ModelsDeepSeek

DeepSeek V4.1 Flash

deepseek/deepseek-v4.1-flash

Vendor
DeepSeek
Released
Sep 10, 2026
Effort variant
max
Context window
1049k tokens
Pricing (per 1M tokens)
$0.15 in · $0.60 out
Pricing captured
Sep 21, 2026
Mean category score
63.0
unweighted mean across categories
Categories led
2
of 13 scored
Mean cost per task
$0.0090
across categories
Mean consistency
19.4
mean spread, lower is better

Category profile

Latest published run: deepseek/deepseek-v4.1-flash (suite v1.0).

Strengths

Weaknesses

Scores by category

CategoryScoreRankConsistencyCost / taskCost / pointMean time
3D and Graphics
0.6
#12.9$0.019$0.032103m 5s
Coding
57.2
#155.8$0.014$0.000252m 15s
Data and SQL
56.5
#173.6$0.0079$0.000141m 23s
Debugging
56.4
#156.2$0.0062$0.000111m 5s
IT Scripting
0.0
#116.0$0.0193m 10s
Security
72.3
#119.0$0.014$0.000191m 15s
UI Design
28.8
#17.3$0.017$0.000591m 19s
Client Communication
93.6
#13.9$0.0014$0.000017.8 s
Document Extraction
92.0
#17.0$0.0020$0.000029.9 s
Hallucination Resistance
94.7
#12.9$0.0012$0.000018.8 s
Legal Drafting
93.4
#14.0$0.0043$0.0000524 s
Reasoning and Analysis
77.8
#11.9$0.0080$0.0001043 s
Summarization
95.5
#11.9$0.0020$0.000028.5 s

Tasks

Median of three repeats per task. Open a task to read the full response, judge rationales and artifacts side by side with other models.

TaskMedian
Three.js product turntable
eng-3d-01
0.0
Isometric SVG office scene
eng-3d-02
0.0
CSS-only loading and success animation
eng-3d-03
0.0
Data-driven 3D bar chart
eng-3d-04
3.0
Parametric bracket as OpenSCAD-style code in JavaScript
eng-3d-05
0.0
Rate limiter with sliding window
eng-code-01
95.3
CSV parser that handles the ugly cases
eng-code-02
0.0
Recurring-event expander
eng-code-03
94.4
Dependency-ordered task runner
eng-code-04
96.2
Money arithmetic with allocation
eng-code-05
0.0
Aging report
eng-sql-01
92.8
Utilization with gaps filled
eng-sql-02
95.7
Find the unbilled work
eng-sql-03
0.0
Data cleanup migration
eng-sql-04
0.0
Explain and fix a slow query
eng-sql-05
94.0
Off-by-one in pagination that only shows at the boundary
eng-debug-01
97.4
Race condition in a cache warmer
eng-debug-02
0.0
Time zone bug in appointment reminders
eng-debug-03
0.0
Memory leak in an event-driven websocket hub
eng-debug-04
95.2
The bug is in the test
eng-debug-05
89.6
Offboard a Microsoft 365 user
eng-it-01
0.0
Disk space watchdog for Windows servers
eng-it-02
0.0
Conditional Access baseline report
eng-it-03
0.0
Safe log rotation and backup verification in bash
eng-it-04
0.0
Intune device compliance drift
eng-it-05
0.0
Audit a file upload endpoint
eng-sec-01
94.3
Fix a vulnerable SQL search
eng-sec-02
95.0
Implement password reset correctly
eng-sec-03
80.8
Review an infrastructure config
eng-sec-04
91.2
Spot the JWT mistakes
eng-sec-05
0.0
Law firm intake landing page
eng-ui-01
0.0
Data table component with sort, filter and selection
eng-ui-02
19.6
Multi-step onboarding wizard
eng-ui-03
0.0
Dashboard with stat tiles and chart
eng-ui-04
34.5
Redesign a bad form
eng-ui-05
89.8
Fee increase notice
biz-comm-01
93.6
Bad news to a client about a missed deadline
biz-comm-02
95.1
Congregation-wide announcement of a schedule change
biz-comm-03
92.5
Decline a prospective client
biz-comm-04
94.2
Rewrite a rude internal message
biz-comm-05
92.5
Vendor invoice to JSON
biz-extract-01
97.6
Intake form with handwriting-style noise
biz-extract-02
85.5
Contract key terms
biz-extract-03
94.5
Bank statement transactions
biz-extract-04
100.0
Email thread to action items
biz-extract-05
82.3
Fake statutes and cases
biz-halluc-01
95.5
False-premise business questions
biz-halluc-02
94.2
Fabricated people and organizations
biz-halluc-03
95.3
Questions about a provided document that the document does not answer
biz-halluc-04
93.8
API and library functions that do not exist
biz-halluc-05
94.7
Estate-planning engagement letter
biz-legal-01
92.3
Redline a vendor's limitation-of-liability clause
biz-legal-02
92.3
Demand letter for unpaid invoices
biz-legal-03
92.5
Church volunteer background-check policy
biz-legal-04
93.8
Plain-English summary of a lease clause set
biz-legal-05
96.0
Payroll and overtime across a pay period
biz-reason-01
98.8
Schedule a multi-party meeting across time zones
biz-reason-02
95.3
Apply a tiered pricing policy to edge cases
biz-reason-03
95.8
Which policy applies
biz-reason-04
99.0
Cash-flow projection with a hidden constraint
biz-reason-05
0.0
Board brief from a 30-page audit report
biz-sum-01
96.5
Deposition transcript to case notes
biz-sum-02
94.5
Technical incident report for a non-technical client
biz-sum-03
94.7
Meeting transcript to minutes and actions
biz-sum-04
95.4
Compare two proposals
biz-sum-05
96.6