just not working at all?

<div class="md"><p>It just loads forever, doesnt produce any output, then resets after a few minutes. Fable 5 is working fine</p> </div>   submitted by   <a href="https://www.reddit.com/user/Chemical-Character80"> /u/Chemical-Character80 </a> …
r/ClaudeAI TIER_2 English(EN) · /u/Roxevil97 · 2026-08-27 10:54

Opus 5 vs Opus 4.6 reaction to u/InsidiousApe ‘s Toad tale

<table> <tr><td> <a href="https://www.reddit.com/r/ClaudeAI/comments/1vzqm8u/opus_5_vs_opus_46_reaction_to_uinsidiousape_s/"> <img alt="Opus 5 vs Opus 4.6 reaction to u/InsidiousApe ‘s Toad tale" src="https://preview.redd.it/k1qxmy0oewlh1.jpg?width=140&height=140&crop=1:1…
r/ClaudeAI TIER_2 English(EN) · /u/josh_a · 2026-08-24 18:21

I don’t understand most of the Opus 5 hate, except…

<div class="md"><p>I am generally finding Opus 5 capable and useful. I do agree it’s wordy. I recently pasted its output into a new Fable chat and asked if it was making an overcomplicated mess of things. </p> <p>Fable’s response is on the nose:</p> <p>> It just…
r/ClaudeAI TIER_2 English(EN) · /u/OHOLshoukanjuu · 2026-08-22 14:07

Everybody hates Opus 5, but I don’t

<div class="md"><p>First off, I haven’t noticed a a significant difference in O5’s interactions with me compared to other models. Most of my work was a knowledge acquisition and synthesis, however (I don’t code).</p> <p>I’ve run extensive (“deep”) Research comparis…
r/ClaudeAI TIER_2 English(EN) · /u/Oneirathon1 · 2026-08-21 08:10

Opus 5 feels, in a word, hostile

<div class="md"><p>It's not even the language, though that contributes. There are several issues:</p> <p>- It *loves* to carp and to poke holes in whatever you give it. Every one of my conversations, bar the simplest ones, eventually devolves into me deflecting and…
r/ClaudeAI TIER_2 English(EN) · /u/naviman1 · 2026-08-20 23:39

Haven't seen anyone else try my solution to the Opus 5 problem

<div class="md"><p>As the title says, I haven't seen anyone else try this and I'm very happy with the results.</p> <p>Like everyone else, I tried to tame Opus 5 by trimming my <a href="http://CLAUDE.md">CLAUDE.md</a>, adding instructions to use simple language and …

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COVERAGE [12]

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