ResearchLLM Verifications Leaderboard

Data as of · 78 models, 80 questions · reviewed by Suhas Bhairav · methodology

Head to head · tested 27 Oct 2026

DeepSeek V4.1 Flash 1017 vs DeepSeek V4 Pro 0813: accuracy, speed and price

Similar accuracy; DeepSeek V4.1 Flash 1017 costs less per question.

DeepSeekDeepSeek V4.1 Flash 101773.8% score · #18$0.00091 per question57 tok/sDeepSeekDeepSeek V4 Pro 081371.2% score · #24$0.0036 per question56 tok/s

Verdict

Built from the measurements below

  • Accuracy is too close to call: DeepSeek V4.1 Flash 1017 scored 73.8% and DeepSeek V4 Pro 0813 71.2% on the same 80 questions, a gap within what chance alone could produce.
  • DeepSeek V4.1 Flash 1017 is 4.0× cheaper per question as billed ($0.00091 vs $0.0036), reasoning tokens included.
  • Output speed is similar (57 vs 56 tokens per second).

Which should you choose?

Choose DeepSeek V4.1 Flash 1017 for the lower cost per correct answer ($0.0012 against $0.0051) and more hosts to choose from on OpenRouter (30 against 23).

Accuracy gap +2.5 points (z = 0.35). A winner is called only when z is at least 1.96, the usual 95% threshold. Speed, latency and price need a 10% margin.

Head to head

Same questions, same prompt, same API

MeasureDeepSeek V4.1 Flash 1017DeepSeek V4 Pro 0813Edge
Verification scoreHigher is better73.8%71.2%Too close to call
Cost per questionLower is better$0.00091$0.0036DeepSeek V4.1 Flash 1017
Output speedHigher is better5756Similar
Time to first tokenLower is better0.9 s0.8 sSimilar
End-to-end response timeLower is better7.3 s10.1 sDeepSeek V4.1 Flash 1017
Tokens per questionLower is better1,3181,318Similar
Context windowHigher is better1M1MSimilar

Side by side

Bars are scaled to the larger of the two values. The winner on each measure is marked in bold.

Every measure

DeepSeek V4.1 Flash 1017 first, DeepSeek V4 Pro 0813 second

Verification scorehigher is better
DeepSeek V4.1 Flash 101773.8%
DeepSeek V4 Pro 081371.2%
Cost per questionlower is better
DeepSeek V4.1 Flash 1017$0.00091
DeepSeek V4 Pro 0813$0.0036
Output speedhigher is better
DeepSeek V4.1 Flash 101757
DeepSeek V4 Pro 081356
Time to first tokenlower is better
DeepSeek V4.1 Flash 10170.9 s
DeepSeek V4 Pro 08130.8 s
End-to-end response timelower is better
DeepSeek V4.1 Flash 10177.3 s
DeepSeek V4 Pro 081310.1 s
Tokens per questionlower is better
DeepSeek V4.1 Flash 10171,318
DeepSeek V4 Pro 08131,318
Context windowhigher is better
DeepSeek V4.1 Flash 10171M
DeepSeek V4 Pro 08131M

Score vs. cost per question

Both models in color, every other model in grey

Most attractive quadrant0255075100$0.00001$0.0001$0.001$0.01$0.10Cost per question (USD, log) →Verification score (%) →Qwen3.8 2.4T A95BCommand AReka Flash 3Gemma 4 26B A4BGemma 4 31BQwen3.5 397B A17BHermes 4 405BMuse WonderGrok 4.7o3gpt-oss-20bMinistral 3 3B 2512Nova Micro 1.0Phi 4Granite 4.2 8BHy3GLM 5.3 FlashSolar Pro 4Trinity Large ThinkingMiniMax M3Mistral Large 4Claude Opus 5.5DeepSeek V4.1 Flash 1017Gemini 4 ArgonGPT-5.4gpt-oss-120bLlama 4 Maverick

Specifications and pricing

From OpenRouter's catalogue, plus the leaderboard's test dates

SpecificationDeepSeek V4.1 Flash 1017DeepSeek V4 Pro 0813
CreatorDeepSeekDeepSeek
Released17 Oct 202612 Aug 2026
WeightsOpen weightsOpen weights
ReasoningYesYes
Inputtext, imagetext
Outputtexttext
Context window1M tokens1M tokens
Knowledge cutoff——
List price in / out per 1M$0.15 / $0.6$1.32 / $3.96
Blended price per 1M (3:1)$0.26$1.98
Cheapest hostSail Research · $0.101 / $0.15Baidu · $0.13992 / $0.41976
Hosts on OpenRouter3023
Last tested25 Oct 202626 Oct 2026

Compare any two models →

DeepSeek V4.1 Flash 1017 vs DeepSeek V4 Pro 0813: frequently asked questions

Is DeepSeek V4.1 Flash 1017 better than DeepSeek V4 Pro 0813?
On accuracy they are statistically tied: DeepSeek V4.1 Flash 1017 scored 73.8% and DeepSeek V4 Pro 0813 71.2% on the same 80 questions from open datasets. Similar accuracy; DeepSeek V4.1 Flash 1017 costs less per question.
Which is cheaper, DeepSeek V4.1 Flash 1017 or DeepSeek V4 Pro 0813?
DeepSeek V4.1 Flash 1017 is cheaper: $0.00091 per question as billed, against $0.0036. List prices: DeepSeek V4.1 Flash 1017 $0.15 in / $0.6 out, DeepSeek V4 Pro 0813 $1.32 in / $3.96 out per million tokens.
Which is faster, DeepSeek V4.1 Flash 1017 or DeepSeek V4 Pro 0813?
Their output speed is similar: 57 and 56 tokens per second.
Which has the larger context window, DeepSeek V4.1 Flash 1017 or DeepSeek V4 Pro 0813?
Both accept about the same amount of context: 1M and 1M tokens.