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Text modelsDeepSeekAvailable in Neiron

DeepSeek V4.1 Flash — analysis and code

DeepSeek V4.1 Flash helps explain complex topics, review code, and compare options. Select it and continue on the web or in Telegram. Saved Flash chats work as before; V4 Pro remains a separate choice.

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Ready-to-use prompts for DeepSeek V4.1 Flash

Select this model in the bot or on the website. Prepare the listed material, copy a prompt and paste it into the selected model. Replace example details with your own and review the output using the checks below.

These are examples to try, not test results. Copying does not submit a task; check access and allowances in your account.

Check a simple calculation

Before you start

All numbers are in the example. Replace them for your task while keeping the units explicit.

Prompt

Check this calculation: 18 boxes of 12 bottles each; 47 bottles were sold. How many full boxes and loose bottles remain? Show the starting count, subtraction and a reverse-addition check. Do not round the remainder to a full box.

Review the output

Check the starting 216 bottles and remaining 169: 14 full boxes and one loose bottle.

What to change in the next attempt

If the remainder was rounded, request a whole-box count and a separate remainder.

Separate possible causes from checks

Before you start

Describe the observed problem without passwords or personal data.

Prompt

After a form change, some users cannot submit it. We have no logs or exact error. Give three possible causes, one safe check for each, and the data to collect. Do not present any cause as established.

Review the output

Check that hypotheses are not presented as a diagnosis and that checks do not require deleting data or disabling protection.

What to change in the next attempt

When an exact error appears, add it and request revised hypotheses rather than the previous list again.

Compare settings and alternatives

Capabilities

Separate a problem into inputs, constraints, and questions.

Explain the logic of a code fragment.

Suggest checks for a suspected error.

Best for

SQL query explanationProblem-statement reviewError-message analysis

Reviewed facts

Developer
DeepSeek
Purpose
Language model, Reasoning, Coding
Input
Text
Output
Text
Developer geography
China
Verified
2026-09-16

Benchmarks

No comparable benchmark is recorded in this card.

Sources

How to launch

  1. 1

    Open Neiron chat and choose the model in the selector.

  2. 2

    Describe the task and add context or a file when needed.

  3. 3

    Compare the answer with an alternative model for important work.

Settings

Check facts against sources and code changes with tests. DeepSeek web search is not enabled in Neiron.
DeepSeek reports native vision for V4.1 Flash. Neiron photo analysis still uses a separate route; direct vision mode for this version is not enabled here.

News examples

Photo 1 of 6Photo 2 of 6Photo 3 of 6Photo 4 of 6+2 more

Compare with

Open full comparisonGPT-5.6 LunaGrok 4.6

Update history

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Employee Fired After Uploading Work Documents to DeepSeek

In Moscow, the sales director of an engineering company was fired for disclosing trade secrets. According to the employer, she forwarded official documents to her personal email and uploaded some confidential files to DeepSeek. The court sided with the company and refused to reinstate the employee…

DeepSeek suddenly stops opening for some users in Russia

DeepSeek suddenly stops opening for some users in Russia

Social media is flooded with complaints about access issues with DeepSeek. Users report that the service has stopped loading or is intermittently working. ❗️At the same time, Roskomnadzor has already stated that no restrictions have been imposed on DeepSeek in Russia. In Neiron, DeepSeek continues…

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FAQ

When should I choose V4.1 Flash?

Use it for explanations, editing, code review, and structured analysis. Include source material, constraints, and your preferred answer format.

Do I need a new chat or pay to switch?

No. Saved Flash chats work as before. Selecting a model does not use quota; submitted requests use your plan’s normal text quota.

What happened to V4 Pro?

DeepSeek canceled the planned September 14, 2026 API retirement of V4 Pro and kept its billing unchanged. Pro remains a separate model in Neiron; saved Pro selections are not switched to Flash.