DeepSeek V4.1 Flash

deepseek/deepseek-v4.1-flash

DeepSeek V4.1 Flash adds native image understanding to the Flash line. Its Causal Encoder-Decoder architecture separates input processing from output generation, with a design aimed at input-heavy coding and computer-use workflows.

Input · Account credit
$0.20

per 1M tokens

Cash equivalent $0.02

Output · Account credit
$1.00

per 1M tokens

Cash equivalent $0.10

Context window
1,048,576

tokens · OpenRouter

Input → Output
Text · Image→ Text
Model specifications
Sources reviewed: Y-API catalog snapshot:

Choosing this model

Selection advice by Y-API. The checks below are suggested evaluations, not published test results.

Where to start

Evaluate it for tasks that connect a screenshot to application code: locating a layout problem, describing a chart before checking its underlying data, or combining visual feedback with a failing test.

What to watch for

Native vision in a model card does not establish that Y-API forwards your image format correctly. Start with a known image and verify its contents; a plausible response or HTTP 200 is insufficient evidence.

Model specifications

These are OpenRouter model-level specifications, not a Y-API compatibility test. A particular route may accept fewer input formats, parameters or tokens. Verify the features you need with a small request; a successful text response does not validate vision or tool calling.

Context window
1,048,576 tokens
Input
Text · Image
Output
Text
Listed on OpenRouter
Parameters listed by OpenRouter
frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p
OpenRouter model page & specifications

Estimate your cost

Estimated credit consumed
$0.70
Estimated cash equivalent
$0.07

Illustrative token budget, not measured usage or a quote. Includes input and output; excludes separate media charges, cache discounts and retries. Include billed reasoning tokens in your output budget where applicable. Actual billing follows usage returned by the service.

$1 paid adds $10 of credit. Cash equivalent = credit consumed ÷ 10; this is not the model publisher’s list price.

Same token budget, different models
ModelEstimated credit consumedEstimated cash equivalent
DeepSeek V4.1 Flash$0.70$0.07
DeepSeek V4 Flash 0731$0.30$0.03
Qwen3.8 Flash$0.45$0.045

Use the API

These minimal, text-only requests use the exact Y-API model ID. They do not demonstrate image, audio, video, file or tool support. The output limit also needs room for reasoning; an empty answer with finish_reason=length can mean the budget was exhausted.

A task to try

A button is visible at 1440px but clipped at 375px. List three CSS causes and a browser check that can distinguish each one.

Set the TOKEN environment variable to a key from your console. Run this on your server or locally; never expose a key in browser code or a public repository.

cURL · DeepSeek V4.1 Flash
curl --fail-with-body --silent --show-error --max-time 120 \
  'https://api.y-api.bestvirtualgoods.com/v1/chat/completions' \
  -H "Authorization: Bearer ${TOKEN:?Set TOKEN first}" \
  -H 'Content-Type: application/json' \
  --data-binary @- <<'JSON'
{
  "model": "deepseek/deepseek-v4.1-flash",
  "messages": [
    {
      "role": "user",
      "content": "A button is visible at 1440px but clipped at 375px. List three CSS causes and a browser check that can distinguish each one."
    }
  ],
  "max_tokens": 4096
}
JSON

How to evaluate the result

Look for distinguishable checks for fixed widths, overflow and positioning. Then run a separate controlled image test before adding screenshot-based automation.

Before you choose

Can I reuse the V4 Flash integration unchanged?

The text request shape is the same, but the ID, pricing and model behavior differ. Adding images introduces another compatibility boundary; test the media representation and task result separately.

Sources & scope

Technical facts come from the cited model page and, where available, its linked publisher card. A card describes that checkpoint; it is not proof of the weights a gateway serves. Prices come only from the Y-API catalog. We do not claim measured latency, uptime or benchmark scores for this endpoint.