DeepSeek V4.1 Flash
Provider：DeepSeek
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...
Key specs
- Context：1M
- Max output：384K
- Tokenizer：DeepSeek
- Released：2026-09-10
Token pricing
- Input price：$0.150 / 1M tokens
- Output price：$0.600 / 1M tokens
- Cache read：$0.0030 / 1M tokens
- Blended price：$0.263 / 1M tokens
Modalities
Text, Image
Use Cases
- Deep Reasoning & Analysis：Process long legal docs, academic papers, financial reports; multi-hop reasoning and evidence-chain tracing across huge contexts.（≈ $0.0048/call）
- Vision Understanding & Generation：Recognize data trends in charts, OCR scanned docs, analyze photos and produce structured reports.（≈ $0.0036/call）
- Chat & Support：FAQ auto-response, multi-turn dialogue, emotion detection — e-commerce, finance, gov.（≈ $0.0030/turn）
When to pick this model
Signals derived from public pricing and spec fields — not a benchmark. Validate with official docs and your own eval.
- Low input + output price: solid fit for high-frequency calls and batch processing.
- Low blended price: budget-friendly for fleet-scale deployment.
- Long context (>=1M tokens): well-suited for long-doc QA, code-base analysis, multi-turn agents.
- Long max output (>=30K tokens): strong fit for deep report / essay / document-drafting workflows.
- Multimodal (text+image): fit for image captioning, OCR, chart QA, vision-grounded reasoning.
FAQ
- What is the token pricing of DeepSeek V4.1 Flash? Input price $0.150 / 1M tokens, output price $0.600 / 1M tokens, blended about $0.263 / 1M tokens. Refer to DeepSeek’s official page for the exact rate.
- What context window does DeepSeek V4.1 Flash support? Context window is 1M, max output about 384K, suitable for long documents, multi-turn chat and complex reasoning.
- What scenarios is DeepSeek V4.1 Flash best for? Based on its capability and pricing, DeepSeek V4.1 Flash fits best: Deep Reasoning & Analysis, Vision Understanding & Generation, Chat & Support. See the Use Cases section for details and cost estimates.
- What input/output modalities does DeepSeek V4.1 Flash support? Supports Text, Image modality.
- Is DeepSeek V4.1 Flash a free model? DeepSeek V4.1 Flash is billed per token, not a free model.
- Which provider offers DeepSeek V4.1 Flash? DeepSeek V4.1 Flash is offered by DeepSeek.
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Full info：DeepSeek V4.1 Flash