DeepSeek V4.1 Flash 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 DeepSeek V4.1 Flash and GPT-5.6 Terra releases: 2 and 6 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-5.6 Terra scores highest: GPT-5.6 Terra (Max) at 42, against DeepSeek V4.1 Flash (Max) at 39 for DeepSeek V4.1 Flash.
For output speed, DeepSeek V4.1 Flash is fastest: DeepSeek V4.1 Flash (Max) at 179 t/s, against GPT-5.6 Terra (Max) at 129 t/s for GPT-5.6 Terra.
For cost per task, GPT-5.6 Terra is cheapest: GPT-5.6 Terra (Non-reasoning) at $0.14, against DeepSeek V4.1 Flash (Non-reasoning) at $0.15 for DeepSeek V4.1 Flash.

Model Playground

Releases compared


	GPT-5.6 Terra (max)	DeepSeek V4.1 Flash (max)	GPT-5.6 Terra (xhigh)	GPT-5.6 Terra (high)	GPT-5.6 Terra (medium)	GPT-5.6 Terra (low)	DeepSeek V4.1 Flash (non-reasoning)	GPT-5.6 Terra (non-reasoning)
Intelligence Index	42	39	38	34	30	27	25	21
Finance & Accounting	41	45	40	37	32	30	30	21
Strategy & Ops	47	52	44	40	34	31	36	23
Legal	41	41	40	37	34	31	30	22
Healthcare & Medical	40	41	38	34	31	27	--	--
Engineering	43	39	38	34	31	28	25	21
Economics	45	44	44	42	37	34	32	24
AA-Briefcase v1.1	1334	1422	1333	1202	1039	1014	1118	948
GDPval-AA v2.1	1452	1600	1447	1376	1265	1109	1341	1098
AutomationBench-AA	59.6%	68.9%	47.1%	42.0%	33.5%	29.1%	47.8%	12.5%
Terminal-Bench 4.0	35.4%	26.8%	10.1%	1.5%	1.0%	1.5%	5.6%	0.5%
SciCode	55.0%	51.9%	52.3%	52.4%	50.5%	49.9%	35.5%	45.1%
Humanity's Last Exam	42.9%	39.2%	41.9%	38.5%	33.3%	29.2%	10.8%	11.4%
GDP.pdf	24.0%	12.8%	24.6%	20.8%	17.0%	17.6%	3.8%	11.2%
CritPt	30.0%	14.3%	27.1%	22.9%	17.4%	9.4%	0.3%	2.0%
AA-Omniscience	0	−5	−3	−3	−5	−7	−10	−23
AA-LCR v1.1	83.0%	84.0%	79.0%	77.7%	74.0%	71.3%	55.3%	58.7%

Cost per TaskUSD	$1.40	$0.27	$0.63	$0.34	$0.18	$0.14	$0.15	$0.14
Input PriceUSD/1M Tokens	$2.00	$0.30	$2.00	$2.00	$2.00	$2.00	$0.30	$2.00
Output PriceUSD/1M Tokens	$12.00	$1.20	$12.00	$12.00	$12.00	$12.00	$1.20	$12.00
Cache Hit PriceUSD/1M Tokens	$0.20	$0.006	$0.20	$0.20	$0.20	$0.20	$0.006	$0.20
Cache Write PriceUSD/1M Tokens	$2.50	--	$2.50	$2.50	$2.50	$2.50	--	$2.50

Output SpeedTokens/s	129	179	112	111	104	104	165	111
Time to First Tokens	118.28	1.15	17.31	2.62	1.64	1.53	1.14	0.79
Time to First Answer Tokens	118.28	12.31	17.31	2.62	1.64	1.53	1.14	0.79
End-to-End Response Times	122.14	15.10	21.76	7.10	6.45	6.34	4.16	5.30
Time per Tasks	309.10	351.63	176.16	96.03	49.05	36.58	207.51	27.99

Context Window	1M	1M	1M	1M	1M	1M	1M	1M
Creator	OpenAI	DeepSeek	OpenAI	OpenAI	OpenAI	OpenAI	DeepSeek	OpenAI
License	Proprietary	Open	Proprietary	Proprietary	Proprietary	Proprietary	Open	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
Output Modality	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text
Providers		+17					+7

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 Intelligence Index Task

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

Most attractive quadrant

DeepSeek V4.1 Flash

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

DeepSeek V4.1 Flash 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 Intelligence Index 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