DeepSeek V4.1 Flash vs Qwen3.5 397B A17B: Release Comparison

Name: Intelligence
Creator: Artificial Analysis
License: https://artificialanalysis.ai/docs/legal/Terms-of-Use.pdf

Comparison of the DeepSeek V4.1 Flash and Qwen3.5 397B A17B releases: 2 and 2 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 4 models.

For intelligence, DeepSeek V4.1 Flash scores highest: DeepSeek V4.1 Flash (Max) at 39, against Qwen3.5 397B A17B (Non-reasoning) at 21 for Qwen3.5 397B A17B.
For output speed, DeepSeek V4.1 Flash is fastest: DeepSeek V4.1 Flash (Max) at 177 t/s, against Qwen3.5 397B A17B (Non-reasoning) at 56 t/s for Qwen3.5 397B A17B.
For cost per task, DeepSeek V4.1 Flash is cheapest: DeepSeek V4.1 Flash (Non-reasoning) at $0.15, against Qwen3.5 397B A17B (Reasoning) at $0.47 for Qwen3.5 397B A17B.

Model Playground

Releases compared


	DeepSeek V4.1 Flash (max)	DeepSeek V4.1 Flash (non-reasoning)	Qwen3.5 397B A17B (non-reasoning)	Qwen3.5 397B A17B
Intelligence Index	39	25	21*	18
Finance & Accounting	45	30	--	19
Strategy & Ops	52	36	--	15
Legal	41	30	--	21
Healthcare & Medical	41	--	--	--
Engineering	39	25	--	21
Economics	44	32	--	27
AA-Briefcase v1.1	1422	1118	--	562
GDPval-AA v2.1	1600	1341	--	793
AutomationBench-AA	68.9%	47.8%	--	6.9%
Terminal-Bench 4.0	26.8%	5.6%	--	0.0%
SciCode	51.9%	35.5%	--	44.8%
Humanity's Last Exam	39.2%	10.8%	19.8%	29.0%
GDP.pdf	12.8%	3.8%	--	12.2%
CritPt	14.3%	0.3%	0.9%	1.7%
AA-Omniscience	−5	−10	−38	−31
AA-LCR v1.1	84.0%	55.3%	64.3%	77.3%

Cost per TaskUSD	$0.27	$0.15	--	$0.47
Input PriceUSD/1M Tokens	$0.30	$0.30	$0.60	$0.60
Output PriceUSD/1M Tokens	$1.20	$1.20	$3.60	$3.60
Cache Hit PriceUSD/1M Tokens	$0.006	$0.006	--	--
Cache Write PriceUSD/1M Tokens	--	--	--	--

Output SpeedTokens/s	177	175	56	56
Time to First Tokens	1.13	1.13	2.44	2.45
Time to First Answer Tokens	12.46	1.13	2.44	59.69
End-to-End Response Times	15.29	3.98	11.32	68.67
Time per Tasks	350.86	196.03	--	316.44

Context Window	1M	1M	262k	262k
Creator	DeepSeek	DeepSeek	Alibaba	Alibaba
License	Open	Open	Open	Open
Input Modality	Supports: text and image	Supports: text and image	Supports: text and image	Supports: text and image
Output Modality	Supports: text	Supports: text	Supports: text	Supports: text
Providers	+15	+4	+2	+4

* Estimated

Intelligence

Artificial Analysis Intelligence Index · Higher is better

Speed

Output tokens per second · Higher is better

Cost per Task

Weighted average cost (USD) per Intelligence Index task · Lower is better

Intelligence

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index v4.3.2 incorporates 10 evaluations: AA-Briefcase v1.1, GDPval-AA v2.1, AutomationBench-AA, Terminal-Bench 4.0, SciCode, Humanity's Last Exam, GDP.pdf, CritPt, AA-Omniscience, AA-LCR v1.1

Estimate (independent evaluation forthcoming)

Artificial Analysis Intelligence Index v4.3.2 includes: AA-Briefcase v1.1, GDPval-AA v2.1, AutomationBench-AA, Terminal-Bench 4.0, SciCode, Humanity's Last Exam, GDP.pdf, CritPt, AA-Omniscience, AA-LCR v1.1. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

Intelligence Index vs. Cost per Intelligence Index Task

Artificial Analysis Intelligence Index · Weighted average cost (USD) per Artificial Analysis Intelligence Index task

Most attractive quadrant

DeepSeek V4.1 Flash

Pareto line

AA-Briefcase v1.1

GDPval-AA v2.1

Cost per Task (USD, Log Scale)

Weighted average cost per Intelligence Index task. Each evaluation’s cost is calculated from input, cache hit, cache write, reasoning, and answer token prices, divided by task count, and weighted by its Intelligence Index weight.

Cost

Cost per Intelligence Index Task

Weighted average cost (USD) per Intelligence Index task · Segmented by token type · Lower is better

Speed & Latency

Output Speed

Output tokens per second · Higher is better

Tokens per second received while the model is generating tokens (ie. after first chunk has been received from the API for models which support streaming).

Figures represent performance of the model's first-party API or the median across providers where a first-party API is not available.

Capability Scores

Capability Indexes

Measures the performance of models on specific capabilities and industries

Finance & Accounting Index

Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, Humanity's Last Exam, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better

Strategy & Ops Index

Incorporates 6 evaluations: GDPval-AA v2.1, AA-Briefcase v1.1, AA-Omniscience, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better

Legal Index

Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, Humanity's Last Exam, AA-LCR v1.1, GDP.pdf, AutomationBench-AA · Higher is better

Healthcare & Medical Index

Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, MLCR-AA, Humanity's Last Exam, AutomationBench-AA · Higher is better

Engineering Index

Incorporates 6 evaluations: AA-Omniscience, Humanity's Last Exam, CritPt, GDPval-AA v2.1, AA-Briefcase v1.1, Terminal-Bench 4.0 · Higher is better

Economics Index

Incorporates 5 evaluations: AA-Omniscience, Humanity's Last Exam, GDPval-AA v2.1, AA-Briefcase v1.1, AA-LCR v1.1 · Higher is better

DeepSeek V4.1 Flash vs Qwen3.5 397B A17B: Release Comparison

Intelligence

Speed

Cost per Task

Intelligence

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index

Intelligence Index vs. Cost per Intelligence Index Task

Cost per Intelligence Index Task

Artificial Analysis Intelligence Index

Cost

Cost per Intelligence Index Task

Cost per Intelligence Index Task

Speed & Latency

Output Speed

Output Speed

Model Performance Representation

Capability Scores

Capability Indexes