Claude Haiku 5.5 vs K2-V2: 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 K2-V2 releases: 5 and 3 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 8 models.

Model Playground

Releases compared


	Claude Haiku 5.5 (max)	Claude Haiku 5.5 (xhigh)	Claude Haiku 5.5 (high)	Claude Haiku 5.5 (medium)	Claude Haiku 5.5 (low)	K2-V2 (high)	K2-V2 (medium)	K2-V2 (low)
Intelligence Index	36	34	30	25	19	--	--	--
Finance & Accounting	44	41	38	35	29	--	--	--
Strategy & Ops	39	39	37	33	27	--	--	--
Legal	39	37	35	33	27	--	--	--
Healthcare & Medical	37	34	32	31	25	--	--	--
Engineering	42	40	36	32	27	--	--	--
Economics	44	43	39	36	30	--	--	--
AA-Briefcase v1.1	1575	1524	1440	1369	1114	--	--	--
AutomationBench-AA	35.4%	36.0%	33.7%	28.6%	22.9%	--	--	--
Terminal-Bench 4.0	32.8%	29.3%	21.7%	15.2%	12.6%	--	--	--
FrontierCode 2.0	34.9%	29.9%	23.2%	16.1%	8.0%	--	--	--
AA-Omniscience v1.1	12	8	5	4	2	--	--	--
GDP.pdf	20.8%	18.2%	17.2%	15.2%	11.2%	--	--	--
HLE-Diamond	29.6%	28.8%	23.7%	16.8%	14.1%	--	--	--
CritPt v2 (Hard Subset)	41.0%	44.5%	42.5%	30.0%	21.5%	--	--	--
Terminal-Bench-Science 0.1	20.0%	18.1%	10.0%	7.1%	1.9%	--	--	--

Cost per TaskUSD	$0.41	$0.25	$0.16	$0.09	$0.04	--	--	--
Input PriceUSD/1M Tokens	$0.10	$0.10	$0.10	$0.10	$0.10	--	--	--
Output PriceUSD/1M Tokens	$0.50	$0.50	$0.50	$0.50	$0.50	--	--	--
Cache Hit PriceUSD/1M Tokens	$0.01	$0.01	$0.01	$0.01	$0.01	--	--	--
Cache Write PriceUSD/1M Tokens	$0.125	$0.125	$0.125	$0.125	$0.125	--	--	--

Output SpeedTokens/s	241	196	187	175	185	--	--	--
Time to First Tokens	310.72	67.20	24.31	10.36	7.51	--	--	--
Time to First Answer Tokens	310.72	67.20	24.31	10.36	7.51	--	--	--
End-to-End Response Times	312.80	69.75	26.99	13.21	10.22	--	--	--
Time per Tasks	593.47	441.28	298.26	192.95	97.99	--	--	--

Context Window	1M	1M	1M	1M	1M	512k	512k	512k
Creator	Anthropic	Anthropic	Anthropic	Anthropic	Anthropic	Institute of Foundation Models	Institute of Foundation Models	Institute of Foundation Models
License	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Open	Open	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	Supports: text	Supports: text
Output Modality	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text
Providers						--	--	--

Updated

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

IntelligenceUpdated

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index v5.0 incorporates 9 evaluations: AA-Briefcase v1.1, AutomationBench-AA, Terminal-Bench 4.0, FrontierCode 2.0, AA-Omniscience v1.1, GDP.pdf, HLE-Diamond, CritPt v2 (Hard Subset), and Terminal-Bench-Science 0.1

Artificial Analysis Intelligence Index v5.0 includes: AA-Briefcase v1.1, AutomationBench-AA, Terminal-Bench 4.0, FrontierCode 2.0, AA-Omniscience v1.1, GDP.pdf, HLE-Diamond, CritPt v2 (Hard Subset), Terminal-Bench-Science 0.1. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

Intelligence Index vs. Cost per Task

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

Most attractive quadrant

Claude Haiku 5.5

Pareto line

AA-Briefcase v1.1

AutomationBench-AA

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 5 evaluations: AA-Briefcase v1.1, AA-Omniscience v1.1, HLE-Diamond, AutomationBench-AA, GDP.pdf · Higher is better

Strategy & Ops Index

Incorporates 4 evaluations: AutomationBench-AA, AA-Briefcase v1.1, AA-Omniscience v1.1, GDP.pdf · Higher is better

Legal Index

Incorporates 5 evaluations: AA-Omniscience v1.1, AA-Briefcase v1.1, HLE-Diamond, GDP.pdf, AutomationBench-AA · Higher is better

Healthcare & Medical Index

Incorporates 5 evaluations: AA-Omniscience v1.1, AA-Briefcase v1.1, MLCR-AA, AutomationBench-AA, HLE-Diamond · Higher is better

Engineering Index

Incorporates 7 evaluations: AA-Omniscience v1.1, CritPt v2 (Hard Subset), Terminal-Bench-Science 0.1, HLE-Diamond, Terminal-Bench 4.0, FrontierCode 2.0, AA-Briefcase v1.1 · Higher is better

Economics Index

Incorporates 4 evaluations: AA-Briefcase v1.1, AA-Omniscience v1.1, HLE-Diamond, GDP.pdf · Higher is better

Benchmarks

AA-PersonalityBenchNew

Personality Indexes

Each axis is one of 8 personality indexes: the mean of its traits’ Elo z-scores, percentile ranked from 1 to 100 across all models evaluated in the benchmark

Claude Haiku 5.5 vs K2-V2: Release Comparison

Intelligence

Speed

Cost per Task

IntelligenceUpdated

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index

Intelligence Index vs. Cost per 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

Benchmarks

AA-PersonalityBenchNew

Personality Indexes