Claude Opus 5.5 vs JT-4.1 Flash 236B A21B: Release Comparison

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

Comparison of the Claude Opus 5.5 and JT-4.1 Flash 236B A21B 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 Opus 5.5 scores highest: Claude Opus 5.5 (Max, Default Fallback) at 58, against JT-4.1 Flash 236B A21B (Reasoning) at 34 for JT-4.1 Flash 236B A21B.

Model Playground

Releases compared


	Claude Opus 5.5 (max with fallback)	Claude Opus 5.5 (xhigh with fallback)	Claude Opus 5.5 (high with fallback)	Claude Opus 5.5 (medium with fallback)	Claude Opus 5.5 (low with fallback)	JT-4.1 Flash 236B A21B	JT-4.1 Flash 236B A21B (non-reasoning)
Intelligence Index	58	56	54	51	42	34	27*
Finance & Accounting	61	58	56	54	46	40	--
Strategy & Ops	64	62	59	57	48	41	--
Legal	63	61	59	57	52	44	--
Healthcare & Medical	61	--	--	--	--	--	--
Engineering	60	59	56	54	45	36	--
Economics	66	63	61	60	53	47	--
AA-Briefcase v1.1	1803	1764	1686	1625	1280	1089	--
GDPval-AA v2.1	1866	1831	1704	1584	1235	1324	1123
AutomationBench-AA	69.5%	65.0%	63.2%	61.2%	52.9%	46.5%	--
Terminal-Bench 4.0	59.6%	59.6%	56.6%	52.5%	31.3%	3.0%	--
SciCode	66.9%	65.0%	60.4%	59.3%	58.6%	52.0%	--
Humanity's Last Exam	61.4%	57.5%	55.6%	54.7%	48.3%	43.6%	17.8%
GDP.pdf	26.2%	26.6%	28.8%	25.6%	25.6%	8.6%	--
CritPt	31.7%	31.7%	30.9%	27.7%	17.7%	14.0%	0.0%
AA-Omniscience	46	43	41	40	39	21	−9
AA-LCR v1.1	84.7%	84.7%	82.7%	84.3%	80.7%	78.3%	71.3%

Cost per TaskUSD	$5.98	$3.46	$1.82	$1.34	$0.55	--	--
Input PriceUSD/1M Tokens	$4.00	$4.00	$4.00	$4.00	$4.00	--	--
Output PriceUSD/1M Tokens	$20.00	$20.00	$20.00	$20.00	$20.00	--	--
Cache Hit PriceUSD/1M Tokens	$0.20	$0.20	$0.20	$0.20	$0.20	--	--
Cache Write PriceUSD/1M Tokens	$5.00	$5.00	$5.00	$5.00	$5.00	--	--

Output SpeedTokens/s	95	84	82	81	79	--	--
Time to First Tokens	573.15	113.72	34.50	23.06	6.52	--	--
Time to First Answer Tokens	573.15	113.72	34.50	23.06	6.52	--	--
End-to-End Response Times	578.41	119.67	40.63	29.20	12.81	--	--
Time per Tasks	799.71	492.09	270.97	198.80	77.86	--	--

Context Window	1M	1M	1M	1M	1M	262k	262k
Creator	Anthropic	Anthropic	Anthropic	Anthropic	Anthropic	China Mobile	China Mobile
License	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary
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						--	--

* 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 Task

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

Most attractive quadrant

Claude Opus 5.5

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

AA-PersonalityBenchNew

Model AvsModel B

AA-PersonalityBench results are not available for JT-4.1 Flash 236B A21B

Claude Opus 5.5 vs JT-4.1 Flash 236B A21B: Release Comparison

Intelligence

Speed

Cost per Task

Intelligence

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

AA-PersonalityBenchNew