DeepSeek V4.1 Flash vs Claude Fable 5.1: 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 Claude Fable 5.1 releases: 2 and 5 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 7 models.

For intelligence, Claude Fable 5.1 scores highest: Claude Fable 5.1 (Max, Default Fallback) at 53, 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 Claude Fable 5.1 (Max, Default Fallback) at 71 t/s for Claude Fable 5.1.
For cost per task, DeepSeek V4.1 Flash is cheapest: DeepSeek V4.1 Flash (Non-reasoning) at $0.15, against Claude Fable 5.1 (Low, Default Fallback) at $2.37 for Claude Fable 5.1.

Model Playground

Releases compared


	Claude Fable 5.1 (max with fallback)	Claude Fable 5.1 (xhigh with fallback)	Claude Fable 5.1 (high with fallback)	Claude Fable 5.1 (medium with fallback)	Claude Fable 5.1 (low with fallback)	DeepSeek V4.1 Flash (max)	DeepSeek V4.1 Flash (non-reasoning)
Intelligence Index	53	53	51	49	47	39	25
Finance & Accounting	56	56	54	51	49	45	30
Strategy & Ops	60	58	56	54	51	52	36
Legal	60	61	58	57	53	41	30
Healthcare & Medical	58	--	--	--	--	41	--
Engineering	56	57	54	51	49	39	25
Economics	63	62	60	58	55	44	32
AA-Briefcase v1.1	1674	1655	1580	1528	1482	1422	1118
GDPval-AA v2.1	1754	1732	1635	1545	1469	1600	1341
AutomationBench-AA	59.4%	57.8%	55.3%	54.7%	52.2%	68.9%	47.8%
Terminal-Bench 4.0	52.0%	55.1%	52.0%	44.9%	40.4%	26.8%	5.6%
SciCode	63.1%	60.9%	58.7%	56.4%	56.7%	51.9%	35.5%
Humanity's Last Exam	59.1%	58.7%	55.9%	53.8%	48.9%	39.2%	10.8%
GDP.pdf	26.2%	26.2%	26.8%	26.8%	28.0%	12.8%	3.8%
CritPt	29.7%	31.1%	30.3%	29.1%	27.7%	14.3%	0.3%
AA-Omniscience	43	42	41	38	34	−5	−10
AA-LCR v1.1	85.3%	83.0%	83.7%	84.7%	82.3%	84.0%	55.3%

Cost per TaskUSD	$7.63	$5.98	$3.91	$2.98	$2.37	$0.27	$0.15
Input PriceUSD/1M Tokens	$10.00	$10.00	$10.00	$10.00	$10.00	$0.30	$0.30
Output PriceUSD/1M Tokens	$50.00	$50.00	$50.00	$50.00	$50.00	$1.20	$1.20
Cache Hit PriceUSD/1M Tokens	$0.25	$0.25	$0.25	$0.25	$0.25	$0.006	$0.006
Cache Write PriceUSD/1M Tokens	$12.50	$12.50	$12.50	$12.50	$12.50	--	--

Output SpeedTokens/s	71	60	49	49	48	179	171
Time to First Tokens	261.97	122.51	16.91	11.41	3.05	1.12	1.08
Time to First Answer Tokens	261.97	122.51	16.91	11.41	3.05	12.28	1.08
End-to-End Response Times	269.01	130.78	27.02	21.59	13.45	15.07	4.00
Time per Tasks	684.69	608.06	450.21	341.41	270.76	350.10	201.10

Context Window	1M	1M	1M	1M	1M	1M	1M
Creator	Anthropic	Anthropic	Anthropic	Anthropic	Anthropic	DeepSeek	DeepSeek
License	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Open	Open
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
Output Modality	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text	Supports: text
Providers						+15	+4

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

Claude Fable 5.1

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 Claude Fable 5.1: 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