DeepSeek V4 Pro
DeepSeek's flagship reasoning model, included in NeverNo's paid plans: it thinks before every answer, takes in 200,000 tokens of context and seldom refuses.
Updated November 8, 2026
Readable on your devices only.
Your conversation is readable on your device, and on your other devices if you sync them. Nowhere else.
Unreadable to us.
Your message passes through without being written down; your chats are only ever stored encrypted.
The model doesn’t know you.
It gets the question, never your email, your account or your IP address.
Nothing is left along the way.
The reply comes back and is stored here, encrypted; even when you sync, your key never reaches us in the clear.
At a glance
| Maker | DeepSeek |
|---|---|
| Context | 200,000 tokens |
| Longest reply | 16,384 tokens |
| Strengths in the app | Reasoning, Code |
| Reasoning | Built in, always on |
| Who can use it | Paid plans |
| How it’s paid | Included in the plan’s daily allowance, then credits |
| Privacy | Private: an open model run by NeverNo on providers chosen because they don’t keep requests. Your history stays encrypted in your browser. |
Price
What the app charges, read from the same table the servers bill with. 1 credit = $0.01.
| Typical message (2,000 tokens read, 600 written) | 1.1 credits ($0.011) |
|---|---|
| Million tokens read | 342.88 credits ($3.43) |
| Million tokens written | 685.75 credits ($6.86) |
Included in the plan’s daily allowance first; these prices apply beyond it.
Measured
Our own measurements and one third-party score, each with its conditions and date. Figures are not rounded.
| Median time to the first word | 1.2 sOur client, 12 conversations of 3 turns, November 4, 2026 |
|---|---|
| Refused turns on our private test of sensitive requests | 2.8 %Same 12 conversations, November 4, 2026 |
| Legitimate programming requests that cautious models often refuse | 1 refused of 12, score 4.2/10Each model alone, scored blind by a judge of another family, November 7, 2026 |
| arena.ai Text Arena, overall score | 1,465Third-party leaderboard, page dated October 27, 2026 |
What it is
DeepSeek V4 Pro is the larger sibling of DeepSeek V4 Flash. Where Flash answers at once, Pro works through the problem first, on every message: its reasoning is built in and cannot be switched off, so there is no setting to fiddle with in the model picker. That makes it a natural choice for questions where a wrong first instinct is costly, such as a subtle bug, a proof, a data migration or a contract you need read carefully.
It is included in every paid plan, inside the daily message allowance, with no per-message credits. Like our other open models it runs privately: NeverNo routes requests to providers selected because they do not retain them, nothing ties the request to your name, and your conversation history lives encrypted in your own browser.
The numbers we measured ourselves are encouraging. On November 4, 2026, across 12 three-turn conversations from our client, its median time to the first word was 1.2 seconds, and it refused 2.8% of turns on our private test of sensitive requests. On November 7, 2026, asked 12 legitimate programming requests that cautious models often refuse, it declined only 1 and received a blind score of 4.2 out of 10 from a judge belonging to another model family. Its arena.ai Text Arena overall score was 1465 on the page dated October 27, 2026.
Its context holds 200,000 tokens and a single reply can run to 16,384 tokens, the longest output among the open models we include in plans without credits. Enough to return a whole refactored file, a long technical report or a detailed plan in one go. When you need the complete deliverable rather than an outline with “the rest is similar”, that headroom is what sets it apart from its neighbors.
Strengths
Reasoning on every answer: it checks its own steps before replying, which pays off on logic, mathematics, debugging and anything with several moving parts.
Very long replies: up to 16,384 tokens in a single answer, twice what DeepSeek V4 Flash or GLM 5.2 can write at once.
Large memory for a conversation: 200,000 tokens of context let you paste several source files, a long specification or a whole chapter and keep discussing it.
Few refusals measured: 2.8% of sensitive turns in our November 4 test, and only 1 of 12 legitimate programming requests declined on November 7.
Private and included: no credits to watch, an open model run on providers chosen for not keeping requests, history encrypted on your device.
Limits
Reasoning cannot be turned off. For a quick rephrasing or a one-line answer, DeepSeek V4 Flash is lighter and free.
It does not read images. For screenshots, diagrams or photos, Kimi K3 brings vision on paid plans, as do the free GLM 5.3 Flash and Mistral Small 3.2.
On our coding test GLM 5.2 did better, refusing none of the 12 requests and scoring 5.8 versus 4.2, and its third-party score was also higher, at 1475 on the same arena.ai page. For hard programming work, try both.
It is not on the Free plan. Free accounts and guests can use DeepSeek V4 Flash, which comes from the same family.
When to choose it
Cracking a stubborn bug
Paste the failing module, the test output and the logs. It reasons through the paths before proposing a fix, and the 16,384-token ceiling leaves room for the corrected file rather than a fragment of it.
Math, logic and structured analysis
Step-by-step solutions, checking a derivation, estimating a business case, auditing a spreadsheet formula, weighing the trade-offs of an architecture or a database schema: tasks where showing the work matters as much as the result.
Reading long documents closely
A lease, a technical standard, a set of meeting notes or a research paper fits in its 200,000-token context. Ask for obligations, contradictions, risks or open questions, with quotes from the source to back each point.
Prompt tips
State the goal and the constraints up front, then let it think. Because reasoning is automatic, you do not need to write “think step by step”; spend those words on details of the problem instead.
Ask it to check its own answer against your requirements at the end, for example “list any requirement you did not meet”. It has the room in its reply to do so.
For a long deliverable, describe the expected structure (sections, file names, test cases) so the 16,384 tokens go to content rather than to guessing the shape.
Frequently asked questions
Is DeepSeek V4 Pro free on NeverNo?
It is included in every paid plan, within the daily message allowance and without credits. It is not available on the Free plan, where DeepSeek V4 Flash is the closest option.
Is DeepSeek V4 Pro private on NeverNo?
Yes, it is one of our private models: an open model that NeverNo runs on providers chosen because they do not keep requests, with no name attached. Your chat history stays encrypted in your browser.
What is the context window of DeepSeek V4 Pro?
200,000 tokens on NeverNo, with replies of up to 16,384 tokens.
DeepSeek V4 Pro or GLM 5.2 for coding?
On our November 7, 2026 test of 12 legitimate programming requests, GLM 5.2 refused none and scored 5.8 out of 10; DeepSeek V4 Pro refused 1 and scored 4.2. Pro started faster in our November 4 test (1.2 seconds versus 2.9) and writes longer replies, so for very large outputs it remains useful.
Can I turn off reasoning on DeepSeek V4 Pro?
No. The model reasons on its own on every message and its providers offer no way to steer that, so the picker shows no reasoning setting for it. Use DeepSeek V4 Flash when you want an immediate answer.