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DeepSeek

DeepSeek V4.1 Flash 1017

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DeepSeek
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DeepSeek's October 2026 checkpoint of the V4.1 Flash workhorse, refreshed for stronger agentic coding with shorter, faster answers. Same 552B-parameter sparse mixture-of-experts backbone as V4.1 Flash (8B active on input, 16B on output) on the Causal Encoder-Decoder architecture, with a 1M-token context and image understanding trained from pretraining.

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DeepSeek V4.1 Flash 1017 is somewhat expensive at $0.15/M tokens input and $0.60/M tokens output. Cached input reads are priced at $0.003/M tokens, making repeated context cheaper. The model supports vision/image input, extended reasoning, a 1M context window.

Best forLong-context analysisVision tasksCost-effective

Benchmarks

CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter

Specifications

Vision
Audio
Reasoning
MoE
Architecture
552B
Parameters
16B
Active
1.0M
Context
256K
Max output

Performance

Providers

Misc

October 17, 2026
Released
Same family
DeepSeekDeepSeek V4.1 Flash
CompareChat with DeepSeek V4.1 Flash 1017

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Frequently Asked Questions about DeepSeek V4.1 Flash 1017▼

When was DeepSeek V4.1 Flash 1017 released?

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DeepSeek V4.1 Flash 1017 was released on October 17, 2026.

Who created DeepSeek V4.1 Flash 1017?

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DeepSeek V4.1 Flash 1017 was created by DeepSeek.

How much does DeepSeek V4.1 Flash 1017 cost?

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DeepSeek V4.1 Flash 1017 costs $0.15/M input tokens and $0.60/M output tokens.

What is DeepSeek V4.1 Flash 1017 API pricing?

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The DeepSeek V4.1 Flash 1017 API is priced at $0.15 per million input tokens and $0.60 per million output tokens. You can access DeepSeek V4.1 Flash 1017 through idapt.app alongside 200+ other AI models in one workspace.

Is DeepSeek V4.1 Flash 1017 a reasoning model?

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Yes, DeepSeek V4.1 Flash 1017 is a reasoning model. It can think step-by-step through complex problems before providing an answer, often yielding better results on difficult tasks like math, coding, and multi-step logic.

Does DeepSeek V4.1 Flash 1017 support image or vision input?

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Yes, DeepSeek V4.1 Flash 1017 supports vision/image input. You can share images in your conversation and the model will analyze and respond based on their content.

Does DeepSeek V4.1 Flash 1017 support audio?

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No, DeepSeek V4.1 Flash 1017 does not support audio input.

What is the context window of DeepSeek V4.1 Flash 1017?

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DeepSeek V4.1 Flash 1017 has a context window of 1M tokens, meaning it can process approximately 786,432 words of context at once.

Is DeepSeek V4.1 Flash 1017 open source?

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DeepSeek V4.1 Flash 1017 is a proprietary model developed by DeepSeek. The model weights and training data are not publicly available.

What is DeepSeek V4.1 Flash 1017 good at?

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Based on benchmark data, DeepSeek V4.1 Flash 1017 excels at: visual analysis and image understanding. It is DeepSeek's capable model suitable for a wide range of tasks.

Where can I use DeepSeek V4.1 Flash 1017?

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You can chat with DeepSeek V4.1 Flash 1017 on idapt.app — no separate API key required. idapt is an AI workspace with 200+ models, agents, computers, and tasks. You can also access DeepSeek V4.1 Flash 1017 through DeepSeek's own API or platform.

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