Claude Haiku 5.5 vs DeepSeek V4.1 Flash: Release Comparison

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

Comparison of the Claude Haiku 5.5 and DeepSeek V4.1 Flash releases: 5 and 2 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 7 models.

For intelligence, Claude Haiku 5.5 scores highest: Claude Haiku 5.5 (Max, Default Fallback) at 43, against DeepSeek V4.1 Flash (Max) at 39 for DeepSeek V4.1 Flash.
For output speed, Claude Haiku 5.5 is fastest: Claude Haiku 5.5 (Max, Default Fallback) at 243 t/s, against DeepSeek V4.1 Flash (Non-reasoning) at 219 t/s for DeepSeek V4.1 Flash.
For cost per task, Claude Haiku 5.5 is cheapest: Claude Haiku 5.5 (Low, Default Fallback) at $0.02, against DeepSeek V4.1 Flash (Non-reasoning) at $0.15 for DeepSeek V4.1 Flash.

Model Playground

Releases compared


	Claude Haiku 5.5 (max with fallback)	Claude Haiku 5.5 (xhigh with fallback)	DeepSeek V4.1 Flash (max)	Claude Haiku 5.5 (high with fallback)	Claude Haiku 5.5 (medium with fallback)	Claude Haiku 5.5 (low with fallback)	DeepSeek V4.1 Flash (non-reasoning)
Intelligence Index	43	41	39	38	34	29	25
Finance & Accounting	44	41	45	38	35	29	30
Strategy & Ops	40	39	52	37	34	28	36
Legal	42	40	41	38	36	31	30
Healthcare & Medical	--	--	41	--	--	--	--
Engineering	45	43	39	39	35	31	25
Economics	51	49	44	46	43	37	32
AA-Briefcase v1.1	1578	1533	1420	1443	1372	1112	1117
GDPval-AA v2.1	1620	1511	1600	1420	1277	1125	1343
AutomationBench-AA	35.4%	36.0%	68.9%	33.7%	28.6%	22.9%	47.8%
Terminal-Bench 4.0	32.8%	29.3%	26.8%	21.7%	15.2%	12.6%	5.6%
SciCode	55.0%	51.7%	51.9%	48.7%	49.0%	49.2%	35.5%
Humanity's Last Exam	44.4%	42.7%	39.2%	37.3%	33.8%	27.0%	10.8%
GDP.pdf	20.8%	18.2%	12.8%	17.2%	15.2%	11.2%	3.8%
CritPt	18.9%	22.6%	14.3%	18.6%	12.9%	9.1%	0.3%
AA-Omniscience	11	6	−5	6	4	3	−10
AA-LCR v1.1	82.7%	78.3%	84.0%	77.3%	77.3%	72.0%	55.3%

Cost per TaskUSD	$0.21	$0.12	$0.27	$0.08	$0.05	$0.02	$0.15
Input PriceUSD/1M Tokens	$0.10	$0.10	$0.30	$0.10	$0.10	$0.10	$0.30
Output PriceUSD/1M Tokens	$0.50	$0.50	$1.20	$0.50	$0.50	$0.50	$1.20
Cache Hit PriceUSD/1M Tokens	$0.01	$0.01	$0.006	$0.01	$0.01	$0.01	$0.006
Cache Write PriceUSD/1M Tokens	$0.125	$0.125	--	$0.125	$0.125	$0.125	--

Output SpeedTokens/s	243	188	216	137	137	181	219
Time to First Tokens	415.30	87.15	1.12	26.15	12.63	6.28	1.06
Time to First Answer Tokens	415.30	87.15	10.38	26.15	12.63	6.28	1.06
End-to-End Response Times	417.35	89.80	12.69	29.81	16.29	9.04	3.35
Time per Tasks	427.18	291.49	297.88	235.33	144.82	61.83	155.52

Context Window	1M	1M	1M	1M	1M	1M	1M
Creator	Anthropic	Anthropic	DeepSeek	Anthropic	Anthropic	Anthropic	DeepSeek
License	Proprietary	Proprietary	Open	Proprietary	Proprietary	Proprietary	Open
Input Modality	Supports: text and image	Supports: text and image	Supports: text and image	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	Supports: text	Supports: text	Supports: text
Providers			+15				+3

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

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

Claude Haiku 5.5

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 Artificial Analysis 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: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, 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

Claude Haiku 5.5 vs DeepSeek V4.1 Flash: 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