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DeepSeek-V4.1-Flash

API ID deepseek-flash

DeepSeek-V4.1-Flash is a DeepSeek model. It has a 1,000,000-token context window and up to 384,000 output tokens. It takes image input and supports function calling, structured outputs and reasoning. Standard price: $0.30 input and $1.20 output per 1M tokens.

Status
Active
Released
—
Shutdown
none announced
Replacement
—

No deprecation or shutdown date has been announced as of October 15, 2026.

Benchmarks

Scores as each source published them
or

Comparing with DeepSeek Reasoner, the previous model in this line. A score is compared only with the same benchmark from the same source, at the same setting where both have it. Full comparison: prices, limits, features

Arena

ArenaDeepSeek-V4.1-FlashDeepSeek ReasonerChangeRankDateSource
Text
By category
  • Math 1495 rank 22 vs not rated
  • Creative writing 1439 rank 61 vs not rated
  • Instruction following 1476 rank 24 vs not rated
  • Hard prompts 1499 rank 36 vs not rated
  • Long prompts 1481 rank 43 vs not rated
  • Multi-turn 1468 rank 66 vs not rated
  • Expert 1520 rank 19 vs not rated
1475 ±6not rated38 of 415
12,000 votes		Oct 13, 2026source
Text: Coding1526 ±11not rated27 of 410
3,319 votes		Oct 13, 2026source
WebDev1619 ±11not rated24 of 142
3,544 votes		Oct 13, 2026source
Vision1260 ±11not rated46 of 165
3,559 votes		Oct 9, 2026source
Agent0.030 ±0.004not rated20 of 54
228,658 sessions		Oct 14, 2026source

Rated as deepseek-v4.1-flash-max (max effort). Text, WebDev and Vision ratings come from people voting between two anonymous answers; Text and Vision are style-controlled, as on arena.ai. Agent is Arena's separate score for real agent sessions, on its own scale. Data: Arena (arena.ai), CC BY 4.0.

Epoch AI

BenchmarkDeepSeek-V4.1-FlashDeepSeek ReasonerChangeSettingRunSource
FrontierMath Tier 426.8%not runmax effortOct 8, 2026source
FrontierMath Tiers 1-367.4%not runmax effortOct 8, 2026source
GPQA Diamond89.8%83.4%+6.4 ptsmax effort (vs no setting)Oct 9, 2026source
OTIS Mock AIME 2024-202598.3%87.8%+10.5 ptsmax effort (vs no setting)Oct 8, 2026source
SimpleQA Verified42.9%not runmax effortOct 13, 2026source

Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.

On cloud platforms

All platform dates
PlatformPlatform IDStateShutdownTime leftReplacementSource
Microsoft Foundryversion 2026-04-23DeepSeek-V4-FlashActiveFeb 20, 2028493 daysDeepSeek-V4-Flash-0731source

Read daily from each platform's own pages. The shutdown date and countdown on this page use DeepSeek's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.

Aliases pointing here: deepseek-v4-flash (in place when tracking began (October 6, 2026)), deepseek-v4-flash-vision-exp (in place when tracking began (October 6, 2026))

Features

Compare models
FeatureValueSinceSource
Structured outputsThe model can be held to a JSON schema you supply, so every reply parses without retries or cleanup.Supportedin place when tracking began (October 6, 2026)source
Function callingAlso called tool use. You describe functions; the model replies with a function name and arguments for your code to run, then uses the result.Supportedin place when tracking began (October 6, 2026)source
Image inputImages such as screenshots, photos and charts can go in the prompt for the model to read.Supportedin place when tracking began (October 6, 2026)source
Reasoning / thinkingThe model can work through a problem step by step before it answers: usually better answers to hard questions, at the cost of more tokens and time.Supportedin place when tracking began (October 6, 2026)source
Context windowThe most the model can work with in one request, in tokens: your prompt, conversation history and files. A token is about three-quarters of an English word.1,000,000 tokensin place when tracking began (October 6, 2026)source
Max output tokensThe longest reply the model can write in one response, in tokens. A token is about three-quarters of an English word.384,000 tokensin place when tracking began (October 6, 2026)source

Not published by DeepSeek: Prompt caching, Batch API, PDF input, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs.

Price history

USD per 1M tokens, standard tier
$0.00$0.50$1.00$1.50Oct 2026In $0.30Out $1.20Oct 5, 2026 to Oct 15, 2026: Input $0.30, Output $1.20
$0.00$0.50$1.00$1.50Oct 2026In $0.30Out $1.20Oct 5, 2026 to Oct 15, 2026: Input $0.30, Output $1.20

We started recording this model's prices on Oct 5, 2026. The history grows with each daily check.

Show as a table
FromTypePrice
Oct 5, 2026Input$0.30
Oct 5, 2026Output$1.20

Prices

USD per 1M tokens, every type and band, by tier
TypePrice $/1MIn effect
Standard
input$0.30
cached input$0.006
output$1.20
Off-peak
input$0.15
cached input$0.003
output$0.60

Changelog

Changes we detected on DeepSeek's pages

No changes recorded yet.

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Last checked · Sources: DeepSeek pricing, DeepSeek updates