Claude Sonnet 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 Sonnet 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 Sonnet 5.5 scores highest: Claude Sonnet 5.5 (Max, Default Fallback) at 55, 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 Sonnet 5.5 (Low, Default Fallback) at 2.6 min for Claude Sonnet 5.5.
For cost per task, GPT-6 Luna is cheapest: GPT-6 Luna (Low) at $0.01, against Claude Sonnet 5.5 (Low, Default Fallback) at $0.51 for Claude Sonnet 5.5.

Model Playground

Releases compared


	Claude Sonnet 5.5 (max)	Claude Sonnet 5.5 (xhigh)	Claude Sonnet 5.5 (high)	Claude Sonnet 5.5 (medium)	GPT-6 Luna (max)	Claude Sonnet 5.5 (low)	GPT-6 Luna (xhigh)	GPT-6 Luna (high)	GPT-6 Luna (medium)	GPT-6 Luna (low)	GPT-6 Luna (non-reasoning)
Intelligence Index	55	50	42	31	28	26	23	21	18	10	9
Finance & Accounting	56	49	44	41	34	36	31	29	26	17	19
Strategy & Ops	58	54	51	47	43	42	39	38	34	17	17
Legal	52	47	44	39	32	37	28	27	24	16	17
Healthcare & Medical	54	47	44	40	35	37	30	29	27	16	16
Engineering	58	54	46	37	33	33	29	27	25	19	17
Economics	54	48	45	39	35	35	31	29	27	19	19
AA-Briefcase v1.1	1813	1742	1634	1439	1337	1268	1235	1187	1096	740	903
AutomationBench-AA	71.8%	65.5%	59.4%	54.9%	53.2%	49.4%	47.8%	47.8%	40.5%	12.0%	9.1%
Terminal-Bench 4.0	63.6%	57.1%	43.9%	29.8%	12.6%	20.7%	8.1%	4.5%	2.5%	0.0%	1.5%
FrontierCode 2.0	41.7%	35.6%	25.7%	11.0%	25.2%	7.1%	18.4%	18.6%	12.8%	2.2%	1.6%
AA-Omniscience v1.1	30	21	19	19	−8	20	−13	−13	−14	−18	−26
GDP.pdf	25.8%	24.6%	25.2%	20.2%	22.8%	16.0%	18.6%	18.2%	13.8%	9.0%	5.8%
HLE-Diamond	53.3%	44.1%	33.8%	23.8%	22.2%	20.6%	18.9%	15.6%	15.1%	10.2%	6.3%
CritPt v2 (Hard Subset)	59.0%	57.5%	51.5%	33.5%	42.5%	26.0%	37.0%	31.0%	27.5%	9.5%	5.0%
Terminal-Bench-Science 0.1	53.3%	52.4%	34.3%	16.2%	8.6%	10.5%	5.2%	2.9%	1.4%	1.0%	1.0%

Cost per TaskUSD	$10.02	$4.09	$1.64	$0.78	$0.15	$0.51	$0.10	$0.07	$0.04	$0.01	$0.07
Input PriceUSD/1M Tokens	$2.00	$2.00	$2.00	$2.00	$0.10	$2.00	$0.10	$0.10	$0.10	$0.10	$0.10
Output PriceUSD/1M Tokens	$10.00	$10.00	$10.00	$10.00	$0.50	$10.00	$0.50	$0.50	$0.50	$0.50	$0.50
Cache Hit PriceUSD/1M Tokens	$0.10	$0.10	$0.10	$0.10	$0.01	$0.10	$0.01	$0.01	$0.01	$0.01	$0.01
Cache Write PriceUSD/1M Tokens	$2.50	$2.50	$2.50	$2.50	$0.13	$2.50	$0.13	$0.13	$0.13	$0.13	$0.13

Time per TaskMinutes	31.5	15.2	7.2	3.7	12.3	2.6	7.2	5.6	3.4	0.6	2.1
Output Speedtok/s	151	134	136	139	102	133	101	97	97	88	82
Time to First Answer Tokens	307.65	27.50	9.34	4.21	93.00	2.35	23.09	11.75	5.41	2.50	1.16
Time to First Tokens	307.65	27.50	9.34	4.21	93.00	2.35	23.09	11.75	5.41	2.50	1.16
End-to-End TimeMean of Single-Request Workloads (s)	607.46	74.65	40.76	25.97	193.24	21.41	58.72	35.56	23.24	21.57	17.75

Context Window	1M	1M	1M	1M	1M	1M	1M	1M	1M	1M	1M
Creator	Anthropic	Anthropic	Anthropic	Anthropic	OpenAI	Anthropic	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 2.0, AA-Omniscience v1.1, GDP.pdf, HLE-Diamond, CritPt v2 (Hard Subset), and Terminal-Bench-Science 0.1

No publicly available API

Artificial Analysis Intelligence Index v5.0.1 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 Sonnet 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

No publicly available API

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

No publicly available API

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 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 Sonnet 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 Sonnet 5.5 (max)

GPT-6 Luna (max)

Lexically Varied

95%

Metaphorical

93%

Natural Sounding

24%

76%

Eloquent

72%

28%

Literate

62%

38%

Claude Sonnet 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 Sonnet 5.5 (max) vs GPT-6 Luna (max)