DeepSeek V4.1 Flash 1017

DeepSeekMCP Tool CallReasoning

deepseek/deepseek-v4.1-flash-1017Open Weights

October 17 update of DeepSeek V4.1 Flash with improved reasoning, coding, agentic tasks, and visual understanding

Benchmark Pricing$0.15 / 1M in$0.60 / 1M out$0.00 cache read

Context: 1,000,000 tokens•Max Output: 384,000 tokens•Knowledge: 2025-05•Released: 2026-10-17

TECHNICAL SPECIFICATIONS

Context Window1,000,0001M tokens

Max Output384,000384K tokens

LicenseMITSelf-hostable

Input Modalities

TextVision

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ DeepSeek V4.1 Flash 1017 natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 1,000,000 tokens, this model can handle extremely large MCP resource manifests, complete database schemas, and multiple active server tool definitions simultaneously without degradation.

STANDARDIZED BENCHMARKS & EVALS

Humanity's Last ExamUnit not reported

42.6

Humanity's Last ExamUnit not reported

Terminal-BenchUnit not reported

42.3

DeepSWEUnit not reported

ProgramBenchUnit not reported

29.1

NL2RepoUnit not reported

68.2

AutomationBenchUnit not reported

60.5

Agents' Last ExamUnit not reported

35.4

Apex BenchUnit not reported

72.1

ChartographyUnit not reported

BabyVisionUnit not reported

92.5

ZeroBenchpass@5

API CALL INVOCATION EXAMPLE

// Example: Calling DeepSeek V4.1 Flash 1017 via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.DEEPSEEK_API_KEY,
});

const response = await client.chat.completions.create({
  model: "deepseek/deepseek-v4.1-flash-1017",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);