CrossModel
DeepSeek V4 Flash
deepseek/deepseek-v4-flash
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DeepSeek · Model guide

DeepSeek V4 Flash

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deepseek/deepseek-v4-flashReleased Jul 31, 2026

A compatibility alias, kept so existing integrations keep working. DeepSeek retired the V4 Flash model on 2026-09-10, and requests to this id are served by DeepSeek V4.1 Flash — a natively multimodal model with the same 1M-token context window. New integrations should target DeepSeek V4.1 Flash directly, because the specification behind this id is now whatever V4.1 Flash provides.

Modalities
TextText
Context
1M
Max output
384K
Price / 1M tokens
$ 0.30in$ 1.20out
StreamingTool callingJSON outputImage inputThinking mode · can be turned off

What this model is good at

What the vendor positions it for, and which of our models to reach for instead.

VendorThe more economical V4 model, intended for cost-sensitive and simpler agent workloads.source

Best for

  • Cost-sensitive coding agents · Strong software-engineering scores with lower serving cost than Pro.(vendor claim)source

  • High-volume tool workflows · Flash is positioned for simpler agents and cost-sensitive production workloads.(vendor claim)source

Neighbouring models
Compare them side by side →

Pricing and billing

Billed per token. Cached input is charged at the cache-read rate.

Price / 1M tokensYou pay
Input$ 0.30
Output$ 1.20
Cache read$ 0.0060
Cache write$ 0.30
Estimate a request
$ 0.0054
Estimated cost per request
10.0K × $ 0.30
+ 2.0K × $ 1.20
≈ $ 5.40 per 1,000 requests

Capabilities and limits

What CrossModel guarantees across every route this model can take right now.

Context window
1.0M tokens
Max output
384.0K tokens
Input / output modalities
Text → Text
Streaming
Supported
Tool calling
Supported
Structured output (JSON)
Supported
Image input
Not supported
Thinking mode
Supported· can be turned off
Reasoning effort
low · medium · high · xhigh · max
Available endpoints
/v1/chat/completions · /v1/responses · /v1/messages
First-party sources:Specshuggingface.co 1huggingface.co 2api-docs.deepseek.com 3api-docs.deepseek.com 4Capabilitiesapi-docs.deepseek.com 1api-docs.deepseek.com 2api-docs.deepseek.com 3api-docs.deepseek.com 4api-docs.deepseek.com 5

Use it in your tools

Point the base URL at CrossModel and paste this model ID — every tool below has a setup guide.

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Open WebUI
Open-source, self-hosted AI chat interface
Continue
Open-source AI coding assistant for VS Code & JetBrains
See all integration guides →

Frequently asked questions

What is DeepSeek V4 Flash?
DeepSeek V4 Flash is available on CrossModel as deepseek/deepseek-v4-flash. It has a 1M-token context window and can return up to 384K tokens per request.
How much does DeepSeek V4 Flash cost?
Currently $ 0.30 per 1M input tokens and $ 1.20 per 1M output tokens. Cached input is billed at $ 0.0060 per 1M.
Does DeepSeek V4 Flash support tool calling and structured output?
Tool calling: Supported · Structured output (JSON): Supported · Image input: Not supported · Streaming: Supported · Thinking mode: Supported
Which endpoint do I call?
For text models, OpenAI Chat Completions (/v1/chat/completions), OpenAI Responses (/v1/responses) and Anthropic Messages (/v1/messages) all work — pick whichever your SDK already speaks.
Can I try it without writing code?
Yes. Sign in and open the Playground on this page to chat with the model directly — no API key needed. Usage is billed from your wallet at the normal rate.

Chat first, integrate later

Chat first, then wire it in once you like the answers.