# DeepSeek V4.1 Flash:thinking API DeepSeek's DeepSeek V4.1 Flash:thinking, through an OpenAI-compatible API. 2 providers quote it now, and each request goes to the offer with the lowest estimated charge that meets your rules. - Providers compete for each request. The exchange ranks the offers that meet your rules by estimated charge. It fixes your maximum charge before the first token, and you pay for the tokens that the model uses. - The OpenAI and Anthropic APIs. Use the OpenAI or Anthropic SDK that you have. Set the base URL and your key, and send deepseek-v4.1-flash:thinking as the model. - Your data rules. Send x-liquid-retention: none and only offers whose provider does not keep your content compete for the request. ## Facts - Model name: deepseek-v4.1-flash:thinking - Maker: DeepSeek - Context window: 1M tokens - Input price: $0.270 to $0.405 per million tokens - Output price: $0.0099 to $1.000 per million tokens - Providers: 2 independent providers - Regions: global, us ## Providers - [Munito AI](https://liquidinference.ai/providers/9dcb5dfe-3784-4ceb-a295-97dbe47862e9.md): global, $0.270 input and $1.000 output per million tokens, $0.0054 cache read per million tokens, 1M tokens of context - [Pera](https://liquidinference.ai/providers/f651491e-f85b-4f03-b80c-32876aeb80ce.md): us, $0.405 input and $0.0099 output per million tokens, $0.405 cache read per million tokens, $0.0043 fee for each request, 1M tokens of context ## Scores - HLE: 39.2, #50 of 273 - AA-LCR: 84.0, #7 of 237 - SciCode: 51.9, #43 of 123 - SimpleQA Verified: 42.9, #46 of 126 Scores: Artificial Analysis (https://artificialanalysis.ai/) Scores: Epoch AI, 'Capabilities & Benchmarking' (https://epoch.ai/benchmarks) ## Request ```sh curl https://router.inference.ai.exchange/v1/chat/completions \ -H "Authorization: Bearer $LIQUID_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "deepseek-v4.1-flash:thinking", "messages": [{"role":"user","content":"Say hello."}] }' ``` ## Questions ### What is DeepSeek V4.1 Flash:thinking? DeepSeek V4.1 Flash:thinking is a model from DeepSeek. ### How much does DeepSeek V4.1 Flash:thinking cost? Offers now ask $0.270 to $0.405 per million input tokens and $0.0099 to $1.000 per million output tokens. A job pays for the tokens it uses. The exchange picks the cheapest eligible offer. ### What is the context length of DeepSeek V4.1 Flash:thinking? The largest offer takes 1,048,576 input tokens. One job can generate up to 131,072 tokens. A smaller offer can take less. The exchange skips an offer that cannot take your message. ### What can DeepSeek V4.1 Flash:thinking do? Its providers list Vision, Reasoning effort, JSON object, JSON schema, Frequency penalty, Log probabilities, Presence penalty, Repetition penalty, Seed, Stop sequences, Top-k sampling, Top-p sampling, Text, Tools. ### What inputs and outputs does DeepSeek V4.1 Flash:thinking support? Text · Images → Text. ### Which providers serve DeepSeek V4.1 Flash:thinking? 2 independent providers quote it now, with 2 offers. The table above ranks them by the cost of a typical job. ### How do I call DeepSeek V4.1 Flash:thinking? Send "deepseek-v4.1-flash:thinking" as the model in an OpenAI or Anthropic request. The API section links to setup steps for each client. ### When was DeepSeek V4.1 Flash:thinking listed? The exchange first listed it on 10/10/2026. This is not its release date. ## Related pages - [This page in a browser](https://liquidinference.ai/models/deepseek-v4.1-flash%3Athinking) - [DeepSeek V4 Flash 0731](https://liquidinference.ai/models/deepseek-v4-flash-0731.md) - [DeepSeek V4 Flash](https://liquidinference.ai/models/deepseek-v4-flash.md) - [DeepSeek V4.1 Flash](https://liquidinference.ai/models/deepseek-v4.1-flash.md) - [DeepSeek V4.1 Flash 1017:thinking](https://liquidinference.ai/models/deepseek-v4.1-flash-1017%3Athinking.md) - [DeepSeek V4.1 Flash 1017](https://liquidinference.ai/models/deepseek-v4.1-flash-1017.md) - [DeepSeek V4 Flash 0731:thinking](https://liquidinference.ai/models/deepseek-v4-flash-0731%3Athinking.md) - [Set up a client](https://liquidinference.ai/connect/deepseek-v4.1-flash%3Athinking) - [All models](https://liquidinference.ai/models) - [Providers](https://liquidinference.ai/providers.md) - [Discover the best model for your budget](https://liquidinference.ai/discover) - [Quickstart](https://liquidinference.ai/docs/quickstart.md) - [llms.txt: the index of every page, as Markdown](https://liquidinference.ai/llms.txt) - [llms-full.txt: every page in one file](https://liquidinference.ai/llms-full.txt)