API models · Side by side

DeepSeek V4 Pro vs DeepSeek V4.1 Flash

DeepSeek V4 Pro and DeepSeek V4.1 Flash come from the same company. Both are open-weight under the MIT licence, read about a million tokens, and are sold by many providers. Is Pro worth paying more for? Here is how they differ on price, inputs, limits and self-hosting.

The short answer

At every provider that sells both models, V4.1 Flash costs less than V4 Pro for input and for output. Flash also reads images, while Pro reads text only. Pro is the far larger model, at about 1.65 trillion parameters against about 763 billion for Flash. We compare the August 2026 release of V4 Pro, which replaces the April preview.

Estimate your monthly bill

Enter your own usage. We apply each model's current rates, including long-prompt pricing, for a 30-day month.

Try:
DeepSeek V4 Pro 0813$73.26per month
DeepSeek V4.1 Flash$36.00per month

A token is roughly three-quarters of an English word. Cached input, reasoning tokens, tools and media are not included.

Compare the details

Compare context, supported inputs and usage costs. Highlighted rows show a difference.

DeepSeek V4 Pro vs DeepSeek V4.1 Flash specifications
FeatureDeepSeek V4 Pro 0813DeepSeek V4.1 Flash
Input formatstextimage, text
Output formatstexttext
Context / position limit1,048,5761,048,576
Endpoint output limit (tokens)943,718943,718
Developer featuresfrequency penalty, Reasoning output, logit bias, logprobs, Output limit, min p, presence penalty, Reasoning controls, Thinking effort, repetition penalty, Response format, Seed, Stop sequences, Structured output, Temperature, Tool selection, Tool calling, top k, top logprobs, Sampling controlsfrequency penalty, Reasoning output, logit bias, logprobs, Output limit, min p, parallel tool calls, presence penalty, Reasoning controls, Thinking effort, repetition penalty, Response format, Seed, Stop sequences, Structured output, Temperature, Tool selection, Tool calling, top a, top k, top logprobs, Sampling controls
Cached input / 1M tokens$0.10$0.006000
USD input / 1M tokens$0.11$0.30
USD output / 1M tokens$4.44$1.20
Available API providers2028
Best provider uptime, last 24 h100%100%
Price range across providers (per 1M tokens)Input $0.100–$1.65, output $1.98–$8.00 across 20 providersInput $0.040–$3.00, output $0.42–$12.00 across 28 providers
Model identifierdeepseek/deepseek-v4-pro-0813deepseek/deepseek-v4.1-flash

API pricing

Prices are in USD per million tokens. Input is what you send; output is what the model generates. Chat subscriptions and API usage are billed separately.

Tools, images and additional reasoning can add charges. The examples below cover input and output tokens only.

Compare local models

What those prices mean in practice

Each example uses the same token budget for both models. These are calculations, not measured workloads. Cache discounts, media, tools and extra reasoning are excluded.

Token cost examples
WorkloadDeepSeek V4 Pro 0813DeepSeek V4.1 Flash
1,000 short requestsPer request: 2,000 input + 500 output tokens$2.44$1.20
100 document summariesPer request: 20,000 input + 1,000 output tokens$0.67$0.72
10 long-document requestsPer request: 300,000 input + 2,000 output tokens$0.42$0.92

Estimate = requests × (input tokens × input price + output tokens × output price) ÷ 1,000,000. Long-prompt rates are applied where the pricing data provides them. Real requests can use different amounts of output.

Beyond the price tag

Price depends on the provider

Neither model has one fixed price. About 21 providers sell V4 Pro and 32 sell V4.1 Flash, so the OpenRouter headline price is just the cheapest host that day. At each of the 17 providers that offer both, Flash is cheaper than Pro for input and output. One quirk: DeepSeek's own V4 Pro endpoint charges double in two weekday windows, 01:00 to 04:00 and 06:00 to 10:00 UTC. Use the live price range and calculator on this page with your own token counts.

Inputs, output limits and controls

V4.1 Flash accepts text and images. V4 Pro accepts text only. Both return text, support tool calling and structured output, and let you set a reasoning effort level. Output caps depend on the provider: about 16K to 944K tokens for Pro and about 131K to 944K for Flash.

Running them yourself

Both are free to download under the MIT licence, with no revenue or usage conditions. V4 Pro is about 1.65 trillion parameters, with about 49 billion active per token, so plan for a large multi-GPU cluster. V4.1 Flash is about 763 billion parameters, with 8 to 16 billion active per token. That is under half Pro's size, but still a multi-GPU job.

Which one should you pick?

Choose DeepSeek V4.1 Flash if you need image input, want the lower bill at any shared provider, or want the smaller model to self-host. Choose DeepSeek V4 Pro if you work with text only and want to test the much larger model on your hardest tasks. Either way, run both on your own prompts before committing.

Common questions

Is DeepSeek V4 Pro always more expensive than V4.1 Flash?

At every provider that sells both, yes, for both input and output. Across different providers the ranges overlap, so a cheap Pro host can undercut an expensive Flash host. Check the live range on this page.

Which DeepSeek V4 Pro does this page compare?

The August 2026 release, listed on OpenRouter as DeepSeek V4 Pro 0813. DeepSeek describes it as the official release that supersedes the April preview.

Can I run either model on one GPU?

No. Both need a multi-GPU cluster, though Flash is under half Pro's size. Our model hardware calculator can size a setup for you.