GPT-6 Astra 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 Astra 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, GPT-6 Astra scores highest: GPT-6 Astra (Max) at 57, against Gemini 3.8 Flash (High) at 31 for Gemini 3.8 Flash.
For output speed, Gemini 3.8 Flash is fastest: Gemini 3.8 Flash (High) at 130 t/s, against GPT-6 Astra (Max) at 67 t/s for GPT-6 Astra.
For cost per task, GPT-6 Astra is cheapest: GPT-6 Astra (Low) at $1.42, against Gemini 3.8 Flash (Medium) at $6.26 for Gemini 3.8 Flash.

Model Playground

Releases compared


	GPT-6 Astra (max)	GPT-6 Astra (xhigh)	GPT-6 Astra (high)	GPT-6 Astra (medium)	GPT-6 Astra (low)	Gemini 3.8 Flash (high)	Gemini 3.8 Flash (medium)	Gemini 3.8 Flash (low)
Intelligence Index	57	55	55	52	43	31	30	23
Finance & Accounting	57	57	56	54	48	42	42	34
Strategy & Ops	58	58	57	56	50	47	47	35
Legal	56	56	55	52	48	42	42	33
Healthcare & Medical	54	53	52	50	45	38	38	31
Engineering	62	60	60	57	50	39	37	31
Economics	58	58	57	54	48	41	40	34
AA-Briefcase v1.1	1569	1543	1505	1460	1256	1203	1183	1061
AutomationBench-AA	68.5%	67.2%	66.6%	64.6%	59.1%	59.9%	60.9%	36.5%
Terminal-Bench 4.0	59.1%	59.6%	54.0%	49.5%	41.9%	19.7%	19.7%	10.1%
FrontierCode 2.0	42.4%	41.4%	40.1%	36.6%	26.2%	18.7%	16.5%	8.1%
AA-Omniscience v1.1	42	44	45	41	40	23	24	13
GDP.pdf	31.0%	32.2%	31.0%	30.4%	30.4%	21.0%	22.8%	18.6%
HLE-Diamond	63.8%	61.5%	59.3%	52.7%	45.1%	33.1%	29.1%	24.3%
CritPt v2 (Hard Subset)	70.5%	71.0%	71.5%	72.0%	63.0%	46.5%	45.0%	33.5%
Terminal-Bench-Science 0.1	63.3%	54.8%	59.5%	53.3%	37.1%	10.0%	10.5%	8.1%

Cost per TaskUSD	$6.24	$3.66	$3.24	$2.73	$1.42	$7.77	$6.26	--
Input PriceUSD/1M Tokens	$10.00	$10.00	$10.00	$10.00	$10.00	$0.75	$0.75	$0.75
Output PriceUSD/1M Tokens	$50.00	$50.00	$50.00	$50.00	$50.00	$3.75	$3.75	$3.75
Cache Hit PriceUSD/1M Tokens	$1.00	$1.00	$1.00	$1.00	$1.00	$0.075	$0.075	$0.075
Cache Write PriceUSD/1M Tokens	$12.50	$12.50	$12.50	$12.50	$12.50	$0.75	$0.75	$0.75

Output SpeedTokens/s	67	60	56	51	50	130	--	--
Time to First Tokens	316.24	196.11	100.65	7.30	2.37	25.27	--	--
Time to First Answer Tokens	316.24	196.11	100.65	7.30	2.37	25.27	--	--
End-to-End Response Times	323.74	204.50	109.55	17.17	12.31	29.11	--	--
Time per Tasks	768.13	449.93	403.94	352.36	180.75	754.75	--	--

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

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 v5.0.1 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 v5.0.1 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 Astra

Gemini 3.8 Flash

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

Model AvsModel B

AA-PersonalityBench: Expressiveness Index, GPT-6 Astra (max) vs Gemini 3.8 Flash (high)

Chance each model’s answer is judged to show more of each trait from their Elo gap · 50% is an even match

GPT-6 Astra (max)

Gemini 3.8 Flash (high)

Metaphorical

98%

Natural Sounding

88%

12%

Eloquent

17%

83%

Lexically Varied

23%

77%

Literate

66%

34%

GPT-6 Astra vs Gemini 3.8 Flash: 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

AA-PersonalityBench: Expressiveness Index, GPT-6 Astra (max) vs Gemini 3.8 Flash (high)