DeepSeek V4 Flash
DeepSeek's quick model, free on NeverNo: it starts answering fast, rarely refuses, and handles everyday code as well as everyday questions.
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 | 128,000 tokens |
| Longest reply | 8,192 tokens |
| Strengths in the app | Fast, Code |
| Reasoning | On demand |
| Who can use it | Everyone, Free plan included |
| 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) | 0.08 credits ($0.0008) |
|---|---|
| Million tokens read | 24.01 credits ($0.24) |
| Million tokens written | 48.01 credits ($0.48) |
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 | 1.22 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 | 2 refused of 12, score 4.1/10Each model alone, scored blind by a judge of another family, November 7, 2026 |
| arena.ai Text Arena, overall score | 1,436Third-party leaderboard, page dated October 27, 2026 |
What it is
DeepSeek V4 Flash is the lighter member of DeepSeek's V4 family, and on NeverNo it is one of the models included in the Free plan. It is the one to reach for when you want a useful answer now: a function written, an error message explained, an email tightened, a concept untangled, without waiting for a heavyweight model to think.
Our own measurements back that up. On November 4, 2026, across 12 conversations of 3 turns run from our client, its median time to the first word was 1.22 seconds, and it refused 2.8% of turns on our private test of sensitive requests. On November 7, 2026, given 12 legitimate programming requests that cautious models often turn down, it refused 2 and earned a blind score of 4.1 out of 10 from a judge of another model family. On the arena.ai Text Arena, its overall score was 1436 on the page dated October 27, 2026.
It runs as a private model: NeverNo sends requests to providers chosen because they do not keep them, and the conversation itself stays encrypted in your browser. The context window holds 128,000 tokens and a single reply can reach 8,192 tokens, enough for a full module or a long explanation.
Reasoning is optional. By default it answers right away; you can also force it off, and on paid plans you can switch it to its own deeper reasoning when a question needs more care. If you find yourself turning that on all the time, DeepSeek V4 Pro is probably the better choice.
Strengths
Fast to start: a median of 1.22 seconds to the first word in our November 4, 2026 test, which keeps a back-and-forth conversation fluid.
Rarely says no: 2.8% of turns refused on our private test of sensitive requests, the same rate we measured for DeepSeek V4 Pro.
Comfortable with code: listed for code in our catalog, it accepted 10 of 12 legitimate programming requests that cautious models often refuse.
Included in the Free plan, with a 128,000-token context, so you can paste a long file or a long thread and still ask questions about it.
Room for long answers: up to 8,192 tokens per reply, double what Mistral Small 3.2 or NeverNo Uncensored allow, so a complete script or a detailed walkthrough is rarely cut off mid-sentence.
Limits
It cannot read images. To ask about a screenshot, a chart or a photo, use GLM 5.3 Flash or Mistral Small 3.2, both free and both with vision.
On hard problems its depth shows. DeepSeek V4 Pro scored 4.2 to its 4.1 on our coding test and reasons natively on every answer, with a 200,000-token context for bigger projects.
The deeper reasoning setting comes with paid plans; on the Free plan you choose between the default and reasoning off.
Its third-party score, 1436 on the arena.ai Text Arena page dated October 27, 2026, sits below the 1477 of GLM 5.3 Flash on that same page. When polished prose or nuanced judgment matters more than quick technical help, compare it with that free neighbor.
When to choose it
Quick coding help
Write a script, translate a function from Python to TypeScript, explain a stack trace, draft unit tests or suggest a regular expression. The fast start makes it pleasant for a long series of small questions, the way you would lean over to a colleague's desk.
Everyday questions, answered plainly
Definitions, comparisons, the gist of a pasted article, a second opinion on a budget or a travel plan, a polite reply to a difficult message: the kind of request where a direct, quick answer beats a long deliberation.
Security and systems questions
Port scanning your own network, reading a suspicious script, hardening a server configuration: with few refusals measured, it tends to engage with legitimate technical work that more cautious assistants sidestep. Treat it as a sparring partner rather than an auditor, and only probe machines you own or are authorized to examine.
Prompt tips
Paste the exact error and the code around it rather than describing the problem. With 128,000 tokens of context, giving it the real file costs you nothing.
Say which language, version and libraries you use. A line such as “Node 24, TypeScript, no external packages” saves a round of corrections.
When an answer comes back too shallow, ask it to think step by step or, on a paid plan, switch reasoning on for that message before reaching for a bigger model.
Frequently asked questions
Is DeepSeek V4 Flash free on NeverNo?
Yes. It is included in the Free plan within the daily message allowance, and guests can try it without an account. Paid plans raise the allowance and add the deeper reasoning setting.
Is DeepSeek V4 Flash private on NeverNo?
NeverNo runs it as a private model on providers chosen because they do not keep requests, without your name attached. Your chat history is stored encrypted in your browser, not on our servers.
What is the context size of DeepSeek V4 Flash?
128,000 tokens of context on NeverNo, with replies of up to 8,192 tokens each.
DeepSeek V4 Flash or DeepSeek V4 Pro?
Flash is free and starts fast; Pro, on paid plans, always reasons, has a 200,000-token context and allows replies twice as long. In our tests both refused 2.8% of sensitive turns; Pro refused 1 coding request out of 12 versus 2 for Flash.
How do I use DeepSeek V4 Flash on NeverNo?
Open a chat, pick DeepSeek V4 Flash in the model selector and type your message. No setup is needed, and you can start as a guest, without an account.