DeepSeek

DeepSeek V4.1-Flash

Vérifié par l’équipe de recherche de GetInfoUsDernière révision : October 2026Politique éditoriale
58
Intelligence Index

763B total / 16B actif causal encoder-decoder MoE avec 1/4 KV-cache usage, natif vision, MIT license, et monde-record faible off-sommet tarification.

Technical Specifications

Provider
DeepSeek
Category
open-source
Release Date
2026-09
Knowledge Cutoff
June 2026
Architecture
Causal Encoder-Decoder (20 enc + 20 dec layers)
Parameters
763B total (8B prefill / 16B decode active)
Context Window
1M tokens
Max Output
384K tokens
Cached Input Price
$0.006 / 1M tokens
Batch API Discount
50% off async batch
Consumer Subscription
Free / Self-Hosted
Reasoning Mode
Yes (Chain-of-Thought)
Reasoning Effort Control
Configurable (Low / Med / High)
Tool Calling
Yes
Structured Outputs
Yes
Open Weights
Yes (Open Source / Self-Hostable)
Input Modalities
text, vision
Output Modalities
text
Official Documentation
Visit Official Docs ↗

Data Privacy, Licensing & Deployment Governance

API Data Training Policy
100% Isolated when self-hosted on private GPUs or VPC
Model License & Commercial Rights
Permissive Open-Weights (Apache 2.0 / MIT Commercial)
Deployment & Cloud Availability
Self-Hosted GPU (vLLM / Ollama), Private VPC, or Managed Serverless API
Output Ownership
Full commercial ownership of generated outputs

Official Provider Release Intelligence, API Quotas & Agentic Specs

Compare Multi-Models Side-by-Side →
Official API Model ID (SDK String)
deepseek-reasoner
Supported SDK & API Protocol
OpenAI-Compatible REST / vLLM / SGLang / HuggingFace TGI
Lifecycle & Deprecation Status
Active GA (Guaranteed support through 2028+)
Production Rate Limits (RPM & TPM)
Unlimited (Hardware-bound on self-hosted GPU) / 10,000 RPM Cloud · Unlimited local throughput / 10M+ TPM Managed Cloud
Long-Context Pricing Tier (>128K / >200K)
Flat rate ($0.3/1M in) across full 1000K window
Prompt Cache Write & TTL Policy
Automatic prefix caching at $0.006/1M (no extra cache-write fee)
Computer Use & Browser GUI Agent
API / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)
MCP & Parallel Tool Calling
Native MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema
Web Search Grounding & Code Sandbox
Supported via external Tavily/Exa Search & E2B/Docker Sandbox tools
Fine-Tuning & Distillation Support
Full Weights SFT, LoRA, QLoRA, DPO & GRPO RL (Unsloth / Axolotl / Llama-Factory)
Multimodal Tokenization Billing
Text BPE (~4 chars/token) · Vision (~258–765 tokens per image tile)
Weights Precision & Quantization
BF16 / FP16, FP8 Dynamic, INT4 AWQ / GPTQ, GGUF (Q4_K_M / Q8_0)
Minimum GPU VRAM Requirement
473 GB VRAM (4-bit Quantized) · 1640 GB VRAM (Native BF16)
Supported Inference Engines
vLLM, SGLang, Ollama, llama.cpp, TensorRT-LLM, HuggingFace TGI
System Card & Safety Framework
Open-Weights System Card + Customizable Guardrail Layer (Llama Guard / ShieldGemma)
Enterprise Compliance (SOC2 / HIPAA / ZDR)
100% Air-Gapped On-Premises / Private VPC · Full HIPAA, GDPR & SOC2 Control
Engineering & Pricing Workbench

DeepSeek V4.1-Flash Cost, Context, Hardware & API Integration

500 / day
4,000 tok
1,000 tok
Conversation Depth (History Re-billing):1 Turn (Single-Shot)
50%
Estimated Monthly API Cost (30 Days)
$27.18$36.00
Monthly Savings: $8.82 (Caching/Batch)
Subscription ($20/mo) vs API

For single-user chat, a $20/mo subscription caps your bill below this API volume.

Break-even point: ~368 requests/day equals $20/month.

Same Monthly Workload Cost Across Popular Reference Models

DeepSeek V4.1-Flash (Active)
$27.18
/ month
Gemini 2.5 Flash
$18.00
/ month
DeepSeek V3
$32.70
/ month
GPT-4o
$300.00
/ month
Claude 3.7 Sonnet
$405.00
/ month

Live Prompt Paste Tokenizer & Cost Counter

Paste real system instructions, JSON schemas, or code to measure BPE token counts across tokenizers.

Chars / Words
175 / 24
OpenAI o200k
~46 tok
Claude BPE
~49 tok
Llama / DeepSeek
~51 tok

Hybrid Prompt Routing Cascade Simulator

Route routine queries to a fast lightweight model ($0.15/1M) and escalate only complex reasoning turns to DeepSeek V4.1-Flash:

Cascaded Monthly Bill:$20.29/mo
Saves $6.88/mo (25% cost reduction) vs sending 100% of traffic to DeepSeek V4.1-Flash.

Benchmark Scores & 6-Axis Capability Radar

Benchmark Encyclopedia
Coding (85)Reasoning (100)Knowledge (90)Speed (73)Context (100)Cost Value (84)
DeepSeek V4.1-Flash2026 Frontier Median
SWE-bench Verified
74.2%
GPQA Diamond
90.9%
MMLU-Pro
89.5%
HumanEval
96.5%
Humanity's Last Exam
16.8%
Terminal-Bench
31.2%
SciCode
48%
LiveCodeBench
73%
AIME
92.4%
Long-Context Reasoning
93%
Chatbot Arena Elo
1455pts

Strengths

  • MIT permissive ouvert license avec complet weights, architecture, et code
  • Revolutionary causal encoder-decoder architecture: KV cache seulement 890 bytes/token (fonctionne sur commodity NVMe SSDs)
  • de monde le plus bas tarification: off-sommet cached entrée à just $0.003/1M et $0.27 coût par benchmark tâche
  • Colossal 1M contexte entrée paired avec 384,000 maximum sortie tokens et natif vision

Limitations & Trade-offs

  • Extremely verbose génération (averages 8.9K sortie tokens par inquiry sans explicit caps)
  • à long terme performances degrades sur Terminal-Bench 4.0 (31.2%)
  • Factual knowledge recall dips sur SimpleQA (42.3) et vision résolution est capped à 672x672
  • Highly sensitive à agent harness prompts et system prompt engineering

Editorial Assessment

un architectural tour-de-force qui destroys KV-cache bottlenecks et sets un tous-temps faible prix ceiling pour ouvert de pointe AI.

Best for: Extreme économique batch traitement, auto-hébergé commodity matériel clusters, et massif au format long raisonnement tâches

Frequently Asked Questions about DeepSeek V4.1-Flash

How much does the DeepSeek V4.1-Flash API cost per 1M tokens?+

DeepSeek V4.1-Flash by DeepSeek is priced at $0.3 per 1M input tokens and $1.2 per 1M output tokens. With prompt caching enabled, cached input tokens cost $0.006 per 1M tokens, and asynchronous Batch API requests receive a 50% discount.

Should I use a $20/month subscription or the DeepSeek V4.1-Flash pay-as-you-go API?+

A flat $20/month consumer subscription is predictable for daily interactive chat and manual coding. However, if you are building software, running automated workflows, or sending low-to-moderate volume with prompt caching enabled, the pay-as-you-go API is typically far more cost-effective and offers higher rate limits without manual UI caps.

How many words and pages fit in DeepSeek V4.1-Flash's context window?+

DeepSeek V4.1-Flash features a 1M tokens context window, which equals approximately 750,000 English words or ~2,000 standard single-spaced pages in a single prompt. Its maximum output generation per turn is 384,000 tokens.

Can I run DeepSeek V4.1-Flash locally on my own GPU (Open Weights)?+

Yes, DeepSeek V4.1-Flash (763B total (8B prefill / 16B decode active)) releases open weights that can be self-hosted locally or on private cloud GPUs using vLLM, Ollama, SGLang, or llama.cpp.

Does DeepSeek train on data sent to the DeepSeek V4.1-Flash API, and is commercial use allowed?+

100% Isolated when self-hosted on private GPUs or VPC. License tier: Permissive Open-Weights (Apache 2.0 / MIT Commercial). Full commercial ownership of generated outputs. Supported deployment channels include: Self-Hosted GPU (vLLM / Ollama), Private VPC, or Managed Serverless API.

How does DeepSeek V4.1-Flash perform on coding and reasoning benchmarks?+

DeepSeek V4.1-Flash achieves a composite Intelligence Index of 58/100, scoring 74.2% on SWE-bench Verified, 90.9% on GPQA Diamond, 89.5% on MMLU-Pro, and 1455 pts on Chatbot Arena Elo.

What is DeepSeek V4.1-Flash best used for?+

DeepSeek V4.1-Flash is best suited for: Extreme économique batch traitement, auto-hébergé commodity matériel clusters, et massif au format long raisonnement tâches. Assessment: un architectural tour-de-force qui destroys KV-cache bottlenecks et sets un tous-temps faible prix ceiling pour ouvert de pointe AI.

Les scores de benchmarks, tarifs par token et limites évoluent rapidement. Vérifiez toujours les spécifications actuelles sur la documentation officielle du fournisseur.

Sources: DeepSeek V4.1-Flash Technical Report & Open Weights Release (September 2026)↗