GPT-6 Luna vs Gemini 3.8 Flash: Release Comparison

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

Comparison of the GPT-6 Luna and Gemini 3.8 Flash releases: 6 and 3 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 9 models.

For intelligence, Gemini 3.8 Flash scores highest: Gemini 3.8 Flash (High) at 41, against GPT-6 Luna (Max) at 38 for GPT-6 Luna.
For output speed, GPT-6 Luna is fastest: GPT-6 Luna (Low) at 142 t/s, against Gemini 3.8 Flash (High) at 131 t/s for Gemini 3.8 Flash.
For cost per task, GPT-6 Luna is cheapest: GPT-6 Luna (Low) at $0.0045, against Gemini 3.8 Flash (Medium) at $0.93 for Gemini 3.8 Flash.

Model Playground

Releases compared


	Gemini 3.8 Flash (high)	Gemini 3.8 Flash (medium)	GPT-6 Luna (max)	GPT-6 Luna (xhigh)	Gemini 3.8 Flash (low)	GPT-6 Luna (high)	GPT-6 Luna (medium)	GPT-6 Luna (low)	GPT-6 Luna (non-reasoning)
Intelligence Index	41	40	38	35	33	33	30	22	18
Finance & Accounting	47	45	40	37	39	36	33	24	20
Strategy & Ops	48	48	46	43	39	41	37	23	20
Legal	52	51	40	37	45	35	33	25	19
Healthcare & Medical	42	--	37	--	--	--	--	--	--
Engineering	43	40	37	34	34	32	29	23	21
Economics	52	50	45	42	46	40	37	30	24
AA-Briefcase v1.1	1203	1181	1336	1237	1062	1186	1099	741	903
GDPval-AA v2.1	1436	1422	1432	1364	1307	1340	1262	1033	1045
AutomationBench-AA	59.9%	60.9%	53.2%	47.8%	36.5%	47.8%	40.5%	12.0%	9.1%
Terminal-Bench 4.0	19.7%	19.7%	12.6%	8.1%	10.1%	4.5%	2.5%	0.0%	1.5%
SciCode	56.6%	55.1%	54.6%	51.7%	55.0%	50.3%	50.9%	46.9%	43.1%
Humanity's Last Exam	47.8%	42.1%	38.5%	34.3%	37.1%	32.9%	28.3%	20.3%	8.6%
GDP.pdf	21.0%	22.8%	22.8%	18.6%	18.6%	18.2%	13.8%	9.0%	5.8%
CritPt	18.3%	12.3%	19.4%	17.4%	4.0%	15.4%	10.6%	2.6%	1.1%
AA-Omniscience	30	29	1	−2	21	−6	−5	−9	−22
AA-LCR v1.1	81.3%	84.0%	83.3%	80.0%	80.7%	79.3%	78.3%	74.0%	39.7%

Cost per TaskUSD	$1.24	$0.93	$0.07	$0.04	--	$0.03	$0.02	$0.0045	$0.01
Input PriceUSD/1M Tokens	$0.75	$0.75	$0.10	$0.10	$0.75	$0.10	$0.10	$0.10	$0.10
Output PriceUSD/1M Tokens	$3.75	$3.75	$0.50	$0.50	$3.75	$0.50	$0.50	$0.50	$0.50
Cache Hit PriceUSD/1M Tokens	$0.075	$0.075	$0.01	$0.01	$0.075	$0.01	$0.01	$0.01	$0.01
Cache Write PriceUSD/1M Tokens	$0.75	$0.75	$0.125	$0.125	$0.75	$0.125	$0.125	$0.125	$0.125

Output SpeedTokens/s	131	--	139	130	--	135	--	142	118
Time to First Tokens	21.42	--	102.41	34.27	--	20.44	--	2.55	0.79
Time to First Answer Tokens	21.42	--	102.41	34.27	--	20.44	--	2.55	0.79
End-to-End Response Times	25.22	--	106.00	38.11	--	24.14	--	6.06	5.01
Time per Tasks	509.43	--	354.96	208.70	--	146.96	--	14.75	31.62

Context Window	1M	1M	1M	1M	1M	1M	1M	1M	1M
Creator	Google	Google	OpenAI	OpenAI	Google	OpenAI	OpenAI	OpenAI	OpenAI
License	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary
Input Modality	Supports: text, image, speech, and video	Supports: text, image, speech, and video	Supports: text and image	Supports: text and image	Supports: text, image, speech, and video	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
Providers

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

GPT-6 Luna

Gemini 3.8 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: 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

GPT-6 Luna vs Gemini 3.8 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