GPT-6.1 Sol vs GPT-5.6 Terra: Release Comparison

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

Comparison of the GPT-6.1 Sol and GPT-5.6 Terra 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, GPT-6.1 Sol scores highest: GPT-6.1 Sol (Max) at 52, against GPT-5.6 Terra (Max) at 42 for GPT-5.6 Terra.
For output speed, GPT-5.6 Terra is fastest: GPT-5.6 Terra (Max) at 135 t/s, against GPT-6.1 Sol (Max) at 55 t/s for GPT-6.1 Sol.
For cost per task, GPT-6.1 Sol is cheapest: GPT-6.1 Sol (Low) at $0.13, against GPT-5.6 Terra (Non-reasoning) at $0.14 for GPT-5.6 Terra.

Model Playground

Releases compared


	GPT-6.1 Sol (max)	GPT-6.1 Sol (xhigh)	GPT-6.1 Sol (high)	GPT-6.1 Sol (medium)	GPT-6.1 Sol (low)	GPT-5.6 Terra (max)	GPT-5.6 Terra (xhigh)	GPT-5.6 Terra (high)	GPT-5.6 Terra (medium)	GPT-5.6 Terra (low)	GPT-5.6 Terra (non-reasoning)
Intelligence Index	52	51	50	48	42	42	38	34	30	27	21
Finance & Accounting	54	53	53	50	45	41	40	37	32	30	21
Strategy & Ops	57	56	55	53	46	47	44	40	34	31	23
Legal	58	57	56	54	50	41	40	37	34	31	22
Healthcare & Medical	51	--	--	--	--	40	38	34	31	27	--
Engineering	54	53	52	50	44	43	38	34	31	28	21
Economics	59	58	58	56	52	45	44	42	37	34	24
AA-Briefcase v1.1	1557	1504	1465	1361	1117	1334	1333	1202	1039	1014	948
GDPval-AA v2.1	1594	1538	1511	1450	1315	1452	1447	1376	1265	1109	1098
AutomationBench-AA	64.9%	66.6%	64.5%	62.6%	52.6%	59.6%	47.1%	42.0%	33.5%	29.1%	12.5%
Terminal-Bench 4.0	56.1%	54.0%	51.5%	48.0%	30.8%	35.4%	10.1%	1.5%	1.0%	1.5%	0.5%
SciCode	54.2%	55.7%	55.8%	53.2%	53.2%	55.0%	52.3%	52.4%	50.5%	49.9%	45.1%
Humanity's Last Exam	52.9%	52.6%	51.4%	49.9%	47.4%	42.9%	41.9%	38.5%	33.3%	29.2%	11.4%
GDP.pdf	31.0%	31.8%	32.0%	30.0%	27.0%	24.0%	24.6%	20.8%	17.0%	17.6%	11.2%
CritPt	31.7%	31.7%	30.0%	27.7%	24.9%	30.0%	27.1%	22.9%	17.4%	9.4%	2.0%
AA-Omniscience	42	41	41	40	38	0	−3	−3	−5	−7	−23
AA-LCR v1.1	83.0%	79.7%	82.3%	83.3%	84.0%	83.0%	79.0%	77.7%	74.0%	71.3%	58.7%

Cost per TaskUSD	$0.72	$0.39	$0.32	$0.21	$0.13	$1.40	$0.63	$0.34	$0.18	$0.14	$0.14
Input PriceUSD/1M Tokens	$2.00	$2.00	$2.00	$2.00	$2.00	$2.00	$2.00	$2.00	$2.00	$2.00	$2.00
Output PriceUSD/1M Tokens	$10.00	$10.00	$10.00	$10.00	$10.00	$12.00	$12.00	$12.00	$12.00	$12.00	$12.00
Cache Hit PriceUSD/1M Tokens	$0.10	$0.10	$0.10	$0.10	$0.10	$0.20	$0.20	$0.20	$0.20	$0.20	$0.20
Cache Write PriceUSD/1M Tokens	$2.50	$2.50	$2.50	$2.50	$2.50	$2.50	$2.50	$2.50	$2.50	$2.50	$2.50

Output SpeedTokens/s	55	52	48	44	43	135	119	117	115	111	112
Time to First Tokens	239.97	133.08	40.09	4.12	2.80	131.76	13.87	2.36	1.41	1.41	0.76
Time to First Answer Tokens	239.97	133.08	40.09	4.12	2.80	131.76	13.87	2.36	1.41	1.41	0.76
End-to-End Response Times	249.02	142.75	50.55	15.54	14.42	135.47	18.07	6.64	5.78	5.93	5.23
Time per Tasks	687.68	337.39	266.05	183.98	91.58	286.19	166.99	97.18	46.69	34.16	27.87

Context Window	1M	1M	1M	1M	1M	1M	1M	1M	1M	1M	1M
Creator	OpenAI	OpenAI	OpenAI	OpenAI	OpenAI	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

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 Sol

GPT-5.6 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

AA-PersonalityBenchNew

Model AvsModel B

AA-PersonalityBench results are not available for GPT-5.6 Terra

GPT-6.1 Sol vs GPT-5.6 Terra: 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