Date: August 12th, 2025 1:32 PM
Author: chill internet user with one static pseudonym
https://www.reddit.com/r/ChatGPT/comments/1mo3gmf/gpt5_is_a_step_backward_real_testing_real/
GPT‑5 Is a Step Backward: Real Testing, Real Failures, More Tokens, Less Intelligence: The GPT‑5 DisasterSerious replies only :closed-ai: (self.ChatGPT)
submitted 8 hours ago by avrilmaclune
GPT‑5: The Illusion of Progress 🧠 Three days of technical testing reveal a massive step backward
OpenAI marketed GPT‑5 as the ultimate leap forward: More tokens, more context, more intelligence.
But after just three days of real-world, high-demand usage, the reality is undeniable: GPT‑5 is slower, less efficient, and deeply frustrating in actual complex tasks.
⚙️ ARCHITECTURE & LOOPS – Oversized reasoning, broken execution
GPT‑5 uses internal routing (Mixture of Experts) to select reasoning paths. Sounds brilliant. In practice:
🔁 Gets stuck in endless logic loops with basic conditions
❌ Fails at step-by-step execution
🧩 Cannot hold a consistent logical stack
🤯 Repeats, omits, and contradicts itself after just a few iterations
Test case (real use):
❌ Failed to reorganize a list of 20 tasks with nested conditions
⏳ Needed 7+ full passes to produce an incomplete result
✅ GPT‑4o handled the same task in one perfect shot
📏 TOKENIZATION INEFFICIENCY – More context, less real content
🧮 Uses more tokens per word (especially in non-English prompts)
💸 Up to 15% more token consumption than GPT‑4o
🧱 Shorter usable output despite bigger context window
🚫 Truncates large blocks more often
💰 Higher cost in API usage for the same functional result
🐢 LATENCY, FRAGMENTATION & FOCUS LOSS
🕓 Slower responses, even on basic prompts
🧠 Breaks thought flow mid-response
🔄 Loses continuity in subtasks
🧹 Memory handling is inconsistent
❗ Ignores permanent instructions across threads
Plus:
📂 Projects got randomly reordered
🕳️ Unclassified threads vanished
🧭 Navigating old chats became chaotic
🔍 Finding GPT‑4o sessions is a guessing game
🔒 REMOVAL OF MODEL SELECTION – Disrespect to Pro users
OpenAI removed the ability to choose previous models, without warning.
❌ You can’t pick GPT‑4o manually anymore
🛠️ Workarounds include reviving old threads or scripts
😡 No opt-out, no transparency, despite paying for full model access
This is not optimization. It’s forced migration and feature loss.
💸 HIDDEN COSTS – Time, attention, mental load
GPT‑5 doesn’t just cost more in tokens. It costs:
⌛ More time (waiting, retrying)
🧠 More mental energy (fixing flawed outputs)
😤 More frustration (due to broken logic and repetitive errors)
GPT‑4o just works. GPT‑5 makes you babysit it.
🧾 TECHNICAL SUMMARY – GPT‑4o vs GPT‑5 (3-Day Live Comparison)
• Logical tasks – GPT‑4o: efficient and consistent – GPT‑5: fragmented, looping, unreliable
• Token usage – GPT‑4o: compact and optimized – GPT‑5: bloated and costly
• Speed – GPT‑4o: fast and responsive – GPT‑5: noticeably slower
• Memory system – GPT‑4o: stable – GPT‑5: inconsistent
• Thread/project handling – GPT‑4o: clean and accessible – GPT‑5: chaotic and lossy
• User control – GPT‑4o: manual model selection – GPT‑5: locked, no choice
🛑 CONCLUSION
GPT‑5 is not progress. It’s a theoretical improvement with real-world failure points. If you’re a technical or power user: Go back to GPT‑4o — if you can still find it.
(http://www.autoadmit.com/thread.php?thread_id=5761614&forum_id=2],#49178420)