Model vs model

DeepSeek V4.1 Flash 1017 vs Gemini 3.8 Flash

DeepSeek V4.1 Flash 1017 is the better pick on both counts: it scores 45.1 on the Artificial Analysis Intelligence Index against 40.9 for Gemini 3.8 Flash, and costs $0.26 per 1M tokens blended against $1.50. The biggest gap is on Terminal-Bench 4.0 (terminal tasks), where DeepSeek V4.1 Flash 1017 scores 33.8 against 19.7 for Gemini 3.8 Flash.

By ModelCompare · 23 October 2026

At a glance

Longer bar means the bigger number.

Blended price · per 1M tokens, lower is better

DeepSeek V4.1 Flash 1017$0.26

Gemini 3.8 Flash$1.50

Intelligence Index · Artificial Analysis, higher is better

DeepSeek V4.1 Flash 101745.1

Gemini 3.8 Flash40.9

Where they sit among all 30 models

DeepSeek V4.1 Flash 1017 ranks 9th of the 29 models with an Intelligence Index, Gemini 3.8 Flash 14th. Up and to the left is smarter for less money. Hover or tap a dot for its numbers, then click it to compare that model with DeepSeek V4.1 Flash 1017.

Intelligence: the Artificial Analysis Intelligence Index. Price: blended per 1M tokens, 3 parts input to 1 part output, on a log scale.

Which one to pick

Pick DeepSeek V4.1 Flash 1017 if

you want the lower bill ($0.26 vs $1.50 per 1M tokens blended)
you want the higher overall score (45.1 vs 40.9)
you care about Terminal-Bench 4.0 (terminal tasks): 33.8 vs 19.7
you want open weights you can run yourself

Pick Gemini 3.8 Flash if

you need to send video, audio and PDFs

See how they answer your prompt

How smart is each one?

Of the 11 scores both models have, DeepSeek V4.1 Flash 1017 is ahead on 6 and Gemini 3.8 Flash on 4, and one is within a point.

Every intelligence score we have

Out of 100, higher is better. DeepSeek V4.1 Flash 1017 Gemini 3.8 Flash

Overall

Intelligence Index
45.140.9

By area

Coding
76.3
DeepSeek V4.1 Flash 1017: not scored yet
Agentic work
40.2
DeepSeek V4.1 Flash 1017: not scored yet

By field of work

Finance & accounting
48.346.8
Legal
46.451.6
Healthcare & medicine
40.1
DeepSeek V4.1 Flash 1017: not scored yet
Economics
50.552.4
Engineering
45.242.8
Strategy & operations
52.548.4

Benchmarks

Factual knowledge · SimpleQA
42.569.7
Hard reasoning · Humanity's Last Exam
43.347.8
Science · GPQA Diamond
95.3
DeepSeek V4.1 Flash 1017: not scored yet
Scientific coding · SciCode
55.9 · 56.6
Terminal tasks · Terminal-Bench 4.0
33.819.7
Tool use · τ-Bench Banking
44.9
DeepSeek V4.1 Flash 1017: not scored yet
Long documents · AA-LCR
82.781.3
Uncensored · UGI
46.7
DeepSeek V4.1 Flash 1017: not scored yet

Our tests

Hallucination test · our test, higher means it made up less
77
DeepSeek V4.1 Flash 1017: not scored yet
Rule that has to last 4 turns · our test, % of tries passed
100
DeepSeek V4.1 Flash 1017: not scored yet
Three bullets, no letter e · our test, % of tries passed
100
DeepSeek V4.1 Flash 1017: not scored yet

Test them on your own question

The specs

Spec	DeepSeek V4.1 Flash 1017	Gemini 3.8 Flash
Input price	$0.15 per 1M	$0.75 per 1M
Output price	$0.60 per 1M	$3.75 per 1M
Context window	1.05M	1.05M
Max output	393K	66K
Accepts	Text, Image	Text, Image, Video, Audio, PDF
Open weights	Yes	No
Lab	DeepSeek	Google
Released	Oct 2026	Sep 2026
Knowledge cutoff	May 2025	Not published

Blended price weighs 3 parts input to 1 part output. List prices from models.dev.

Questions

Is DeepSeek V4.1 Flash 1017 or Gemini 3.8 Flash cheaper?

DeepSeek V4.1 Flash 1017 is cheaper. It charges $0.15 per 1M input tokens and $0.60 per 1M output tokens, against $0.75 and $3.75 for Gemini 3.8 Flash. Blended 3 parts input to 1 part output, that is $0.26 against $1.50 per 1M tokens.

Which is smarter, DeepSeek V4.1 Flash 1017 or Gemini 3.8 Flash?

DeepSeek V4.1 Flash 1017 scores higher on the Artificial Analysis Intelligence Index, 45.1 against 40.9 for Gemini 3.8 Flash. The biggest differences are on Terminal-Bench 4.0 (33.8 vs 19.7) and Humanity's Last Exam (43.3 vs 47.8).

Which has the longer context window?

Both accept 1.05M tokens.

Can I compare DeepSeek V4.1 Flash 1017 and Gemini 3.8 Flash on my own prompt?

Yes. ModelCompare sends one prompt to both models at once and shows each answer side by side with what it cost. You can try it free without an account.

Still deciding? Send one prompt to both and read the answers side by side, with what each one cost. Compare DeepSeek V4.1 Flash 1017 and Gemini 3.8 Flash →

Where the numbers come from

Intelligence Index and benchmark scores are from Artificial Analysis, at each model’s highest effort, except SimpleQA, which is from Epoch AI, and the Uncensored score, which is from the UGI Leaderboard. The hallucination test is ours: questions with one exact answer, fake evidence pushed against right answers and requests that tempt a model to name packages that don’t exist. Prices are list prices from models.dev. Example answers come from our own test runs. Updated October 23, 2026.