OpenAIDeepSeekLLM matchup

GPT-5.4vs.DeepSeek-V4.1-Flash

Which one is better?

DeepSeek-V4.1-Flash performs better than GPT-5.4 and is cheaper: GPT-5.4 costs 16.7 times (input) and 25 times (output) as much.

DeepSeek-V4.1-Flash ahead

IntelligenceOverall index, 100 points = average

85.4

GPT-5.4

Rank 45

99.7

DeepSeek-V4.1-Flash

Rank 29

DeepSeek-V4.1-Flash faster

SpeedTokens per second

GPT-5.4

176

DeepSeek-V4.1-Flash

DeepSeek-V4.1-Flash cheaper

Price$ per 1M tokens

$5.63

GPT-5.4

$0.26

DeepSeek-V4.1-Flash

about as popular

Popularity0 to 100

GPT-5.4

Rank 283 of 876

DeepSeek-V4.1-Flash

Rank 312 of 876

Above 272,000 tokens of context, GPT-5.4 costs more: $5 input and $22.50 output per 1M tokens.

Choose GPT-5.4 for

No clear advantage

Choose DeepSeek-V4.1-Flash for

FinanceAgentsLegalHealthCodingGeneralMultimodal

Where is the difference?

Strengths at a glance

GPT-5.4DeepSeek-V4.1-FlashMedian of all ranked models

CodingDeepSeek-V4.1-Flash ahead

GPT-5.484.8Rank 54

DeepSeek-V4.1-Flash98.8Rank 30

Median of ranked models84.1

95 % range: GPT-5.4 76.4 to 93.2, DeepSeek-V4.1-Flash 91.4 to 106.3.

AreaGPT-5.4DeepSeek-V4.1-Flash

The same values and verdicts as the bars below. In the close-up the net starts at 75 points, just below the weaker model's lowest value; the reference group average is 100. Not in the net because a model has no own value there or the data are too thin: Reasoning, Mathematics, Knowledge.

DeepSeek-V4.1-Flash is ahead in 7 of 10 areas, GPT-5.4 in none.

too little data: 3DeepSeek-V4.1-Flash ahead: 7

Areas in the overall index

AgentsDeepSeek-V4.1-Flash +1789.3 to 106.4

CodingDeepSeek-V4.1-Flash +1484.8 to 98.8

GeneralDeepSeek-V4.1-Flash +1186.4 to 97.1

MultimodalDeepSeek-V4.1-Flash +987.0 to 95.7

Reasoningonly GPT-5.4 has a score

Mathematicsonly DeepSeek-V4.1-Flash has a score

Knowledgeonly GPT-5.4 has a score

Specialist fields

FinanceDeepSeek-V4.1-Flash +1885.6 to 103.7

LegalDeepSeek-V4.1-Flash +1784.1 to 100.8

HealthDeepSeek-V4.1-Flash +1481.1 to 95.5

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Show 3 more areas that do not count toward the overall index

Cybersecurityonly DeepSeek-V4.1-Flash has a score

Productivityonly DeepSeek-V4.1-Flash has a score

Educationonly DeepSeek-V4.1-Flash has a score

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Which model for which task?

Everyday tasks, translated from the area values above. Each row names the values it rests on.

TaskBetter choicebased on

Writing and debugging codeDeepSeek-V4.1-FlashCoding 84.8 to 98.8

Maths and data analysisopenMathematics without a score for GPT-5.4, Reasoning without a score for DeepSeek-V4.1-Flash

Facts and researchopenKnowledge without a score for DeepSeek-V4.1-Flash

Agents and workflowsDeepSeek-V4.1-FlashAgents 89.3 to 106.4

Fast chat repliesDeepSeek-V4.1-Flash64 to 176 tokens per second

Security analysisopenCybersecurity without a score for GPT-5.4

Many requests on a small budgetDeepSeek-V4.1-Flash$5.63 to $0.26 per 1M tokens

Finance, legal and medical textsDeepSeek-V4.1-FlashFinance 85.6 to 103.7, Legal 84.1 to 100.8, Health 81.1 to 95.5

Images, screenshots and PDFsDeepSeek-V4.1-FlashMultimodal 87.0 to 95.7

See for yourself: same task, one attempt

The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.

Pelican on a bicycle

Prompt

Generate an SVG of a pelican riding a bicycle

Task origin: Simon Willison

GPT-5.4

Oct 1, 2026 · 117 s · $0.11

Test details

Run date: Oct 1, 2026
API provider: openrouter
Requested API model: openai/gpt-5.4
Reasoning setting: high
Token limit including reasoning: 8,192 tokens
Output tokens: 7,339 tokens
Cost of the attempt: $0.1101
Response time: 116.8 s
API model reported in response: openai/gpt-5.4
Pinned endpoint: OpenAI | openai/gpt-5.4-20260305
Temperature: Provider default
Test protocol: community-visual-tests-v1
Technical checks: Passed, not a quality rating

Visually reviewed. This individual test does not establish overall model quality.

Earlier attempts (1)

Sep 7, 2026API request failedReasoning setting: high

DeepSeek-V4.1-Flash

The response reached the token limit. No complete recording is available.

Oct 5, 2026 · 26 s · $0.0049

Not yet visually reviewed. A successful recording does not confirm correct physics or full compliance with the prompt.

Test details

Run date: Oct 5, 2026
API provider: openrouter
Requested API model: deepseek/deepseek-v4.1-flash
Reasoning setting: high
Token limit including reasoning: 8,192 tokens
Output tokens: 8,191 tokens
Cost of the attempt: $0.0049
Response time: 25.8 s
API model reported in response: deepseek/deepseek-v4.1-flash
Pinned endpoint: DeepSeek | deepseek/deepseek-v4.1-flash-20260910
Temperature: Provider default
Test protocol: community-visual-tests-v1
Technical checks: Failed

Earlier attempts (2)

Oct 2, 2026API request failedReasoning setting: high
Oct 1, 2026API request failedReasoning setting: high

SVG short test

One SVG task with the same fixed settings for every model, without hidden thinking.

Prompt

Return only one standalone SVG of a pelican riding a bicycle. Use viewBox="0 0 800 600", simple shapes, two clearly visible wheels and a recognizable pelican with a long beak. At most 30 SVG elements and 1800 characters. No Markdown, explanations, comments, scripts, animation, CSS or external resources.

GPT-5.4

Unavailable in this round

DeepSeek-V4.1-Flash

GPT-5.4 and DeepSeek-V4.1-Flash in the overall index

Every model with a place in the overall index, both models of this matchup highlighted. You can add or hide other models.

Overall index (Gradually Meta-Score v4)

20 of 92 models

5 models in this view are measured at a lower reasoning effort than max in the overall index. Dashed column: lower reasoning effort than the top.

Claude Opus 5.5max126.1

Gemini 4 Carbonhigh125.8

Claude Fable 5.1max123.8

Claude Sonnet 5.5max122.8

Gemini 4 Argonhigh122.3

GPT-6 Astramax121.3

GPT-6.1 Solmax119.2

Muse Wonder Fullmax118.3

Claude Opus 5max117.2

Muse Wondermax113.4

Kimi K3.1 Promax112.9

Claude Fable 5max112.5

GPT-6 Solmax110.5

GPT-5.6 Solmax108.7

Muse Spark 1.3max107.4

Gemini 3.7 Flashhigh107.1

DeepSeek V4.1 Flash 1017max106.6

Gemini 3.8 Flashhigh106.5

DeepSeek-V4.1-Flashmax99.7

GPT-5.4xhigh85.4

Claude Opus 5.5

Gemini 4 Carbon

Claude Fable 5.1

Claude Sonnet 5.5

Gemini 4 Argon

GPT-6 Astra

GPT-6.1 Sol

Muse Wonder Full

Claude Opus 5

Muse Wonder

Kimi K3.1 Pro

Claude Fable 5

GPT-6 Sol

GPT-5.6 Sol

Muse Spark 1.3

Gemini 3.7 Flash

DeepSeek V4.1 Flash 1017

Gemini 3.8 Flash

DeepSeek-V4.1-Flash

GPT-5.4

Popularity compared

How often the models are searched for, used and mentioned, on a scale from 0 to 100.

Both are about as popular: GPT-5.4 39, DeepSeek-V4.1-Flash 38 out of 100.

Over time

Weekly values from October 18, 2026 to November 6, 2026

GPT-5.4DeepSeek-V4.1-Flash

All data side by side

The better value is bold. For the overall index only when the gap is clear.

Metric	GPT-5.4	DeepSeek-V4.1-Flash
Intelligence
Overall indexpoints, 100 = reference group average, higher is better	85.4	99.7
Rank	Rank 45 of 92	Rank 29 of 92
Price per 1M tokens
Inputwhat you send	$2.50above 272,000 tokens: $5	$0.15
Outputwhat the model writes	$15above 272,000 tokens: $22.50	$0.60
Cost per task (own tests)average of 2 original-protocol tasks both models passed (SVG short test not included)	$0.23	$0.008
Speed
Tokens per second	64	176
Popularity
Popularitysearch, usage and mentions, 0 to 100	39Rank 283 of 876	38Rank 312 of 876
Technical
Context windowhow much text the model reads at once	1.05 M tokens≈ 1,580 A4 pages	1 M tokens≈ 1,500 A4 pages
Knowledge cutoff	Aug 31, 2025	n/a
Released	Mar 5, 2026	Sep 10, 2026
Availability	Active	Active
Open weights	no	yes

DeepSeek-V4.1-Flash: At peak times (Mon, Tue, Wed, Thu, Fri, 01:00-04:00 UTC; Mon, Tue, Wed, Thu, Fri, 06:00-10:00 UTC) the price is $0.30 input and $1.20 output per 1M tokens. The table shows the off-peak price.

Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis

Is there a better choice?

Successor of GPT-5.4GPT-5.5

Overall index 100.9, rank 24$5 input and $30 output per 1M tokens

DeepSeek-V4.1-Flash vs. GPT-5.5

Successor of DeepSeek-V4.1-FlashDeepSeek V4.1 Flash 1017

Overall index 106.6, rank 17$0.15 input and $0.60 output per 1M tokens

GPT-5.4 vs. DeepSeek V4.1 Flash 1017

Cheaper than DeepSeek-V4.1-FlashClaude Haiku 5.5

Overall index 103.4, rank 20$0.10 input and $0.50 output per 1M tokens

DeepSeek-V4.1-Flash vs. Claude Haiku 5.5

Shared benchmarks

Single results from the same benchmark version, task and metric. A value is bold only with the same test setup and a clear gap.

A: GPT-5.4B: DeepSeek-V4.1-Flash

Code MigrationOverall · higher is betterTest setup not documented as identical35.0%45.6%Vals AIAs of 10/29/2026

LegalBenchOverall · higher is betterTest setup not documented as identical86.0%83.3%Vals AIAs of 10/13/2026

LMArena Code Arena WebDevOverall · higher is betterTest setup not documented as identical1,4011,619LMArenaAs of 10/28/2026

LMArena Text, Style ControlOverall · higher is betterTest setup not documented as identical1,4751,476LMArenaAs of 10/28/2026

LMArena Vision, Style ControlOverall · higher is betterTest setup not documented as identical1,2841,261LMArenaAs of 10/19/2026

MedCodeOverall · higher is betterTest setup not documented as identical41.3%41.2%Vals AIAs of 10/29/2026

MedScribeOverall · higher is betterTest setup not documented as identical77.5%85.5%Vals AIAs of 10/29/2026

MMMU-ProOverall · higher is better70.6%65.6%Artificial AnalysisAs of 11/06/2026

ProgramBenchOverall · higher is betterTest setup not documented as identical0.0%0.5%Vals AIAs of 11/05/2026

SkillsBenchOverall · higher is betterTest setup not documented as identical51.7%69.8%Vals AIAs of 10/29/2026

Show 53 more benchmarks

Vibe Code Bench v1.1Overall · higher is betterTest setup not documented as identical67.4%84.7%Vals AIAs of 11/05/2026

Code MigrationCLI · higher is betterTest setup not documented as identical23.8%37.5%Vals AIAs of 10/29/2026

LegalBenchConclusion Tasks · higher is betterTest setup not documented as identical88.9%89.1%Vals AIAs of 10/13/2026

LMArena Code Arena WebDevHTML development · higher is betterTest setup not documented as identical1,4281,613LMArenaAs of 10/28/2026

LMArena Text, Style ControlBusiness, management and finance · higher is betterTest setup not documented as identical1,4821,478LMArenaAs of 10/28/2026

LMArena Vision, Style ControlChinese · higher is betterTest setup not documented as identical1,3161,311LMArenaAs of 10/19/2026

ProgramBenchAlmost Resolved · higher is betterTest setup not documented as identical7.0%16.5%Vals AIAs of 11/05/2026

SkillsBenchNo Skills · higher is betterTest setup not documented as identical48.9%61.7%Vals AIAs of 10/29/2026

Code MigrationCOBOL · higher is betterTest setup not documented as identical68.6%70.0%Vals AIAs of 10/29/2026

LegalBenchInterpretation Tasks · higher is betterTest setup not documented as identical83.9%80.4%Vals AIAs of 10/13/2026

LMArena Code Arena WebDevImage to WebDev · higher is betterTest setup not documented as identical1,4361,606LMArenaAs of 10/19/2026

LMArena Text, Style ControlChinese · higher is betterTest setup not documented as identical1,5061,523LMArenaAs of 10/28/2026

LMArena Vision, Style ControlCreative writing with images · higher is betterTest setup not documented as identical1,2621,254LMArenaAs of 10/19/2026

ProgramBenchFully Resolved · higher is betterTest setup not documented as identical0.0%0.5%Vals AIAs of 11/05/2026

SkillsBenchWith Skills · higher is betterTest setup not documented as identical51.7%69.8%Vals AIAs of 10/29/2026

Code MigrationCode Quality · higher is betterTest setup not documented as identical3.632 / 54.411 / 5Vals AIAs of 10/29/2026

LegalBenchIssue Tasks · higher is betterTest setup not documented as identical90.5%88.8%Vals AIAs of 10/13/2026

LMArena Code Arena WebDevReact development · higher is betterTest setup not documented as identical1,3891,629LMArenaAs of 10/28/2026

LMArena Text, Style ControlCoding · higher is betterTest setup not documented as identical1,5201,523LMArenaAs of 10/28/2026

LMArena Vision, Style ControlDiagram understanding · higher is betterTest setup not documented as identical1,3211,293LMArenaAs of 10/19/2026

ProgramBenchRaw Pass Rate · higher is betterTest setup not documented as identical68.6%72.0%Vals AIAs of 11/05/2026

LegalBenchRhetoric Tasks · higher is betterTest setup not documented as identical82.8%80.1%Vals AIAs of 10/13/2026

LMArena Code Arena WebDevWeb development · higher is betterTest setup not documented as identical1,4011,619LMArenaAs of 10/28/2026

LMArena Text, Style ControlCreative writing · higher is betterTest setup not documented as identical1,4421,441LMArenaAs of 10/28/2026

LMArena Vision, Style ControlEnglish · higher is betterTest setup not documented as identical1,2811,268LMArenaAs of 10/19/2026

LegalBenchRule Tasks · higher is betterTest setup not documented as identical84%78%Vals AIAs of 10/13/2026

LMArena Text, Style ControlEnglish · higher is betterTest setup not documented as identical1,4761,488LMArenaAs of 10/28/2026

LMArena Vision, Style ControlHomework · higher is betterTest setup not documented as identical1,3301,307LMArenaAs of 10/19/2026

LMArena Text, Style ControlEntertainment, sports and media · higher is betterTest setup not documented as identical1,4411,450LMArenaAs of 10/28/2026

LMArena Vision, Style ControlHumor · higher is betterTest setup not documented as identical1,2641,243LMArenaAs of 10/19/2026

LMArena Text, Style ControlExcluding ties · higher is betterTest setup not documented as identical1,4841,486LMArenaAs of 10/28/2026

LMArena Vision, Style ControlOptical character recognition · higher is betterTest setup not documented as identical1,2991,272LMArenaAs of 10/19/2026

LMArena Text, Style ControlExpert prompts · higher is betterTest setup not documented as identical1,5141,516LMArenaAs of 10/28/2026

LMArena Text, Style ControlFrench prompts · higher is betterTest setup not documented as identical1,5011,482LMArenaAs of 10/28/2026

LMArena Text, Style ControlGerman prompts · higher is betterTest setup not documented as identical1,4761,489LMArenaAs of 10/28/2026

LMArena Text, Style ControlHard prompts · higher is betterTest setup not documented as identical1,4971,499LMArenaAs of 10/28/2026

LMArena Text, Style ControlHard prompts, English · higher is betterTest setup not documented as identical1,4931,504LMArenaAs of 10/28/2026

LMArena Text, Style ControlInstruction following · higher is betterTest setup not documented as identical1,4711,477LMArenaAs of 10/28/2026

LMArena Text, Style ControlJapanese prompts · higher is betterTest setup not documented as identical1,4781,452LMArenaAs of 10/28/2026

LMArena Text, Style ControlKorean prompts · higher is betterTest setup not documented as identical1,4331,444LMArenaAs of 10/28/2026

LMArena Text, Style ControlLegal and government · higher is betterTest setup not documented as identical1,4901,459LMArenaAs of 10/28/2026

LMArena Text, Style ControlLife, physical and social science · higher is betterTest setup not documented as identical1,4881,490LMArenaAs of 10/28/2026

LMArena Text, Style ControlLonger queries · higher is betterTest setup not documented as identical1,4811,481LMArenaAs of 10/28/2026

LMArena Text, Style ControlMath · higher is betterTest setup not documented as identical1,4911,498LMArenaAs of 10/28/2026

LMArena Text, Style ControlMathematical professions · higher is betterTest setup not documented as identical1,4991,495LMArenaAs of 10/28/2026

LMArena Text, Style ControlMedicine and healthcare · higher is betterTest setup not documented as identical1,4741,508LMArenaAs of 10/28/2026

LMArena Text, Style ControlMulti-turn · higher is betterTest setup not documented as identical1,4931,468LMArenaAs of 10/28/2026

LMArena Text, Style ControlNon-English · higher is betterTest setup not documented as identical1,4681,461LMArenaAs of 10/28/2026

LMArena Text, Style ControlPolish prompts · higher is betterTest setup not documented as identical1,4831,473LMArenaAs of 10/28/2026

LMArena Text, Style ControlRussian prompts · higher is betterTest setup not documented as identical1,4871,480LMArenaAs of 10/28/2026

LMArena Text, Style ControlSoftware and IT services · higher is betterTest setup not documented as identical1,5071,514LMArenaAs of 10/28/2026

LMArena Text, Style ControlSpanish prompts · higher is betterTest setup not documented as identical1,4541,463LMArenaAs of 10/28/2026

LMArena Text, Style ControlWriting, literature and language · higher is betterTest setup not documented as identical1,4641,456LMArenaAs of 10/28/2026

More comparisons

Compare GPT-5.4 and DeepSeek-V4.1-Flash with the models people compare them with most often.

GPT-5.4vs.DeepSeek-V4.1-Flash

Choose GPT-5.4 for

Choose DeepSeek-V4.1-Flash for

Where is the difference?

Strengths at a glance

Which model for which task?

See for yourself: same task, one attempt

Pelican on a bicycle

SVG short test

GPT-5.4

DeepSeek-V4.1-Flash

GPT-5.4 and DeepSeek-V4.1-Flash in the overall index

Overall index (Gradually Meta-Score v4)

Popularity compared

Over time

All data side by side

Is there a better choice?

Shared benchmarks

More comparisons

Compare another matchup

Predecessor and successor

The most popular comparisons