DeepSeek V4.1 Flash

deepseek/deepseek-v4.1-flash

V4.1 hybrid-attention reasoning with vision.

cmd --model deepseek/deepseek-v4.1-flash
Intelligence index
39.5
Coding index
not yet scored
Input
$0.15 /M
Output
$0.60 /M
Cache read
$0.003 /M
Agent-loop cost
$0.05 /M in
Context window
1M tokens
Released
September 10, 2026
Modalities
→

vs. the lineup

DeepSeek V4.1 Flash beside its stablemates and nearest rivals. The ◆ marks the best value in each column across every row shown.

pin a rival:
ModelIntelligenceCodingInput $/MOutput $/MBlended $/MContext
DeepSeek V4.1 Flash ◆39.5—$0.15◆$0.60$0.26◆1M◆
DeepSeek V4 Pro (latest)3668.8$0.66$1.98$0.991M◆
DeepSeek V4 Flash Vision (exp)34.865$0.15◆$0.60$0.26◆1M◆
DeepSeek V4 Flash (latest)3469.1$0.15◆$0.60$0.26◆1M◆
DeepSeek V4 Flash Fast——$0.28$0.56◆$0.351M◆
DeepSeek V4.1 Flash Fast——$0.16$0.58$0.271M◆
Kimi K3pinned43.6◆76.2◆$3$15$61M◆
Kimi K2.7 Codepinned25.860.8$0.95$4$1.71256K

coding performance

The Intelligence Index and its sub-scores, ranked against every scored model in the catalog. A metric that has not been measured for DeepSeek V4.1 Flash has been left empty.

Intelligence Index
39.5
#29 of 73 scored
Long-context reasoning
84
reasoning across a long context
SciCode
51.9
scientific coding

peak hours

DeepSeek V4.1 Flash is not billed at one flat rate — the price changes with the time of day. Every other price on this page is the off-peak rate, which is what a request costs 17 hours out of 24. Peak runs Monday to Friday only, so it is never charged at the weekend.

BandHours (UTC)Input $/MOutput $/MCache read $/M
Off-peak17h/day$0.15$0.60$0.003
Peak7h/day · 01–04 & 06–10 UTC, Mon–Fri$0.30$1.20$0.006

usage calculator

How far a month of credits goes on DeepSeek V4.1 Flash.

Input tokensfresh prompt
800
Output tokensmodel reply
180
Cache read tokensre-read context
50K
cost / request $0.0004 · in $0.15 · out $0.60 · cache $0.003 per M
fresh input 32%output 29%cache reads 40%
Requests / 30 days
26K
$10 credits ÷ $0.0004 per request
~5.3K quick fixes~1.1K bug fixes~176 feature PRs

what real work costs

Real coding tasks priced end to end on DeepSeek V4.1 Flash, from a quick lookup to a full-repo agent run.

One agent task
$0.01
180K in at 75% cache hit, 12K out
What you pay
$0.07 /M
all-in across every token that task touched
Sticker input
$0.15 /M
cache reads bill at $0.003 /M instead
TaskTokens in · outDeepSeek V4.1 FlashClaude Haiku 5.5Claude Haiku 4.5
Quick lookup / one-liner8K · 1K$0.0007$0.0007$0.0065
Review a 500-line PR60K · 4K$0.0052$0.0042$0.04
Fix a bug (agent loop)180K · 12K$0.01$0.01$0.12
Refactor a module320K · 20K$0.03$0.02$0.21
Full-repo agent run900K · 45K$0.06$0.05$0.49

frequently asked

How much does DeepSeek V4.1 Flash cost?
$0.15/M input and $0.60/M output, cache reads $0.003/M. In an agent loop most input is cache-read, so the effective input rate is about $0.05/M.
Which plan do I need?
Available on Go and above.
How do I switch to it?
Run cmd --model deepseek/deepseek-v4.1-flash, or type /model in a session and pick it. You can switch mid-session without losing context.

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Benchmarks from Artificial Analysis (v4.3)commandcode.ai/models/deepseek-v4-1-flash