Best DeepSeek Model for Roleplay (2026): V4.1 Flash or V4 Pro?
The best DeepSeek model for roleplay is DeepSeek V4.1 Flash. It is the newest model DeepSeek sells, it has a 1M-token context window, and it is also the cheapest. DeepSeek V4 Pro is still on the API at about four times the price, and DeepSeek itself says the Flash model beats it. Pick V4 Pro only if you have tried both and prefer how it writes.
That is a short answer, because DeepSeek’s lineup is now short. In 2025 the question was “V3 or R1”, and then “chat or reasoner”. Both of those questions are dead. There are two models on DeepSeek’s price list today, and one setting — thinking mode — that matters more for roleplay than the choice between them.
Everything below was checked on DeepSeek’s price list, change log, thinking-mode guide and release notes, and on OpenRouter’s and Hugging Face’s model lists, on 1 October 2026.
A note on method. We have not run a controlled, model-by-model roleplay test of these two models. V4.1 Flash is three weeks old. The advice on this page comes from what DeepSeek publishes about each model, what each one costs over a real campaign, and how a roleplay frontend actually talks to the API. Where DeepSeek compares its own models, we quote DeepSeek, and we say so.
For the wider question of DeepSeek against Claude, ChatGPT, Gemini and Grok, see the best LLM for roleplay. For what DeepSeek is and why roleplayers like it, see DeepSeek for roleplay. This page only answers which DeepSeek.
The Current DeepSeek Models at a Glance
| DeepSeek V4.1 Flash | DeepSeek V4 Pro | |
|---|---|---|
| Model name on the API | deepseek-flash | deepseek-v4-pro |
| Released | 10 Sep 2026 | 13 Aug 2026 (version 0813) |
| Context window | 1M tokens | 1M tokens |
| Input, peak hours | $0.30 per million tokens | $1.32 |
| Output, peak hours | $1.20 | $3.96 |
| Input already in cache, peak hours | $0.006 | $0.044 |
| Off-peak | Half of every price above | Half of every price above |
| Thinking mode | On by default, can be turned off | On by default, can be turned off |
| Reads images | Yes | No |
Three things in that table are worth a second look.
The newer model is the cheaper one. DeepSeek’s release note for V4.1 Flash says its new design lets the company “serve more users at a lower cost”, and that it is passing the saving on.
Both models have the same 1M-token context window. With DeepSeek you do not pay more to get a longer memory. The older DeepSeek models that are still hosted elsewhere stop at about 164,000 tokens.
Every price has two levels. DeepSeek charges full price at peak hours and half price the rest of the time. That is unusual, and it changes when it is cheapest to play. More on that below.
Which DeepSeek Model to Pick
DeepSeek V4.1 Flash — the default
DeepSeek calls V4.1 Flash “the smallest model in our new architecture family”, built for “faster inference” and “higher throughput”. For roleplay, speed is the thing you feel on every turn, so a model built for speed is a good start.
The stronger argument is DeepSeek’s own comparison. Its release note says:
“Tests by multiple parties put V4.1-Flash ahead of V4-Pro on performance, cost, speed & total runtime.”
Be careful with that sentence. The tests DeepSeek publishes are coding, reasoning and agent benchmarks. None of them measures prose, character voice or how well a model keeps a scene going. So it tells you V4.1 Flash is the more capable model in general. It does not tell you that it writes a better tavern scene. We have not tested that, and DeepSeek has not published it.
What we can say for certain is this: V4.1 Flash is newer, faster by DeepSeek’s account, has the same context window, and costs a quarter as much. When all four of those point the same way, it is the default.
DeepSeek V4 Pro — only if you prefer how it writes
V4 Pro has had a strange month.
On 10 September, DeepSeek said it was “phasing out V4-Pro”. From 14 September, every request to deepseek-v4-pro would quietly be answered by V4.1 Flash instead, “until V4.1-Pro launches”.
Then it changed its mind. The change log now reads:
“In response to user demand, we have decided to continue providing API services for DeepSeek V4 Pro after September 14, 2026, with the billing method remaining unchanged. We will provide further notice should there be any changes.”
So V4 Pro is still there because users asked to keep it. That tells you two things. Some people do prefer it, for their own work. And it is living on a “further notice” — DeepSeek has already tried to switch it off once, and a V4.1 Pro is expected to replace it.
For roleplay, that makes V4 Pro a matter of taste, not a step up. Some players get attached to how one model writes, and that is a fair reason to pay more. If you want to know whether you are one of them, run the same scene on both for an evening. If you cannot tell the difference, stay on Flash. And do not build a months-long campaign around V4 Pro’s voice, because it may not be there in three months.
Thinking On or Off? The Setting That Replaced “Chat vs Reasoner”
Older guides tell you to choose between deepseek-chat (fast, writes naturally) and deepseek-reasoner (thinks first, slower). Both names were retired on 24 July 2026. DeepSeek’s note says they would be “fully retired and inaccessible” after that date.
The choice itself did not go away. It became a setting. Both current models have a thinking mode: before the model answers, it writes out its reasoning, then gives the reply. Two facts from DeepSeek’s guide matter here:
- Thinking is on by default, at the effort level “high”. There are three levels: low, high and max.
- You can turn it off with a parameter in the request.
So if you connect a frontend to DeepSeek and change nothing, you get what used to be called the reasoner, not what used to be called chat. That is the opposite of what most 2025 guides assume.
Which should you use for roleplay?
| Your game | Setting | Why |
|---|---|---|
| Fast, chatty scenes; one character; short replies | Thinking off | Replies start sooner, and your temperature setting works |
| A campaign with stats, inventory, factions or strict rules | Thinking on, low or high | The model checks the rules and the history before it writes |
| Almost never | Thinking on, max | Built for hard problems; slow and expensive for a conversation |
Thinking costs you twice. You wait while the model reasons, and you pay for the reasoning text as well as the reply. On a model this cheap the money is small, but the wait is real.
One practical problem: not every frontend lets you change this setting. If yours has no control for it, you get the default — thinking on, at high. In SillyTavern or a similar tool, look for a reasoning or thinking option in the connection settings. If the reply takes a long time to start, thinking is probably on.
Why Your Temperature Setting May Do Nothing
“Best temperature for DeepSeek” is one of the most searched questions about it. The honest answer starts with a fact most guides miss.
In thinking mode, DeepSeek ignores temperature. Its guide says thinking mode “does not support the temperature, presence_penalty, or frequency_penalty parameters”, and then:
“for compatibility with existing software, setting these parameters will not trigger an error but will also have no effect.”
Read that again, because it explains a lot of confusion. You can move the temperature slider from 0.7 to 1.5, nothing breaks, and nothing changes. Thinking is on by default. So for many players the slider is not connected to anything.
The same guide says top_p is limited too. In thinking mode, values below 0.95 are treated as 0.95. With thinking off, it is fixed at 1.0 and your value is ignored.
So the real rule is:
- Thinking on: do not bother with temperature or the penalty settings. Shape the style with your prompt.
- Thinking off: temperature works. DeepSeek’s own table recommends 1.3 for general conversation and 1.5 for creative writing. The default is 1.0.
This is also the fix for a common complaint, that DeepSeek repeats itself. Raising the repetition penalties only helps if thinking is off. If it is on, those settings do nothing either. Our SillyTavern presets guide explains what each of these fields is meant to do.
What a Long Campaign Costs on Each Model
Price per million tokens is hard to feel. So here is one turn of a mid-campaign session, priced on each model.
The turn: the model receives your system prompt, world notes and chat history — 40,000 tokens in total — and writes a 500-token reply. This is the same turn we used to price the Claude models, so you can compare the two pages.
Every turn resends the whole history. DeepSeek charges much less for input it has seen before, which it calls a cache hit. In the “with cache hits” columns, 38,000 tokens are history the model has already seen and 2,000 are new.
| Model and time | One turn, no cache hits | One turn, with cache hits | 200 turns, with cache hits |
|---|---|---|---|
| V4.1 Flash, off-peak | $0.0063 | $0.0007 | $0.14 |
| V4.1 Flash, peak | $0.0126 | $0.0014 | $0.29 |
| V4 Pro, off-peak | $0.0274 | $0.0031 | $0.63 |
| V4 Pro, peak | $0.0548 | $0.0063 | $1.26 |
The numbers are our arithmetic on DeepSeek’s price list. They count the reply only. Thinking is extra text on top, billed like output. If the model reasons for 1,000 tokens before each reply, add about $0.24 to a 200-turn Flash session at peak hours — which nearly doubles the bill, and is still under a dollar.
Three things stand out.
The cheapest setup is about a ninth of the most expensive one. V4.1 Flash off-peak is $0.14 for 200 turns. V4 Pro at peak is $1.26. Same company, same context window.
Cache hits matter more than the model. Without them, 200 turns on V4.1 Flash at peak is about $2.50. With them, $0.29. Long pauses, or a frontend that reshuffles the top of your prompt on every turn, can cost you the cache hit.
Even the expensive option is cheap. For comparison, the same 200 turns cost about $3.50 on Claude Sonnet 5.5 with caching. V4 Pro at peak is a third of that. Nobody needs to choose a DeepSeek model to save money. Choose the one that plays better for you.
For subscriptions against per-token pricing across the whole category, see what an AI RPG actually costs.
Peak and Off-Peak: When DeepSeek Is Half Price
Since 16 August 2026, DeepSeek has had two price levels. Its price list says:
“Peak hours are 01:00 - 04:00 and 06:00 - 10:00 UTC, Monday through Friday, excluding Chinese public holidays. All other hours are off-peak, including weekends and Chinese public holidays in full.”
UTC is not how anyone plans an evening, so here are the same two blocks in local time. These use summer time, which is in force today; the blocks move one hour earlier on the clock when winter time starts.
| Where you are | First peak block | Second peak block |
|---|---|---|
| US Pacific | 6 pm – 9 pm, Sunday to Thursday | 11 pm – 3 am, Sunday night to Friday morning |
| US Eastern | 9 pm – midnight, Sunday to Thursday | 2 am – 6 am, Monday to Friday |
| UK | 2 am – 5 am, Monday to Friday | 7 am – 11 am, Monday to Friday |
| Central Europe | 3 am – 6 am, Monday to Friday | 8 am – noon, Monday to Friday |
The practical reading:
- In Europe, evening play is always off-peak. You pay half price without trying.
- In North America, weeknight evenings are peak. A 9 pm session on the East Coast pays full price. Friday and Saturday evenings are off-peak, because by then it is the weekend in UTC.
- Sunday evening in the US counts as Monday. It is already Monday in UTC, so it is peak.
On a 200-turn session this is a difference of cents. It only starts to matter if you play many hours a day or run long thinking on every turn.
The Model Name to Type in Janitor AI, SillyTavern and Other Frontends
“Best DeepSeek model for Janitor AI” is its own search, so here is the direct answer. The best model is the same everywhere — V4.1 Flash. A frontend does not change the model. It only changes how you reach it, and what you have to type.
If you connect straight to DeepSeek, the base URL is https://api.deepseek.com. The model names are:
| Name | What happens on DeepSeek’s API today |
|---|---|
deepseek-flash | V4.1 Flash. Use this. |
deepseek-v4-pro | V4 Pro |
deepseek-v4-flash | Still accepted. Answered by V4.1 Flash and billed at the Flash price |
deepseek-chat | Retired on 24 July 2026 |
deepseek-reasoner | Retired on 24 July 2026 |
If DeepSeek stopped working in your frontend over the summer and you never changed anything, the last two rows are the first thing to check. A setup that still sends deepseek-chat is asking for a model name that no longer exists.
If you go through a model router instead, the names are different. On OpenRouter, V4.1 Flash is deepseek/deepseek-v4.1-flash. Prices on a router depend on which company hosts the model, so they will not always match DeepSeek’s own list. Our OpenRouter roleplay guide covers how that works.
For the full Janitor setup — where the proxy settings are and what each field means — see how to use DeepSeek on Janitor AI, and use the model names from the table above. Janitor’s paid tier also sells models per token through its own Router; what that costs is in Janitor AI pricing. Which DeepSeek versions the Router offers is something to check inside it before you commit a campaign.
Older DeepSeek Models: V3, R1 and the Chimera Merges
People still search for DeepSeek V3 0324, R1 0528, V3.1 Terminus and V3.2, because presets and Reddit threads still name them. Here is where they stand.
DeepSeek’s own API no longer serves any of them. It serves V4.1 Flash and V4 Pro.
Other companies still host some of them. DeepSeek publishes its model weights openly, so other hosts can keep an old version running. On 1 October 2026, OpenRouter still listed V3 0324, R1 0528, V3.1, V3.1 Terminus and V3.2, along with the retired V4 Flash and both versions of V4 Pro.
| Older model | Context window on OpenRouter | Worth using? |
|---|---|---|
| DeepSeek V3 0324 | about 164K | Only if you know you prefer its writing |
| DeepSeek R1 0528 | about 164K | Only for the same reason; it always thinks first |
| DeepSeek V3.1 / V3.1 Terminus / V3.2 | about 164K | No clear reason over V4.1 Flash |
| DeepSeek V4 Flash 0731 | 1M | No — V4.1 Flash replaced it |
Some long-time players do prefer how V3 0324 writes, and that is a fair reason to stay. Know what you give up: a context window about one sixth the size, and a model nobody is improving.
The Chimera merges are gone from OpenRouter. “DeepSeek Chimera” (R1T and R1T2) were community-made blends of DeepSeek models, popular because they were listed for free. On 1 October 2026 OpenRouter’s model list has no Chimera entry at all.
Is DeepSeek Still Free?
There are three different things people mean by this.
The chat app is free. DeepSeek’s own app at chat.deepseek.com has two modes, Instant and Expert. It is a general chat assistant, not a roleplay tool. It works for a quick scene. For character cards, a lorebook and control over the prompt, you need a frontend and the API.
The API is paid, and very cheap. See the cost table above. A long evening of play is a few cents.
Free DeepSeek through OpenRouter is over, for now. This was the famous route in 2025. On 1 October 2026 OpenRouter listed 17 free models, and none of them was a DeepSeek model. A guide that promises free DeepSeek through a router was written for a list that has changed. Free models come and go, so check the list yourself before you follow any setup guide — and if a free route stops working inside your frontend, that is usually why.
If zero cost is the real requirement, our best free AI roleplay guide covers the options that are free by design.
Can You Run DeepSeek Yourself?
In principle, yes: DeepSeek publishes the weights for V4.1 Flash, V4 Flash and V4 Pro on Hugging Face under the MIT licence. In practice, no. DeepSeek describes V4.1 Flash as a 552-billion-parameter model, and its release note invites people “planning a large-scale deployment with 2,000 GPUs” to get in touch. That is a model for data centres.
The open weights still matter to you, indirectly. They are the reason other companies can host DeepSeek models, and the reason old versions stay available after DeepSeek retires them.
For models that do fit on a gaming PC, see local models for AI RPGs.
Our Recommendation
- Almost everyone: DeepSeek V4.1 Flash, model name
deepseek-flash. Newest, fastest by DeepSeek’s account, 1M context, and the cheapest model on the list. - Turn thinking off for fast scenes, and then set temperature to taste — DeepSeek suggests 1.3 to 1.5 for conversation and creative writing.
- Leave thinking on for rule-heavy campaigns, and stop adjusting temperature, because it does nothing there.
- V4 Pro only if you have compared the two and prefer its writing — and do not plan a long campaign around it, because DeepSeek has already tried to retire it once.
- Check your model name. If your setup still says
deepseek-chatordeepseek-reasoner, that is why it broke.
Whatever you pick, the model is only half of the result. A campaign lives or dies on its setup: clear instructions, a world file, and rules for memory. Our guide to why AI campaigns fall apart at turn 50 explains the problem, and the RPG prompts page gives you a setup to paste in.
Frequently Asked Questions
What is the best DeepSeek model for roleplay?
DeepSeek V4.1 Flash for almost everyone. It is DeepSeek’s newest model (released 10 September 2026), it has a 1M-token context window, and it is the cheapest model DeepSeek sells: $0.30 input and $1.20 output per million tokens at peak hours, and half of that off-peak. DeepSeek V4 Pro is still available and costs about four times as much. Pick it only if you have tried both and prefer how V4 Pro writes.
Should I use deepseek-chat or deepseek-reasoner for roleplay?
Neither. Both names were retired on 24 July 2026 and no longer work on DeepSeek’s API. The choice they stood for still exists, but it is now a setting called thinking mode on a single model. Use the model name deepseek-flash, and turn thinking off for fast scenes or leave it on for rule-heavy campaigns.
What model name do I type for DeepSeek in Janitor AI or SillyTavern?
On DeepSeek’s own API, use deepseek-flash for V4.1 Flash or deepseek-v4-pro for V4 Pro, with the base URL https://api.deepseek.com. The older name deepseek-v4-flash is still accepted and is answered by V4.1 Flash. On OpenRouter, V4.1 Flash is listed as deepseek/deepseek-v4.1-flash.
What is the best temperature for DeepSeek roleplay?
It depends on thinking mode. With thinking on, which is the default, DeepSeek ignores the temperature setting completely and does not return an error, so the slider does nothing. With thinking off, temperature works: DeepSeek’s own table suggests 1.3 for general conversation and 1.5 for creative writing.
Is DeepSeek V4 Pro better than V4.1 Flash for roleplay?
Not according to DeepSeek. Its release note for V4.1 Flash says tests by multiple parties put V4.1 Flash ahead of V4 Pro on performance, cost and speed, and it planned to switch V4 Pro off on 14 September 2026. It kept V4 Pro running after users asked for it. V4 Pro costs about 4.4 times as much for input and 3.3 times as much for output, so it only makes sense if you prefer its writing.
Is DeepSeek free for roleplay?
The DeepSeek chat app at chat.deepseek.com is free. The API is paid per token, but cheap: a 200-turn session on V4.1 Flash costs well under one dollar. On 1 October 2026, OpenRouter listed 17 free models and none of them was a DeepSeek model, so guides that promise free DeepSeek through OpenRouter are out of date.
When is DeepSeek cheapest to use?
Outside peak hours. DeepSeek charges full price from 01:00 to 04:00 and from 06:00 to 10:00 UTC, Monday to Friday, and half price at all other times, including the whole weekend. For players in the eastern United States, the first peak block is 9 pm to midnight on Sunday to Thursday evenings.
Can I run DeepSeek V4.1 Flash on my own computer?
Not in practice. DeepSeek published the weights on Hugging Face under the MIT licence, but it describes V4.1 Flash as a 552-billion-parameter model. That is a data-centre model, not a home one. For models that do fit on a gaming PC, see our local models guide.
Arcanum is independent and not affiliated with DeepSeek. DeepSeek is a trademark of its owner, used here only to identify its models.