GPT-6.1 Terra 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-6.1 Terra 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, GPT-6.1 Terra scores highest: GPT-6.1 Terra (Max) at 48, against Gemini 3.8 Flash (High) at 41 for Gemini 3.8 Flash.
For cost per task, GPT-6.1 Terra is cheapest: GPT-6.1 Terra (Low) at $0.05, against Gemini 3.8 Flash (High) at $3.49 for Gemini 3.8 Flash.

Model Playground

Releases compared


	GPT-6.1 Terra (max)	GPT-6.1 Terra (xhigh)	GPT-6.1 Terra (high)	GPT-6.1 Terra (medium)	Gemini 3.8 Flash (high)	Gemini 3.8 Flash (medium)	GPT-6.1 Terra (low)	GPT-6.1 Terra (non-reasoning)	Gemini 3.8 Flash (low)
Intelligence Index	48	45	44	41	41	40	36	33	33
Finance & Accounting	47	46	44	43	47	45	38	36	39
Strategy & Ops	50	48	47	45	48	48	42	42	39
Legal	49	48	47	46	52	51	42	35	45
Healthcare & Medical	--	--	--	--	40	40	--	--	34
Engineering	49	46	45	42	43	40	35	32	34
Economics	54	52	51	49	52	50	44	38	46
AA-Briefcase v1.1	1402	1329	1264	1192	1202	1181	1030	1229	1061
GDPval-AA v2.1	1468	1403	1342	1316	1436	1423	1199	1282	1307
AutomationBench-AA	60.2%	59.9%	58.5%	57.8%	59.9%	60.9%	56.2%	51.0%	36.5%
Terminal-Bench 4.0	55.6%	46.5%	41.9%	32.3%	19.7%	19.7%	15.2%	26.8%	10.1%
SciCode	55.1%	53.4%	51.6%	51.6%	56.6%	55.1%	52.4%	47.8%	55.0%
Humanity's Last Exam	46.2%	43.7%	43.3%	40.2%	47.8%	42.1%	35.8%	21.1%	37.1%
GDP.pdf	28.6%	26.6%	28.0%	28.4%	21.0%	22.8%	25.6%	23.2%	18.6%
CritPt	28.0%	26.6%	25.7%	21.4%	18.3%	12.3%	15.1%	4.9%	4.0%
AA-Omniscience	30	29	28	27	30	29	24	4	21
AA-LCR v1.1	82.7%	81.7%	82.3%	80.7%	81.3%	84.0%	81.0%	67.7%	80.7%

Cost per TaskUSD	$0.40	$0.19	$0.13	$0.10	$3.49	--	$0.05	$0.11	--
Input PriceUSD/1M Tokens	$1.00	$1.00	$1.00	$1.00	$0.75	$0.75	$1.00	$1.00	$0.75
Output PriceUSD/1M Tokens	$5.00	$5.00	$5.00	$5.00	$3.75	$3.75	$5.00	$5.00	$3.75
Cache Hit PriceUSD/1M Tokens	$0.05	$0.05	$0.05	$0.05	$0.075	$0.075	$0.05	$0.05	$0.075
Cache Write PriceUSD/1M Tokens	$1.25	$1.25	$1.25	$1.25	$0.75	$0.75	$1.25	$1.25	$0.75

Output SpeedTokens/s	--	--	--	--	134	--	--	--	--
Time to First Tokens	--	--	--	--	28.78	--	--	--	--
Time to First Answer Tokens	--	--	--	--	28.78	--	--	--	--
End-to-End Response Times	--	--	--	--	32.52	--	--	--	--
Time per Tasks	--	--	--	--	531.00	--	--	--	--

Context Window	1M	1M	1M	1M	1M	1M	1M	1M	1M
Creator	OpenAI	OpenAI	OpenAI	OpenAI	Google	Google	OpenAI	OpenAI	Google
License	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, image, speech, and video	Supports: text, image, speech, and video	Supports: text and image	Supports: text and image	Supports: text, image, speech, and video
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 Task

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

Most attractive quadrant

GPT-6.1 Terra

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

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

GPT-6.1 Terra 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 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