Claude Opus 5.5 vs GPT-6 Luna: 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 GPT-6 Luna releases: 5 and 6 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 11 models.

For intelligence, Claude Opus 5.5 scores highest: Claude Opus 5.5 (Max, Default Fallback) at 59, against GPT-6 Luna (Max) at 28 for GPT-6 Luna.
For time per task, GPT-6 Luna is fastest: GPT-6 Luna (Low) at 0.6 min, against Claude Opus 5.5 (Low, Default Fallback) at 3.0 min for Claude Opus 5.5.
For cost per task, GPT-6 Luna is cheapest: GPT-6 Luna (Low) at $0.0051, against Claude Opus 5.5 (Low, Default Fallback) at $0.98 for Claude Opus 5.5.

Model Playground

Releases compared


	Claude Opus 5.5 (max)	Claude Opus 5.5 (xhigh)	Claude Opus 5.5 (high)	Claude Opus 5.5 (medium)	Claude Opus 5.5 (low)	GPT-6 Luna (max)	GPT-6 Luna (xhigh)	GPT-6 Luna (high)	GPT-6 Luna (medium)	GPT-6 Luna (low)	GPT-6 Luna (non-reasoning)
Intelligence Index	59	57	52	48	35	28	23	21	18	10	9
Finance & Accounting	59	56	53	51	42	34	31	29	26	17	19
Strategy & Ops	61	59	58	56	48	43	39	38	34	17	17
Legal	58	55	52	50	43	32	28	27	24	16	17
Healthcare & Medical	58	56	52	51	45	35	30	29	27	16	16
Engineering	65	63	58	54	43	33	29	27	25	19	17
Economics	60	58	55	53	44	35	31	29	27	19	19
AA-Briefcase v1.1	1801	1761	1682	1617	1278	1337	1235	1186	1096	740	903
AutomationBench-AA	69.5%	65.0%	63.2%	61.2%	52.9%	53.2%	47.8%	47.8%	40.5%	12.0%	9.1%
Terminal-Bench 4.0	59.6%	59.6%	56.6%	52.5%	31.3%	12.6%	8.1%	4.5%	2.5%	0.0%	1.5%
FrontierCode-AA 2.0	46.4%	43.8%	35.9%	33.1%	15.8%	25.2%	18.4%	18.6%	12.8%	2.2%	1.6%
AA-Omniscience v1.1	48	43	42	40	39	−8	−13	−13	−14	−18	−26
GDP.pdf	26.2%	26.6%	28.8%	25.6%	25.6%	22.8%	18.6%	18.2%	13.8%	9.0%	5.8%
HLE-Diamond	67.9%	64.0%	55.6%	51.4%	41.7%	22.2%	18.9%	15.6%	15.1%	10.2%	6.3%
CritPt v2 (Hard Subset)	68.0%	67.5%	59.5%	54.0%	36.0%	42.5%	37.0%	31.0%	27.5%	9.5%	5.0%
Terminal-Bench-Science 0.1	59.0%	61.9%	49.0%	43.3%	24.3%	8.6%	5.2%	2.9%	1.4%	1.0%	1.0%

Cost per TaskUSD	$10.04	$6.05	$3.46	$2.45	$0.98	$0.15	$0.10	$0.0729	$0.0422	$0.0051	$0.0714
Input PriceUSD/1M Tokens	$4.00	$4.00	$4.00	$4.00	$4.00	$0.10	$0.10	$0.10	$0.10	$0.10	$0.10
Output PriceUSD/1M Tokens	$20.00	$20.00	$20.00	$20.00	$20.00	$0.50	$0.50	$0.50	$0.50	$0.50	$0.50
Cache Hit PriceUSD/1M Tokens	$0.20	$0.20	$0.20	$0.20	$0.20	$0.01	$0.01	$0.01	$0.01	$0.01	$0.01
Cache Write PriceUSD/1M Tokens	$5.00	$5.00	$5.00	$5.00	$5.00	$0.13	$0.13	$0.13	$0.13	$0.13	$0.13

Time per TaskMinutes	25.4	15.6	9.5	7.0	3.0	12.0	7.4	5.8	3.6	0.6	1.9
Output Speedtok/s	114	110	106	105	105	105	98	95	93	90	86
Time to First Answer Tokens	389.87	87.13	27.82	17.64	5.06	89.07	21.30	14.50	6.83	3.58	1.78
Time to First Tokens	389.87	87.13	27.82	17.64	5.06	89.07	21.30	14.50	6.83	3.58	1.78
End-to-End TimeMean of Single-Request Workloads (s)	789.42	238.19	116.15	93.28	63.84	190.83	56.70	42.39	28.11	22.71	21.96

Context Window	1M	1M	1M	1M	1M	1M	1M	1M	1M	1M	1M
Creator	Anthropic	Anthropic	Anthropic	Anthropic	Anthropic	OpenAI	OpenAI	OpenAI	OpenAI	OpenAI	OpenAI
License	Proprietary	Proprietary	Proprietary	Proprietary	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	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	Supports: text	Supports: text	Supports: text	Supports: text
Providers

Updated

Intelligence

Artificial Analysis Intelligence Index · Higher is better

Time per Task

Inference time (minutes) per Intelligence Index task · Lower 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 v5.0.1 incorporates 9 evaluations: AA-Briefcase v1.1, AutomationBench-AA, Terminal-Bench 4.0, FrontierCode-AA 2.0, AA-Omniscience v1.1, GDP.pdf, HLE-Diamond, CritPt v2 (Hard Subset), and Terminal-Bench-Science 0.1

Artificial Analysis Intelligence Index v5.0.1 includes: AA-Briefcase v1.1, AutomationBench-AA, Terminal-Bench 4.0, FrontierCode-AA 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 Opus 5.5

GPT-6 Luna

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

Time per Intelligence Index Task

Output tokens divided by end-to-end output speed (minutes per Intelligence Index task) · Speed at the model's own endpoint or the median across providers · Lower is better

The weighted average time (minutes) per Artificial Analysis Intelligence Index task: output tokens per task divided by output speed, weighted by each benchmark's weight in the Intelligence Index.

Speed and latency metrics average each endpoint's runs over the past 5 days, and the error rate pools them. We run the benchmark every 6 hours, and endpoints of deprecated models every 18 hours.

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-AA 2.0, AA-Briefcase v1.1 · Higher is better

Economics Index

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

Benchmarks

AA-PersonalityBenchNew

Model AvsModel B

AA-PersonalityBench: Expressiveness Index, Claude Opus 5.5 (max) vs GPT-6 Luna (max)

Chance each model’s answer is judged to show more of each trait from their Elo gap · 50% is an even match

Claude Opus 5.5 (max)

GPT-6 Luna (max)

Lexically Varied

99%

Metaphorical

96%

Eloquent

90%

10%

Literate

71%

29%

Natural Sounding

45%

55%

Claude Opus 5.5 vs GPT-6 Luna: Release Comparison

Intelligence

Time per Task

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

Time per Intelligence Index Task

Time per Intelligence Index Task

Time Period

Capability Scores

Capability Indexes

Benchmarks

AA-PersonalityBenchNew

AA-PersonalityBench: Expressiveness Index, Claude Opus 5.5 (max) vs GPT-6 Luna (max)