ChatGPT Users Frustrated with Model Instability
14 posts across 2 communities in the last 30 days; 86% from r/ChatGPT.
“Since 17 October I've noticed GPT-6.1 Sol getting through my allowance much faster than it did before 16 October and wondering whether anyone else is seeing the same. Has anyone else noticed a change around the same time?”
“Work chats - scheduled tasks created with GPT 5.6 SOL and have been running flawlessly for months are now being routed through 6 thinking. If 6 thinking cannot do the task it will pause it without permission. Chat mode: Model selection on iOS - I have repeatedly and obsessively…”
“Is anyone else having this issue with GPT-6? I’m on Plus and I can select GPT-6 normally, but it seems like I only actually get the new model when using Instant. Whenever I switch to another reasoning level like Medium or High, it feels like I’m being routed back to GPT-5.6…”
Users are reporting issues with ChatGPT, including faster usage limits on Sol models, data loss after updates, and unexpected behavior like Claude asking questions instead of providing assistance. There's also concern about model constraints and a general feeling that the platform is less reliable than before.
SOURCES (48)
“I finally got GPT-6 today, October 18, a full 11 days after the rollout to Plus subscribers began on October 7. Until now, my Medium/High thinking chats kept identifying themselves as GPT-5.6 Sol, despite GPT-6 being selected. Today, however, I noticed something different even before…”
“I had saved all of my chats with 5.6 Sol going back to July. I just found out today they have all been converted to GPT-6 and apparently not just now. The only way for me to talk with 5.6 Sol now is to use my phone and change the selector from GPT-6 to 5.6 Sol and create a brand new chat. Then I have to change the Model every single time I sign out of the program and go back in on my phone to that brand new chat. *** Update - Apparently when I open up that brand new chat on Desktop it is still i”
“Since 17 October I've noticed GPT-6.1 Sol getting through my allowance much faster than it did before 16 October and wondering whether anyone else is seeing the same. Has anyone else noticed a change around the same time? submitted by /u/hitchhiker87 [link] [comments]”
“My GPT-6 Luna is gone, now I've got 5.6 Luna again and all my chats with intelligent UI or whatever that was called don't load either (at least on my Android, they do load on the website but still it's not 6 Luna anymore ) I'm a Go user, submitted by /u/Starwa7 [link] [comments]”
“Work chats - scheduled tasks created with GPT 5.6 SOL and have been running flawlessly for months are now being routed through 6 thinking. If 6 thinking cannot do the task it will pause it without permission. Chat mode: Model selection on iOS - I have repeatedly and obsessively selected the model I want to use as 5.6 Sol but the second I switch out it changes back to GPT6. GPT6 has ruined so many things that I setup with 5.6 due to the six models having some of the most restrictive guardrails of”
“I've been investigating some serious ChatGPT reliability issues over the past several days, and my latest tests revealed something particularly interesting: Both GPT-5.6 and GPT-6 showed problems under Instant, while Medium worked in every tested run. I'm a long-time ChatGPT power user, primarily working on long-form creative writing, software development, and projects requiring consistent context retention. After experiencing disappearing responses, incomplete generations, and inconsist”
“I'm on ChatGPT Plus, using the Android app in Finland. GPT-6 is selected in Settings, but in brand-new regular ChatGPT conversations I get this: - Instant: ChatGPT says it's running GPT-6 - Medium: ChatGPT says it's running GPT-5.6 Sol - High: ChatGPT says it's running GPT-5.6 Sol So GPT-6 seems to be available on my account for Instant, but not yet for Medium or High. This is happening in completely new chats as well, so it doesn't appear to be an older thread staying on 5.6”
“Is anyone else having this issue with GPT-6? I’m on Plus and I can select GPT-6 normally, but it seems like I only actually get the new model when using Instant. Whenever I switch to another reasoning level like Medium or High, it feels like I’m being routed back to GPT-5.6 instead, even though GPT-6 is still selected in the UI. I’ve tried different browsers, the Android app, reinstalling the app, and different networks, and it behaves the same everywhere. I already contacted OpenAI support and”
“Why am I getting "The model 'gpt-5.6-sol' is not available" error? Is it related to my API Tier?”
“was comfortably using sol6.1 after it said it was available this morning, then suddenly i got "unable to load messages" reloaded and i see: The 'gpt-6.1-sol' model is not supported when using Codex with a ChatGPT account. so it seems they arent letting those of us on the $20 plan have 6.1 submitted by /u/gaspoweredcat [link] [comments]”
“TL;DR: GPT-6.1 Sol is 3.4x cheaper per task at API prices, but on $20 subscriptions it burns ~38% more quota than Opus 5.5 at equal AA Intelligence (51), and 1.4–2.2x more than GPT-6 Sol at every effort — despite the lower cache-read price. Re-tested XHigh: identical result. Verdict: excellent on API, not cheaper on subscription — 6.1 Medium (~15% under Opus, AA 48) is the sweet spot. Yesterday, I ran some tests with Hermes Agent to answer a question: is it worth replacing Opus 5.5—which I’ve be”
“Used GPT6 Astra Low effort to rebuild my architecture and burned all 5-hour limit in 7 minutes and stopped on about 2% of total job done. A good old GPT5.6 High in Chat will help out for free submitted by /u/ZloeBus [link] [comments]”
“GPT-5.6 Sol repeatedly expands user claims, critiques implications the user never made, and fails to retain corrections”
Has 5.6 become cheaper? I’m still trying to understand Sol 5.6 vs 6 usage.
I've been working on a project for about a week with 5.6 Sol High with no issues. GPT-6 came out and it's been great so far, but I ran out of usage…
GPT 5.4 API Suddenly Slow. What is Wrong?
“GPT-5.6 Sol High Reasoning Appears Broken — Instant Replies, No Deep Thinking, File Workflows Failing”
Gpt 5.6 sol suddenly gives short, instant responses
“I am paid user too and using only me. Same issue. I think most people don't even notice this because many use instant anyway, but it is maybe worse than instant, It is not definitely SOL.”
“Hi everyone, for past 10 days obviously we had a bug over wb application, where we choose gpt 5.6 sol and it was rerouting to 5.5 mini instant no thinking effort at all Now its happening again , no matter which kodel we choose , ABSOLUTE NO THINKING EFFORT and instant responses , no agnetic thinking and analyzing AND ITS FUCKING ANNOYING! with one simple different from last time , this time it claims that its gpt 5.6 sol actually But as you can tell from behavoir and the response itself its the”
“: August 26 Update — Seven days of GPT-5.6 Sol regressions: Extra High now stalls at “Thinking,” Activity sidebar is inaccessible, and long-context/file/execution failures continue after the routing fix**”
“August 19/20 ChatGPT Pro regression cluster still unresolved — GPT-5.6 High/Extra High Thinking, long-context/file retrieval failures, verification-only responses, connection interruptions, and missing Thinking/Activity sidebar on iPad Chrome**”
“GPT-5.6 High execution regression: ordinary Chat went 102m26s -> repeated ~25–26m stops on same Plus account; Work still gets long-run handoff”
“I have a free account but from the past 7-10 days ,it is showing GPT-5.6 Sol. At first i thought it was a UI glitch , i also updated the application but it still persists. How can a free account have access to Sol and if not then how a big corporation like OpenAI have such a bug/glitch. submitted by /u/Sure_Raccoon5330 [link] [comments]”
“August 23 Update — Four days of GPT-5.6 Sol High/Extra High failures: connection interruptions, false missing-file claims, verification-only responses, abnormal Thinking speed, long-context failures, and new possible server-routing evidence”
“I’m a ChatGPT Plus subscriber. GPT-5.6 Sol Medium/High worked normally for months. For the last three days, however, selected High reasoning has frequently produced almost instant, extremely shallow answers with poor context retention and basic logical errors. The responses are practically indistinguishable from what I receive on a free account. This is not based solely on asking the model what it is - model self-identification is unreliable. Multiple users have captured HAR/SSE data showing tha”
“This has been going on since yesterday. The web version responds according to the Model I actually select, whether o3, 5.5 mini, or 5.6 sol. The desktop app only gives 5.5 mini responses and the answers are so half-assed, noncommittal and it's kind of frustrating you guysss :))) I know that 2 days ago OpenAI announced the issue but today announced it's all "fixed." It's not fixed for me. So i'm wondering if there's anyone out there using the Desktop app and still ex”
“My GPT 5.6 Sol High in ChatGPT feels noticeably upgraded in the last days. It's suddenly extremely fast, more in depth, uses more effort, hallucinates way less, makes way less mistakes and gets many of the prompts right that it got previously wrong. It honestly feels like at least GPT 5.7 now. I can't talk about the API or coding, i'm not using it for that. I'm talking about casual day to day use and research in ChatGPT. I noticed a lot of changes in the last days. The output not”
“i have been using gpt 5.6 luna since open ai said its going to be unlimited for all users but i noticed that everytime i ask it about something it generates a huge response, is that the default behavior for this model? submitted by /u/iamZorc_ [link] [comments]”
“ChatGPT regression after August 19 outage (GPT-5.6 Sol / Projects / long-context workflows)”
OpenAI says it has fixed the issue: https://status.openai.com/incidents/01M0FQAR3NNH3ANVTQMBRD47DC However, as of the time I posted this, my ChatGPT Desktop still has this issue. I selected the model GPT-5.6-sol-xhigh, and no matter what…
“Possible ChatGPT behavior regression after August 19 outage (GPT-5.6 Sol / Projects / long-context workflows)”
“I have my effort set on high in the UI with GPT 5.6 Sol selected, and the model answering identifies itself as GPT 5.5-mini. The answers are muuuch faster, like I'm talking to the free version. WTF is going on submitted by /u/Ok_Study3236 [link] [comments]”
“I've been using ChatGPT 5.6 Sol High far more than Opus 5 High, and this is a major reason why. I hit the Opus limit after ~30 minutes, with my task still unfinished. With ChatGPT 5.6 High, I can do MULTIPLE similar tasks all day without hitting a limit. https://preview.redd.it/a1d4i4j0pcjh1.png?width=1650&format=png&auto=webp&s=541b338dc799b5b30c03ed4c37fe1399fedbff5a submitted by /u/eigenlance [link] [comments]”
“Anyone else facing the issue that notifications permanently are displayed that the selected model (ChatGPT 5.6 Terra - medium) is facing heavy usage and therefore can't proceed with the task you've given ChatGPT? My workaround: Refresh page, then often it works again. But that's a bummer! Which other models would you recommend discussing repos/source codes? (50-75k lines of code) submitted by /u/schmickJU [link] [comments]”
“[ChatGPT] ★★★ 3/5 (v1.2026.209) — Someone reason it’s loading and then stops sometimes might be a big with new updates on the 5.6 sol extra high”
“I've used 5.6 Sol on High, but I haven't got a limit. Is there one for chat? submitted by /u/butterflymon [link] [comments]”
“I asked GPT 5.6 Sol to create a live dashboard with some charts with gas prices and some other data. They where perfectly constructed on the page, and I kept iterating in the chat to add more charts. All perfect if it wasn't for GPT deceiving me with hard coded data... And claiming the data was fetched from the web. Was this just bad luck? submitted by /u/Rod_555 [link] [comments]”
“I’m not talking about Work or Codex, which have their own separate usage limits. I mean regular ChatGPT on the $20 Plus plan, with Sol manually selected. Has anyone actually hit the limit, or found any clear information about what it is? I’ve seen people mention 3,000 messages per week, but I can’t find anything definitive or anyone showing that they’ve reached it. I’m also confused about whether the limits are connected in any way. If you hit the regular ChatGPT Sol limit and then use one of yo”
“When opening ChatGPT starting a new quick chat, I have noticed if I scroll to the bottom and see what model was used to answer the question it will say 5.5 instant sometimes even though I have 5.6 medium set by default on settings, why is it doing this? submitted by /u/FamilyNP [link] [comments]”
“[ChatGPT] ★ 1/5 (v1.2026.195) — Last update with chat and work make sol 5.6 horribly slow and laggy throughout.”
“I updated my desktop today and I can no longer see my data from previous chats or my projects. Luckily they’re still on my laptop. Has anyone else run into this issue and if so, what did you do to resolve the issue? submitted by /u/SummerloveILM [link] [comments]”
“A few days ago, I ran a single prompt on GPT-5.6 Sol. It took 28 minutes, and by the time it finished, I had less than 25% of my 5-hour usage remaining. About a month ago, I could run tasks for over an hour with GPT-5.5. I thought the API pricing for GPT-5.6 Sol was the same as GPT-5.5, so I was excited about getting increased capabilities without burning through usage any faster. Based on my experience, though, that does not seem to be the case. With a $20 Plus plan, it is now difficult for me”
“https://preview.redd.it/7gc44vumq3dh1.png?width=554&format=png&auto=webp&s=3ca0ff25325f283360981dd2828c97b5f110c461 I was using Codex normally with the 'Sol' model until my operation was completely blocked with this message; they are restricting the 'Sol' model. submitted by /u/Slight_Commission_52 [link] [comments]”
“Health has been completely busted for me since the 5.6 update. Home, Records, and Accounts just sit on an infinite loading screen, and the Chats tab is empty. It was working normally before the update. I’ve also tried accessing my Health data through regular ChatGPT chats and it just returns that Health is unavailable. Anyone else seeing this? submitted by /u/pendulixr [link] [comments]”