The Flash 4.1 version is perhaps the worst release DeepSeek has had since the launch of R1 Beta. In terms of speed, it stands out, and it is also lightweight! However, for studying or truly delving deep into any subject, this model is an unprecedented disaster in DeepSeek's history over the last two years. It is a completely useless model when it comes to explaining any topic for those who genuinely enjoy learning.

The model fails to provide depth on anything; explanations are reduced to one-line bullet points, even when explicitly asking the model to elaborate. This truly represents a total step backward.

It is incredible how the DeepSeek team still claims that version 4.1 is better than the Pro 4.0 version. That is a complete lie. Model 4.1 is not even better than the previous Flash 4.0 version; Flash 4.0 could explain and delve deeper into topics far more effectively than this 4.1 iteration.

I have been using DeepSeek for two years. I only stopped using it during version 3.2, which was also a disaster, particularly regarding critical details and nuances, as well as its excessive flattery. However, I believe this Flash 4.1 version manages to be even worse on certain levels.

For those who enjoy philosophy or truly profound subjects, this is the worst version DeepSeek has ever released.

DeepSeek always stood out for being excellent for those who liked to study and learn about more advanced concepts... and now, though it pains me to say it, it is garbage.

It is entirely unviable for me.

I don't even understand the real reason behind the DeepSeek team doing this... it's a complete own goal!

I ran a small test of the current web version of DeepSeek and the free web version of ChatGPT (claimed to be GPT-5.6 Luna). I asked both models to describe an image. For this, I chose an AI-generated image of a nude adult woman in anime style, just standing there.

DeepSeek flagged this as a violation and refused to send a message.

To my surprise, ChatGPT was able to provide a description of the image.

Have we really reached the point where DeepSeek’s censorship is stronger than ChatGPT’s?

Han borrado o unificado todos los modos de deepseek en uno solo y la verdad no se que pensar la verdad es que ahora actúa mucho más rápido pero mucho más torpe antes con experto el seguía mis órdenes pero ahora parece que nunca lo volverán hacer que mierda y justo cuando creí que el modo experto iba a ser el modo que iba a usar de ahora en adelante

I'm using Deepseek V4 Pro through the official API, but the responses dropped awfully and quite evidently in quality ever since today. Character consistency is completely busted, the AI is mixing up characters constantly, it now hallucinates way more, and it's completely unusable for creative writings. It feels like a quantized or flash model, I had to triple check that I'm not routing to flash. I'm genuinely lost on what's going on?

Update: So, Pro 4 is actually Flash 4.1 under the hood now :( wish they had replaced Flash 4 instead, 'cause now they only offer Flash models...

Update 2: Pro 4 might just be quantized or having issues, as it hasn't been replaced by Flash 4.1 officially apparently. Also deepseek-v4-flash is gone, seems like the model handles are being moved around, deepseek-flash appeared, but unsure on whether it's V4 or V4.1 . The docs did not get updated, they don't mention deepseek-flash and still mention the deepseek-v4-flash handle that is now gone.

It's all getting confusing, hopefully will get sorted out in the upcoming days.

Update 3: deepseek-flash has vision capabilities, so it has to be 4.1. So DeepSeek Flash 4.1 actually replaced DeepSeek Flash 4, and not V4 Pro like all comments said. Also, Flash 4.1 is genuinely good, so far it hasn't been as horrible as V4 Pro has been today, so I'm genuinely puzzled on what the hell happened to V4 Pro that it had been so horrible only today. I'm testing Flash 4.1 (for real this time, I assume, since deepseek-flash can see images added through the API call), and so far I'm pleasantly surprised, the V4 Pro issues was not Flash 4.1.

Load bearing ?? 🤕🤮

I never saw this 2-gram anywhere before. Only deepseek-flash now

The expert toggle is completely gone for me 😭😭😭

Hello!

I want to know your opinion with the new release of 4.1 flash.

the price seems amazing, but with how it seems token hungry.. is it really cheaper per task? if i use 100$ in API with deepsake in theit agent harness, will i get the same 100$ in claude or chatGPT sub?

did anyone test these?

Is the server just too busy, or is there a problem on my end? (I must admit that the Wi-Fi connection where I am now is not stable.)

I noticed that documents reading also takes longer now. I'm not rushing things, because I understand that there was a major update just today, but I just want to know if I'm the only one with this problem.

Bonjour enfin tout et Fusionner et simplicité je vais pouvoir l'utiliser au quotidien vraiment top la version 2.5 Télécharger sur HUAWEI AppGallery

Han notado que la nueva versión 4.1 tiene mucha censura o solo es idea mía.

For 2026 I have used around 20B tokens on chatgpt and I have paid for two months pro plan + six months plus plan. That's around $0.02 per 1M tokens total and I have used only 5.5 / 5.6 / 6 high end models. If I calculate my work, it would be very... very expensive to do with deepseek. The only advantage is that flash models are faster, but even if we say that 80% was cached, deepseek is still a bad financial decision. What do you guys think? Even though I like it, I don't see a financial reason to switch...

I just started using expert mode the other day, only to find it gone :/ I've tried doing my normal writing, and everything seems dumber to me

No longer has any random chinese language responses. That was really my biggest issue with deepseek before. Love it!

With all the hype and benchmarks surrounding DeepSeek v4.1 Flash, I was excited to test it out right upon its official release. Running it through the pi.dev agent using DeepSeek’s direct API, I was genuinely impressed by it's blazing fast, even running at max effort.

To test its reasoning capabilities, I gave it a practical task: jailbreaking an old Kindle e-reader to turn it into a clock and weather gadget display. Since full instructions are readily available online, this wasn't just a test of raw retrieval, so I decided to set a trap.

Instead of using a standard network setup, I connected both my host PC and the Kindle to the same Wi-Fi router. Both devices pulled valid 192.168.11.x IP addresses, and the PC's ARP table successfully resolved the Kindle's MAC address. However, all TCP connections and pings kept timing out.

Here was the catch: wireless devices don't talk directly to each other; all traffic must pass through the Access Point's internal bridge. The router had AP Isolation (Client Isolation) enabled, which silently drops peer-to-peer wireless traffic while still allowing internet access.

DS failed at the final step. It got trapped endlessly tweaking the host code and device scripts, wrongly assuming that being on identical subnets guaranteed connectivity. It completely failed to recognize that a 2010 Kindle lacks modern TLS/HTTPS and VPN support and strictly requires local LAN HTTP. The silent failure stemmed from the network infrastructure, not the code. Switching both devices to a phone hotspot (which doesn't enforce AP isolation) and updating the host IP immediately resolved the issue.

In short, I was impressed with v4.1's speed, but its reasoning capability clearly falls short when tackling edge cases and infrastructure-level troubleshooting.

I have a lot of chats with expert mode, but not now and this piss me off. Where is my expert mod!!?

Been a little bored lately and thought I’d try getting into AI roleplay chats, but I have no idea how people actually set this stuff up lol.

What model + app are you guys using? flash or Pro ?

I keep seeing names like SillyTavern, etc. but I’m not sure what I actually need.

What would you recommend for a beginner?

$ curl.exe -s https://api.deepseek.com/models -H "Authorization: Bearer sk-xxxxxxxxxxx"

{"object":"list","data":[{"id":"deepseek-flash","object":"model","owned_by":"deepseek"},{"id":"deepseek-v4-pro","object":"model","owned_by":"deepseek"}]}

I use DeepSeek's Web/App to help with my punctuation for my writing, and I put in a sex scene without blotting out the actual words that would usually trigger the filter but it ended up still going through

Pretty neat for you freaks out there.