Claude Sonnet 5.5 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 Claude Sonnet 5.5 and Gemini 3.8 Flash releases: 5 and 3 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 8 models.

For intelligence, Claude Sonnet 5.5 scores highest: Claude Sonnet 5.5 (Max, Default Fallback) at 56, against Gemini 3.8 Flash (High) at 41 for Gemini 3.8 Flash.
For output speed, Gemini 3.8 Flash is fastest: Gemini 3.8 Flash (High) at 158 t/s, against Claude Sonnet 5.5 (Max, Default Fallback) at 136 t/s for Claude Sonnet 5.5.
For cost per task, Claude Sonnet 5.5 is cheapest: Claude Sonnet 5.5 (Low, Default Fallback) at $0.35, against Gemini 3.8 Flash (Medium) at $0.93 for Gemini 3.8 Flash.

Model Playground

Releases compared


	Claude Sonnet 5.5 (max with fallback)	Claude Sonnet 5.5 (xhigh with fallback)	Claude Sonnet 5.5 (high with fallback)	Gemini 3.8 Flash (high)	Claude Sonnet 5.5 (medium with fallback)	Gemini 3.8 Flash (medium)	Claude Sonnet 5.5 (low with fallback)	Gemini 3.8 Flash (low)
Intelligence Index	56	52	47	41	41	40	36	33
Finance & Accounting	57	52	47	47	41	45	38	39
Strategy & Ops	60	56	52	48	45	48	41	39
Legal	56	52	49	52	44	51	41	45
Healthcare & Medical	58	--	--	42	--	--	--	--
Engineering	58	54	48	43	42	40	38	34
Economics	61	56	52	52	47	50	44	46
AA-Briefcase v1.1	1817	1751	1636	1203	1441	1182	1272	1062
GDPval-AA v2.1	1838	1728	1549	1436	1323	1421	1175	1307
AutomationBench-AA	71.8%	65.5%	59.4%	59.9%	54.9%	60.9%	49.4%	36.5%
Terminal-Bench 4.0	63.6%	57.1%	43.9%	19.7%	29.8%	19.7%	20.7%	10.1%
SciCode	61.0%	57.3%	53.7%	56.6%	52.9%	55.1%	49.1%	55.0%
Humanity's Last Exam	55.0%	50.0%	45.8%	47.8%	39.8%	42.1%	36.2%	37.1%
GDP.pdf	25.8%	24.6%	25.2%	21.0%	20.2%	22.8%	16.0%	18.6%
CritPt	31.4%	31.1%	24.6%	18.3%	16.9%	12.3%	11.4%	4.0%
AA-Omniscience	32	24	21	30	20	29	19	21
AA-LCR v1.1	82.7%	79.7%	78.0%	81.3%	76.3%	84.0%	76.0%	80.7%

Cost per TaskUSD	$5.46	$2.01	$0.88	$1.24	$0.48	$0.93	$0.35	--
Input PriceUSD/1M Tokens	$2.00	$2.00	$2.00	$0.75	$2.00	$0.75	$2.00	$0.75
Output PriceUSD/1M Tokens	$10.00	$10.00	$10.00	$3.75	$10.00	$3.75	$10.00	$3.75
Cache Hit PriceUSD/1M Tokens	$0.10	$0.10	$0.10	$0.075	$0.10	$0.075	$0.10	$0.075
Cache Write PriceUSD/1M Tokens	$2.50	$2.50	$2.50	$0.75	$2.50	$0.75	$2.50	$0.75

Output SpeedTokens/s	136	112	110	158	110	--	109	--
Time to First Tokens	384.37	33.51	10.44	23.18	1.04	--	0.94	--
Time to First Answer Tokens	384.37	33.51	10.44	23.18	1.04	--	0.94	--
End-to-End Response Times	388.05	37.98	14.99	26.34	5.58	--	5.51	--
Time per Tasks	892.40	426.53	218.42	440.35	125.77	--	84.91	--

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

Claude Sonnet 5.5

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 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

Claude Sonnet 5.5 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