Model provider / DeepSeek

DeepSeek V4.1 Flash

Asia · China · First tracked 17 Oct 2026 · Pricing verified 26 Oct 2026

Official model page not yet on record

Listed price on OpenRouter ↗
Global rank
#1

Current leader across the tracked routed-model set.

17.85%Routed share
▲ 10Place this week
2 weeksRanked · 1 in top 3
Low costPrice position
Live model recordTrailing seven days ending 25 Oct 2026 · refreshed daily
The current read

What the evidence shows today.

The page leads with what has been observed, then separates price, capability and history so a buyer can see both the signal and its limits.

Adoption
+15.58 percentage points

Routed share moved from 2.27% to 17.85% across 2 tracked weeks.

Economics
$0.15 in · $0.6 out

Per one million tokens. Cached input is listed at $0.003.

Operating fit
1M context · open weights

Reasoning, tool calling and structured output are supported.

Model economics

Published price, translated into a workload.

Live per-token pricing via OpenRouter, verified 26 Oct 2026. Batch and long-context tiers are not published in the feed, so they are omitted rather than estimated.

Input
$0.15
/ 1M tokens
Output
$0.60
/ 1M tokens
Cached input
$0.003
/ 1M tokens
Free tier
—
on OpenRouter
Context window
1M
tokens
Weights
Open weights
license basis
Estimated monthly cost
$0
Input (uncached)$0
Cached input$0
Output$0
$0 per completed task

An estimate from published per-token pricing and your assumptions. Actual costs vary by provider and usage tier.

Compare the same workload
DeepSeek V4.1 Flash (You)$0
DeepSeek V4 Flash$0
Google Gemini 2.5 Flash$0
Anthropic Claude Sonnet 5$0

Same workload as the calculator above, at each model's current price. Monthly USD.

Price and adoption

Every point is an observed week.

Routed-token share over time, with no interpolation presented as evidence. A price line joins it as real changes are recorded.

0%5%10%15%20% 17.85% 18 Oct 2026: 2.27%25 Oct 2026: 17.85% 18 Oct25 Oct
All 2 tracked weeks · 18 Oct to 25 Oct. Longer periods open as the record grows.
Operating profile

What it supports, and what remains undisclosed.

Verified support, explicit non-support and missing disclosure read differently on purpose. A blank is never made to look like a negative finding.

Capabilities
Context window1M
Reasoning✓ Supported
Tool calling✓ Supported
Structured output✓ Supported
Image input✓ Supported
Audio input— Not supported
Video input— Not supported
Open weights✓ Yes
API availability✓ Yes
Commercial licenseVerify terms with the provider
Model facts
Observed by yellow3
Current rank
#1
Peak rank
#1
Routed share
17.85%
Peak share
17.85%
Weeks ranked
2
First tracked
17 Oct 2026
Region of origin
Asia · China
Model facts
Provider
DeepSeek
Model family
Not yet on record
Release date
Not yet on record
Type
Multimodal (text + image)
Modalities
text, image
Context window
1M tokens
Weights
Open weight
License
Not yet on record
100.00%Availability (30d)
0.00%Error / downtime

Median provider uptime across OpenRouter endpoints, last 30 days. Latency and throughput are not published by the source and are not estimated here.

Why it is moving

Observed first. Interpreted only when sourced.

Observed data

In the week ending 25 Oct 2026, DeepSeek V4.1 Flash rose 10 places to #1 with 17.85% of routed tokens and a peak rank of #1.

yellow3 analysis

A sourced weekly interpretation of what is driving this model's routing is added as the record accumulates. yellow3 does not publish a reason for movement unless the routed-traffic data or a cited source supports it.

Model and provider signals

What changed around this model.

Dated developments concerning this model and its provider. Facts, evidence status and yellow3 analysis remain separate.

9 verified signals in this recordEvidence verified through
  1. Measured observation

    DeepSeek V4.1 Flash entered the routed top 3.

    Rank moved from #11 to #1 as routed share reached 17.85% in the seven days ending 25 Oct 2026. The record does not assign a cause.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Adoption move
    Rank
    #11#1
    Routed share
    2.27%17.85%
    Evidence status
    Measured observation
    Before and after recorded
    Also this week
    • Entered top 10
    • Biggest weekly rise +10 places
    • Peak routed share 17.85%
    Recorded in the same observed week as this signal, and part of the same movement rather than separate events.
    Source and dates
    OpenRouter routing rankings
    Open original source for OpenRouter routing rankings (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Price and adoptionAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
  2. Measured observation

    DeepSeek V4.1 Flash entered the routed top 20.

    Routed share reached 2.27% in the seven days ending 18 Oct 2026. The record does not assign a cause.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Adoption move
    Rank
    Value recorded: #11
    Routed share
    Value recorded: 2.27%
    Evidence status
    Measured observation
    Source and dates
    OpenRouter routing rankings
    Open original source for OpenRouter routing rankings (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Price and adoptionAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
  3. Measured observation

    Listed input and output prices changed.

    OpenRouter's listed price changed from $0.04 input and $0.68 output to $0.01 and $0.59 per one million tokens.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Price change
    Input · per 1M tokens
    $0.04$0.01▼ 60%
    Output · per 1M tokens
    $0.68$0.59▼ 13%
    Evidence status
    Measured observation
    Before and after recorded
    Source and dates
    OpenRouter listed price
    Open original source for OpenRouter listed price (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Model economicsPrice historyAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
  4. Measured observation

    Listed input and output prices changed.

    OpenRouter's listed price changed from $0.02 input and $0.72 output to $0.04 and $0.68 per one million tokens.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Price change
    Input · per 1M tokens
    $0.02$0.04▲ 52%
    Output · per 1M tokens
    $0.72$0.68▼ 5%
    Evidence status
    Measured observation
    Before and after recorded
    Source and dates
    OpenRouter listed price
    Open original source for OpenRouter listed price (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Model economicsPrice historyAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
  5. Measured observation

    Listed input and output prices changed.

    OpenRouter's listed price changed from $0.02 input and $0.89 output to $0.02 and $0.72 per one million tokens.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Price change
    Input · per 1M tokens
    $0.02$0.02▲ 18%
    Output · per 1M tokens
    $0.89$0.72▼ 19%
    Evidence status
    Measured observation
    Before and after recorded
    Source and dates
    OpenRouter listed price
    Open original source for OpenRouter listed price (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Model economicsPrice historyAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
  6. Measured observation

    Listed input and output prices changed.

    OpenRouter's listed price changed from $0.04 input and $0.63 output to $0.02 and $0.89 per one million tokens.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Price change
    Input · per 1M tokens
    $0.04$0.02▼ 54%
    Output · per 1M tokens
    $0.63$0.89▲ 41%
    Evidence status
    Measured observation
    Before and after recorded
    Source and dates
    OpenRouter listed price
    Open original source for OpenRouter listed price (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Model economicsPrice historyAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
Show 3 older signalsHide older signals
  1. Measured observation

    Listed input and output prices fell by 50%.

    OpenRouter's listed price changed from $0.30 input and $1.20 output to $0.15 and $0.60 per one million tokens.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Price change
    Input · per 1M tokens
    $0.30$0.15▼ 50%
    Output · per 1M tokens
    $1.20$0.60▼ 50%
    Evidence status
    Measured observation
    Before and after recorded
    Source and dates
    OpenRouter listed price
    Open original source for OpenRouter listed price (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    At the model page's Coding agent assumptions, estimated monthly cost falls from $21.42 to $10.71. This is an economics effect, not evidence of improved capability or higher adoption.

    Related context
    Model economicsPrice historyAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
  2. Measured observation

    Listed input and output prices changed.

    OpenRouter's listed price changed from $0.05 input and $1.20 output to $0.04 and $1.00 per one million tokens.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Price change
    Input · per 1M tokens
    $0.05$0.04▼ 29%
    Output · per 1M tokens
    $1.20$1.00▼ 17%
    Evidence status
    Measured observation
    Before and after recorded
    Source and dates
    OpenRouter listed price
    Open original source for OpenRouter listed price (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Model economicsPrice historyAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
  3. Measured observation

    Listed input and output prices changed.

    OpenRouter's listed price changed from $0.02 input and $0.40 output to $0.03 and $0.50 per one million tokens.

    ConcernsModel · DeepSeek V4.1 FlashOpen signal Close signal
    Price change
    Input · per 1M tokens
    $0.02$0.03▲ 52%
    Output · per 1M tokens
    $0.40$0.50▲ 26%
    Evidence status
    Measured observation
    Before and after recorded
    Source and dates
    OpenRouter listed price
    Open original source for OpenRouter listed price (opens in a new tab)
    Event date
    Publication date
    Not disclosed
    Latest verification
    Why it matters

    No interpretation is published for this signal. The observation stands on its own.

    Related context
    Model economicsPrice historyAdoption history
    Evidence boundary
    Fact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.
    Corrections: none recorded
Coverage boundary

OpenRouter usage represents routed developer traffic, not the whole AI market. Timing near an adoption change does not establish causation. Sources checked for this record: OpenRouter routed-traffic rankings, OpenRouter listed price. Provider announcements and independent reporting are not yet monitored and are absent rather than nil.

History and evidence

The record behind the headline.

The current position stays connected to every observed week, price change and milestone.

Weekly rank and routed-share history for DeepSeek V4.1 Flash
Week endingRankRouted shareΔ shareMovementRegion rankStatus
25 Oct 2026#117.85%+15.58▲ 10places up#1ranked
18 Oct 2026#112.27%–NEW#8NEW
Price history
DateInput / 1MOutput / 1MChangeSource
18 Oct 2026$0.15$0.60Not establishedOpenRouter listed price
17 Oct 2026$0.015$0.59▼ 13%OpenRouter listed price
16 Oct 2026$0.036$0.68▼ 5%OpenRouter listed price
15 Oct 2026$0.024$0.72▼ 19%OpenRouter listed price
14 Oct 2026$0.020$0.89▲ 41%OpenRouter listed price
13 Oct 2026$0.044$0.63Not establishedOpenRouter listed price
12 Oct 2026$0.15$0.60▼ 50%OpenRouter listed price
9 Oct 2026$0.30$1.20Not establishedOpenRouter listed price
8 Oct 2026$0.036$1.00▼ 17%OpenRouter listed price
7 Oct 2026$0.050$1.20Not establishedOpenRouter listed price
6 Oct 2026$0.050$1.32Not establishedOpenRouter listed price
5 Oct 2026$0.30$1.20Not establishedOpenRouter listed price
4 Oct 2026$0.003$2.40Not establishedOpenRouter listed price
2 Oct 2026$0.30$1.20Not establishedOpenRouter listed price
1 Oct 2026$0.030$0.50▲ 26%OpenRouter listed price
30 Sep 2026$0.020$0.40Not establishedOpenRouter listed price
29 Sep 2026$0.30$1.20Not establishedOpenRouter listed price
27 Sep 2026$0.035$0.29Not establishedOpenRouter listed price
26 Sep 2026$0.30$1.20Not establishedOpenRouter listed price
25 Sep 2026$0.15$0.60Not establishedOpenRouter listed price
24 Sep 2026$0.14$0.42Not establishedOpenRouter listed price
23 Sep 2026$0.100$0.50Not establishedOpenRouter listed price
10 Sep 2026$0.15$0.60—OpenRouter listed price

OpenRouter publishes one headline price per model, and that price follows whichever provider it is currently routing to. At the latest reading this model was offered by 35 providers at prices from $0.020 to $0.33 per million input tokens. A move in the headline therefore does not establish that anyone changed a price. yellow3 records the providers charging the listed price with every observation and reports a change only where a provider charging the earlier price is charging the new one. Observations recorded before 23 September 2026 do not name the provider, so the prices are published and no change is derived from them. See the correction record.

Milestones
  • 17 Oct 2026First trackedDerived from yellow3 routed-traffic data
  • 18 Oct 2026Entered top 20Derived from yellow3 routed-traffic data
  • 25 Oct 2026Entered top 10Derived from yellow3 routed-traffic data
  • 25 Oct 2026Entered top 3Derived from yellow3 routed-traffic data
  • 25 Oct 2026Reached number oneDerived from yellow3 routed-traffic data
  • 25 Oct 2026Peak routed share 17.85%Derived from yellow3 routed-traffic data
  • 25 Oct 2026Biggest weekly rise +10 placesDerived from yellow3 routed-traffic data
Sources and methodology

Every claim keeps its route back to evidence.

Region reflects where the model's developer is headquartered. Figures are OpenRouter routing traffic, aggregated over a trailing seven days - developer routing behaviour, not the whole market.

Read the research framework →

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Public research / Paid intelligence

Follow the model, not the launch cycle.

The public record shows today's evidence. yellow3 Model Intelligence adds longer history, watchlists, alerts, comparisons and decision reporting.

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