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DeepSeek V4.1 Flash API with native vision, 1M context, 384K max output, and PoYo pricing at $0.30 input / $1.20 output per 1M tokens.
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Configuration
1.0
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Pricing details

Transparent pricing with no hidden fees. Pay as you go.

DeepSeekdeepseek-flash
Cache hit
PoYo price
$0.006/1M tokens
1.2 credits
Official price
$0.006/1M tokens
Official
You save
-
DeepSeekdeepseek-flash
Input tokens
PoYo price
$0.300/1M tokens
60 credits
Official price
$0.300/1M tokens
Official
You save
-
DeepSeekdeepseek-flash
Output tokens
PoYo price
$1.20/1M tokens
240 credits
Official price
$1.20/1M tokens
Official
You save
-

* Actual fees are based on the final output.

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Available on PoYo

Complete guide to using Affordable DeepSeek V4.1 Flash API

Affordable DeepSeek V4.1 Flash API

Access DeepSeek V4.1 Flash API instantly on PoYo—no waitlist required. Native vision, 1M-token context, 384K max output, and a 552B MoE profile with 8B/16B active parameters. Pay $0.30 input and $1.20 output per 1M tokens.
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Available DeepSeek V4.1 Flash API Models on PoYo

01

DeepSeek V4.1 Flash

Use model ID deepseek-flash on PoYo. DeepSeek's official API name is deepseek-flash. Legacy deepseek-v4-flash requests now route to V4.1 Flash.
View Documentation

Key Features of DeepSeek V4.1 Flash API

The smallest model in DeepSeek's new architecture family: native vision, compressed KV cache, and agent scores that beat V4 Pro on many coding and automation benches.

01

Native vision for screenshots, charts, and docs

V4.1 Flash understands JPEG, PNG, GIF, and WebP alongside text. That closes the gap teams hit when an agent needs to read a UI, a chart, or a scanned page without a separate vision model.

  • Text plus image input, text output
  • Useful for UI review and document screenshots
  • Image tokens count toward usage
DeepSeek V4.1 Flash native vision for screenshots and documents

02

Agent scores that beat DeepSeek V4 Pro

DeepSeek's launch table reports V4.1 Flash at 74.2 on DeepSWE v1.1 and 90.6 on Terminal-Bench 2.1, ahead of V4 Pro. GPQA and text-only HLE still favor Pro, so keep a Pro baseline until 04:00 UTC on September 14, 2026.

  • DeepSWE v1.1: 74.2 resolved
  • Terminal-Bench 2.1: 90.6 Pass@1
  • Pro still leads GPQA Diamond 92.4 vs 90.9
DeepSeek V4.1 Flash agent benchmark scores vs V4 Pro

03

1M context with a much smaller KV cache

Causal Encoder–Decoder activates about 8B parameters on input and 16B on output. DeepSeek reports 890 bytes of global KV cache per token—about one quarter of V4 Flash—so long agent histories stay cheaper to serve.

  • 1M-token context window
  • Maximum output 384K tokens
  • KV cache about 1/4 of V4 Flash
DeepSeek V4.1 Flash 1M context and compressed KV cache

04

Thinking, tools, and cache-friendly pricing

Thinking is on by default, with controllable reasoning effort. Tool calls, JSON output, and Anthropic-compatible requests are documented. Cache hits are the cheapest line item for repeated agent prefixes.

  • Thinking and non-thinking modes
  • Tool calling and structured output
  • Cached input $0.006 / 1M tokens on PoYo
DeepSeek V4.1 Flash thinking, tools, and cache pricing

Who Can Benefit from DeepSeek V4.1 Flash API?

01

Agentic software engineering

Run terminal, repository, and verification loops where V4.1 Flash's DeepSWE and Terminal-Bench scores matter more than a larger Pro checkpoint.

02

High-volume chat assistants

Serve support, Q&A, and product chat at Flash token rates with a 1M context for long customer threads.

03

Vision-in-the-loop agents

Pass screenshots, charts, and document images with the same model that writes code and tool calls.

04

Long-document analysis

Keep large reports, repos, and knowledge packs in one request instead of aggressive chunking.

05

Tool-using production agents

Call functions, return JSON, and keep multi-turn tool traces without switching model families.

06

Teams leaving V4 Pro

From 04:00 UTC on September 14, 2026, DeepSeek routes deepseek-v4-pro to V4.1 Flash. Evaluate the cheaper Flash route on PoYo before that cutoff.

DeepSeek V4.1 Flash API vs V4 Pro, V4 Flash, Kimi K3 — Model Comparison

Official DeepSeek launch numbers at max reasoning effort. PoYo prices match official DeepSeek peak rates.

FeatureDeepSeek V4.1 FlashDeepSeek V4 ProDeepSeek V4 FlashKimi K3
PoYo model IDdeepseek-flashdeepseek-v4-prodeepseek-v4-flashkimi-k3
Backbone / active params552B / 8B in, 16B out1.6T / 49B284B / 13B2.8T MoE
VisionNative image understandingText-focused Pro checkpointRetired; routes to V4.1Native image and video
Context / max output1M / 384K1M1M1M
DeepSWE v1.174.262.754.467.5
Terminal-Bench 2.190.687.982.788.3
GPQA Diamond90.992.489.992.9
PoYo input / output$0.30 / $1.20 per 1M$0.348 / $0.696 per 1M$0.112 / $0.224 per 1M$2.28 / $11.40 per 1M

Benchmarks from DeepSeek's V4.1 Flash model card and technical report, September 10, 2026. PoYo token prices match official DeepSeek peak rates. V4 Flash and V4 Pro IDs remain listed during the official routing window.

How to Use DeepSeek V4.1 Flash API on PoYo

Step 1: Register & Create API Key
Sign in to PoYo and create a key.
Create API Key →

Step 2: Top Up Credits
Add credits before you send production traffic.
Add Credits →

Step 3: Integrate the API
Send deepseek-flash to POST https://api.poyo.ai/v1/chat/completions.
View Documentation →

DeepSeek V4.1 Flash API Pricing: Simple and Affordable

DeepSeek V4.1 Flash: $0.30 input / $1.20 output per 1M tokens on PoYo (60 / 240 credits). Cached input is $0.006 per 1M tokens (1.2 credits).

✓ Native vision, 1M context, 384K max output
✓ Matches official DeepSeek peak rates
✓ No subscription fees — pay only for what you use.

Frequently Asked Questions about DeepSeek V4.1 Flash API

What model ID should I use for DeepSeek V4.1 Flash?

On PoYo use deepseek-flash. DeepSeek's official API name is deepseek-flash. Legacy deepseek-v4-flash and deepseek-v4-flash-vision-exp currently route to V4.1 Flash.

How much does DeepSeek V4.1 Flash API cost? Is it free?

It is not a free API. PoYo is pay-as-you-go: $0.30 (60 credits) per 1M input tokens, $0.006 (1.2 credits) per 1M cached input tokens, and $1.20 (240 credits) per 1M output tokens, matching official DeepSeek peak rates. There is no subscription.

What are the parameters of DeepSeek V4.1 Flash?

DeepSeek describes a 552B MoE profile with about 8B active parameters on input and 16B on output, a 1M-token context window, and 384K max output. A smaller KV cache versus V4 Flash is a launch talking point.

What is DeepSeek V4.1 Flash good for?

It is built for high-volume chat, agent loops, coding and terminal tasks, and vision-in-the-loop work such as screenshots, charts, and documents. DeepSeek reports strong DeepSWE and Terminal-Bench scores relative to V4 Pro.

Is DeepSeek V4.1 Flash better than V4 Pro?

DeepSeek reports V4.1 Flash ahead on many agent benches, including DeepSWE 74.2 vs 62.7 and Terminal-Bench 2.1 90.6 vs 87.9. V4 Pro still leads GPQA Diamond (92.4 vs 90.9) and the comparable HLE text-only subset. Test your own tasks before September 14, 2026.

Should I switch from DeepSeek V4 Flash to V4.1 Flash?

Yes for most new API traffic. V4.1 Flash is a new architecture with native vision, stronger agent benches, and a smaller KV cache. Legacy deepseek-v4-flash already routes to V4.1 Flash. Stay on an older self-hosted V4 Flash checkpoint only if you depend on published 0731 weights, GGUF/Hugging Face builds, or prompts tuned to that behavior.

Is DeepSeek V4.1 Flash good for coding?

DeepSeek positions it for coding and terminal agents. Launch numbers put DeepSWE v1.1 at 74.2 and Terminal-Bench 2.1 at 90.6, ahead of V4 Pro. It is a strong default for repository, test, and CLI loops; keep a Pro comparison on GPQA-style knowledge tasks until you measure your own evals.

What happens to deepseek-v4-pro on September 14, 2026?

From 04:00 UTC on September 14, 2026, DeepSeek will route deepseek-v4-pro to V4.1 Flash at Flash prices until V4.1 Pro ships. The endpoint name stays; the underlying model changes.

Is DeepSeek V4.1 Flash open source? Can I run it locally?

PoYo hosts the API, so you do not need local weights to call it. Earlier DeepSeek V4 Flash checkpoints were released with MIT-licensed weights for self-hosting. That path is separate from the hosted PoYo API—confirm whether DeepSeek has published V4.1 Flash weights before you plan a local deploy.

Does DeepSeek V4.1 Flash support images?

Yes. It natively understands JPEG, PNG, GIF, and WebP with text. It generates text, not images. Image tokens are billed as input. That covers most screenshot and document jobs that previously needed deepseek-v4-flash-vision-exp.

How do I use DeepSeek V4.1 Flash API?

Create a key in the dashboard, then call https://api.poyo.ai/v1/chat/completions with model deepseek-flash. Related searches for API key and API URL point here—not a free DeepSeek download.

Why Use PoYo for DeepSeek V4.1 Flash API Access

01

Instant Access

No waitlist. Create a PoYo API key and send Chat Completions to V4.1 Flash.

02

Matches official peak rates

See cached input, input, and output in credits and USD. Aggregator SERP pages currently list near-list DeepSeek prices.

03

Developer Friendly

OpenAI-compatible Chat Completions at <code>https://api.poyo.ai/v1</code>, plus the same docs path as other DeepSeek models on PoYo.

04

Reliable Infrastructure

Pay-as-you-go credits, usage in the dashboard, and a single catalog next to V4 Pro and Kimi K3.

05

One catalog

Compare V4.1 Flash with V4 Pro, Kimi K3, Gemini, and Claude without another vendor account.

06

Technical Support

Get help on model IDs, routing from retired Flash names, and production integration.