DeepSeek

DeepSeek V4.1 Flash

Name: DeepSeek V4.1 Flash
Brand: DeepSeek
Price: 0.1323 USD
Availability: InStock

#3 on Kyma

DeepSeek V4.1 Flash is the lab's current general model: a 1M-token context window, native image input and a thinking mode, at the Flash price band. DeepSeek positions it ahead of V4 Pro and routes V4 Pro requests onto it from 2026-09-14, so it is the DeepSeek id to pick for new work.

Modalities

Text+Image → Text

Below release

Not established

Weights

Published

deepseek-ai/DeepSeek-V4.1-Flash-1017

Where it sits in the catalogue Kyma measures

Every number against every text model Kyma prices per token — a stated rule, not a chosen line-up.

Price · input#8/84

$0.1323

output $0.3969

median $1.013 · best $0.0435

Price · output#7/83

$0.3969

per 1M tokens generated

median $3.528 · best $0.1886

Availability · 30d#35/54

99.97%

3,214 observations since 2026-09-12

median 100.0% · best 100.0%

Throughput#17/25

41 tok/s

probe median, one fixed prompt

median 46.1 tok/s · best 160.1 tok/s

Response time#9/25

1.11 s

probe median, to a complete answer

median 1.33 s · best 0.46 s

Context

1.05M

max output 131,072

published by DeepSeek, not measured here

Tick above each rail is this model, below it the other 83. Dashed rule is the field median, solid is its best. Better is left; the axis stops at the 90th percentile, so a few models sit past its right edge.

Usage

How much this model is actually called here.

Rank

of 113 active models

Tokens served

457.9M

all-time

Platform share

9.7%

of all tokens

Tokens · last 15 daysOct 15 → Oct 29

How it behaves under real clients

The same model answering different prompt shapes — measured, not benchmarked.

Client	Requests	Tokens	Throughput	To first token	p95 total	Completed
Node.js App	2,111	182.3M	54 tok/s	1.37 s	27 s	99.6%
OpenClaw	1,214	17.2M	59 tok/s	0.68 s	3.63 s	100%
Python App	764	11.0M	55 tok/s	4.92 s	19 s	100%
Cline	686	35.3M	27 tok/s	3.50 s	17 s	100%
Java/Kotlin App	277	30.2M	52 tok/s	2.50 s	21 s	100%

Grouped by the client that sent the request. Not a benchmark: the same model on different prompt shapes. Throughput and time-to-first-token are medians; p95 is the slowest response in twenty. 5 clients under 100 requests not shown.

Two clocks, and why they disagree

Kyma measures this model twice. Both are real; they answer different questions.

Probe · every 6h · 30 days

1.11s to answer

One fixed prompt, on a schedule, to every model. Comparable, because the model is the only thing that changes.

Observations: 3,214
Answered by a substitute: 0

Real traffic · last 7 days

4.81s to answer

Your requests, at the lengths clients actually send. Not comparable between models, but it is what running this one feels like.

Requests: 1,257
Completed: 100%
p95: 51.7 s

The gap is prompt length, not the model degrading. Use the probe figure to choose between models, the traffic figure to budget for your own.

Pricing

Pay per token. Cached input bills at this model’s own cached rate, listed below.

$0.1323$0.27 /1M input$0.3969$0.81 /1M output

51% off· ends Nov 4Returns to $0.27 /1M input and $0.81 /1M output on Nov 4.

Hobby10 req/day · 2K in / 500 out

~$0.14/mo

Production1,000 req/day · 2K in / 500 out

~$13.89/mo

Scale20,000 req/day · 2K in / 500 out

~$278/mo

+ Estimate your workload

Requests / day1,000

Input tokens / request2,000

Output tokens / request500

Estimated monthly cost

$13.89

$0.4630 / day on DeepSeek V4.1 Flash

Same workload on:

DeepSeek V4 Flash Vision$40.87+194%

DeepSeek V4 Flash$11.07-20%

Estimates use list pricing. Actual bills depend on real token counts, and every response includes its exact cost.

When to use DeepSeek V4.1 Flash

Updated 2026-09-12

Where this model earns its cost — and where it doesn't.

DeepSeek released V4.1 Flash on 2026-09-10 as the successor to both V4 Flash and V4 Pro. Its card lists a 1M context window, thinking and non-thinking modes, JSON output, tool calls and image input. The lab's own note says its results land ahead of V4 Pro and that its KV cache needs a quarter of the memory of the previous generation.

On Kyma it is served through the OpenAI-compatible endpoint with automatic failover across three routes and exact cost reporting in the usage.cost field. Prompt caching is not exposed on the primary route, so every input token bills at the input rate.

The weights are published under the MIT license. The output cap on Kyma is 131,072 tokens per request.

Coding

Tool calling and structured outputs with a 1M-token window put whole repositories in one request.

Vision at value pricing

Image input on a Flash-priced model — screenshots, diagrams and documents without moving to a flagship.

Long-context analysis

The 1M-token window takes document collections or long agent transcripts in a single call.

High-volume pipelines

Flash-band pricing suits background jobs and batch processing that run thousands of times a day.

Not ideal for: Prompt-cache-heavy workloads — the primary route publishes no cached-input rate, so repeated prefixes bill in full.

How it compares

Against the peers people actually weigh it against.

Spec	DeepSeek V4.1 Flash	DeepSeek V4 Flash Vision	DeepSeek V4 Flash
Input /1M	$0.1323	$0.3892	$0.123
Output /1M	$0.3969	$1.168	$0.2458
Context	1M	1M	1M
Tools	Yes	Yes	Yes
Reasoning	Yes	Yes	Yes
Throughput	41 tok/s		20 tok/s

Quick start

Up and running in under two minutes.

1
Create an API key
Sign up and grab a key from the dashboard — $0.50 free credit on the free tier, which covers DeepSeek V4.1 Flash. No card required.
Get API key →

Make your first request

Drop in your key and send a chat completion — fully OpenAI-compatible.

curl https://kymaapi.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v4.1-flash",
    "messages": [
      {"role": "user", "content": "Explain prompt caching in one paragraph."}
    ]
  }'

Stream responses

Add "stream": true to receive tokens as they arrive.

curl https://kymaapi.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v4.1-flash",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

FAQ

Common questions about this model.

What is the context window of DeepSeek V4.1 Flash?

DeepSeek V4.1 Flash has a 1M-token context window — roughly 1542 pages of text in a single request.

How much does the DeepSeek V4.1 Flash API cost?

$0.1323 per 1M input tokens and $0.3969 per 1M output tokens (on offer until Nov 4, then $0.27/$0.81). No subscription; you pay only for what you use.

Does DeepSeek V4.1 Flash support function calling?

Yes — DeepSeek V4.1 Flash supports tool/function calling and structured outputs (JSON mode), so it works with agent frameworks out of the box.

Are the weights for DeepSeek V4.1 Flash publicly available?

Yes. DeepSeek publishes DeepSeek V4.1 Flash's weights as deepseek-ai/DeepSeek-V4.1-Flash-1017, so you can download and run the model yourself (https://huggingface.co/deepseek-ai/DeepSeek-V4.1-Flash-1017, read 2026-10-25). Kyma serves it because it is convenient and has failover behind it, not because it is the only way to reach it.

Is DeepSeek V4.1 Flash ever served below the precision its creator released it at?

Kyma cannot say. Answering it needs the precision DeepSeek released DeepSeek V4.1 Flash in, and we could not source that from DeepSeek's own material — so there is nothing to compare a route against. We publish "not established" rather than reading a low format as a downgrade: on several models in this catalogue a low format is exactly how the creator ships it.

How do I use DeepSeek V4.1 Flash?

Kyma is OpenAI-compatible: point your SDK's base URL at https://kymaapi.com/v1, use your Kyma API key, and set the model to deepseek-v4.1-flash. Signing up is free and includes $0.50 of credit on the free tier, which covers this model — no card required.

How is DeepSeek V4.1 Flash different from V4 Flash?

It is a newer checkpoint (2026-09-10) with native image input and a thinking mode, and DeepSeek says its results land ahead of V4 Pro. V4 Flash stays on Kyma as the cheaper previous checkpoint.

Does it support images?

Yes — image input is native. Send images the same way as any other vision model on the OpenAI-compatible endpoint.

Why use DeepSeek V4.1 Flash through Kyma?

One API key and one OpenAI-compatible endpoint cover this and every other model on the platform, with automatic failover across its three routes and the exact cost of every request in usage.cost.

Start with $0.50 free credit on the free tier — no card required.Create account →

More models by DeepSeek

Model	Context	Input	Output
DeepSeek V4 Flash Vision	1M	$0.3892	$1.168
DeepSeek V4 Flash	1M	$0.123	$0.2458
DeepSeek V3	160K	$0.518	$0.7571
DeepSeek R1	64K	$0.7425	$2.957