GPT-6.1 Terra vs Claude Sonnet 5.5: 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 Claude Sonnet 5.5 releases: 6 and 5 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 54, against GPT-6.1 Terra (Max) at 51 for GPT-6.1 Terra.
For output speed, Claude Sonnet 5.5 is fastest: Claude Sonnet 5.5 (Max, Default Fallback) at 139 t/s, against GPT-6.1 Terra (Max) at 111 t/s for GPT-6.1 Terra.
For cost per task, GPT-6.1 Terra is cheapest: GPT-6.1 Terra (Low) at $0.07, 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 with fallback)	GPT-6.1 Terra (max)	Claude Sonnet 5.5 (xhigh with fallback)	GPT-6.1 Terra (xhigh)	GPT-6.1 Terra (high)	Claude Sonnet 5.5 (high with fallback)	GPT-6.1 Terra (medium)	GPT-6.1 Terra (non-reasoning)	Claude Sonnet 5.5 (medium with fallback)	GPT-6.1 Terra (low)	Claude Sonnet 5.5 (low with fallback)
Intelligence Index	54	51	50	45	42	41	38	30	30	29	25
Finance & Accounting	56	49	49	48	44	44	42	34	41	38	36
Strategy & Ops	58	50	54	49	47	51	45	40	47	42	42
Legal	52	46	47	44	42	44	40	28	39	37	37
Healthcare & Medical	54	45	47	--	--	44	--	--	40	--	37
Engineering	58	54	53	49	46	46	43	33	37	35	33
Economics	56	49	50	47	44	46	41	33	41	36	36
AA-Briefcase v1.1	1814	1402	1744	1333	1264	1635	1191	1228	1440	1030	1268
AutomationBench-AA	71.8%	60.2%	65.5%	59.9%	58.5%	59.4%	57.8%	51.0%	54.9%	56.2%	49.4%
Terminal-Bench 4.0	63.6%	55.6%	57.1%	46.5%	41.9%	43.9%	32.3%	26.8%	29.8%	15.2%	20.7%
FrontierCode 2.0	41.7%	42.3%	35.6%	36.9%	37.5%	25.7%	34.5%	33.4%	11.0%	24.5%	7.1%
AA-Omniscience v1.1	30	30	21	29	28	19	27	−5	19	23	20
GDP.pdf	25.8%	28.6%	24.6%	26.6%	28.0%	25.2%	28.4%	23.2%	20.2%	25.6%	16.0%
HLE-Diamond	53.3%	47.3%	44.1%	42.3%	35.4%	33.8%	31.3%	14.5%	23.8%	24.9%	20.6%
CritPt v2 (Hard Subset)	56.0%	64.5%	54.0%	57.5%	60.5%	47.5%	56.0%	32.5%	28.5%	48.5%	22.5%
Terminal-Bench-Science 0.1	53.3%	57.6%	52.4%	41.9%	33.3%	34.3%	24.8%	24.3%	16.2%	7.6%	10.5%

Cost per TaskUSD	$10.02	$0.96	$4.09	$0.40	$0.26	$1.64	$0.17	$0.23	$0.78	$0.07	$0.51
Input PriceUSD/1M Tokens	$2.00	$1.00	$2.00	$1.00	$1.00	$2.00	$1.00	$1.00	$2.00	$1.00	$2.00
Output PriceUSD/1M Tokens	$10.00	$5.00	$10.00	$5.00	$5.00	$10.00	$5.00	$5.00	$10.00	$5.00	$10.00
Cache Hit PriceUSD/1M Tokens	$0.10	$0.05	$0.10	$0.05	$0.05	$0.10	$0.05	$0.05	$0.10	$0.05	$0.10
Cache Write PriceUSD/1M Tokens	$2.50	$1.25	$2.50	$1.25	$1.25	$2.50	$1.25	$1.25	$2.50	$1.25	$2.50

Output SpeedTokens/s	139	111	107	104	94	108	91	91	101	91	106
Time to First Tokens	456.04	275.16	35.72	68.41	20.70	13.94	4.24	0.93	1.15	1.52	1.20
Time to First Answer Tokens	456.04	275.16	35.72	68.41	20.70	13.94	4.24	0.93	1.15	1.52	1.20
End-to-End Response Times	459.65	279.68	40.38	73.21	26.02	18.57	9.74	6.42	6.08	7.02	5.93
Time per Tasks	1,262.87	532.70	719.23	248.26	171.62	343.51	118.24	104.11	190.36	48.24	127.17

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

Speed

Output tokens per second · Higher 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 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 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

GPT-6.1 Terra

Claude Sonnet 5.5

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

Output Speed

Output tokens per second · Higher is better

No publicly available API

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 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-Briefcase v1.1, AA-Omniscience v1.1, HLE-Diamond, GDP.pdf · 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 Claude Sonnet 5.5: Release Comparison

Intelligence

Speed

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

Output Speed

Output Speed

Model Performance Representation

Capability Scores

Capability Indexes

Benchmarks

AA-PersonalityBenchNew

Personality Indexes