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DeepSeek · 17 Oct 2026

DeepSeek V4.1 Flash 1017

DeepSeek’s October refresh of its V4.1 Flash model for fast reasoning and coding workloads.

ImpactMeaningful

Material model update, access expansion, pricing shift or comparable capability change.

LifecycleGA
Since 17 Oct 2026
ContextunknownAccessAPIWeightsclosedPriceunknownCheckConfirmed
Availability
StatusTrackedChannelAPIWeightsClosedPricingUnclearDocsLinked
Source qualityProduct changelog

Release is backed by first-party product or API change documentation.

Strong source · 1 receipt

Model lineage

Where DeepSeek V4.1 Flash 1017 sits.

View full DeepSeek V lineage ↗
PreviousDeepSeek V4.1 Flash10 Sept 2026
Current briefDeepSeek V4.1 Flash 101717 Oct 2026
Compare this step with DeepSeek V4.1 Flash ↗

Model lifecycle

Know whether it is ready—and when it is leaving.

Radar tracks the model’s current access stage separately from its original announcement, including official retirement dates and recommended replacements when the lab publishes them.

LifecycleGA
Since 17 Oct 2026

Available through a public product or API channel.

Status since
17 Oct 2026
Open lifecycle source

Change Lens

What actually changed.

Normalized from the release note so different labs can be compared by the same fields, not just by launch copy.

Compared withDeepSeek V4.1 Flash

General · Coding

CapabilityGeneral · Codingchanged
AvailabilityDeepSeek APInew
PricingNo pricing change found in the indexed note.unknown
ContextNo context-window change found in the indexed note.unknown
EvidenceFirst-party sourcenew
ConfidenceConfirmed

Evidence is first-party; comparison labels are normalized by Radar.

Source qualityProduct changelog

Release is backed by first-party product or API change documentation.

Strong source · 1 receipt

Source receipts

Evidence behind the brief.

The Radar keeps claims traceable: first-party sources, normalized fields, unknowns and the latest verification marker used for this page.

Announcement17 Oct 2026
LifecycleGenerally available
AvailabilityDeepSeek API
PricingNo pricing change found in the indexed note.
ContextNo context-window change found in the indexed note.
ConfidenceConfirmed
Last checked17 Oct 2026
Needs review

Pricing, Context are not clearly specified in the indexed source note.

Why it matters

Keeps the Flash endpoint aligned with DeepSeek’s newest model revision.

Capabilities
GeneralCoding
Source

This brief links back to the first-party announcement or documentation used by the radar.

Open original source