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DeepSeek V4.1 Flash · DeepSeek

What does DeepSeek V4.1 Flash cost to run in a coding agent?

DeepSeek V4.1 Flash costs about $0.0067 per average coding-agent request on our measured traffic, at list prices of $0.30 per million input and $1.20 per million output tokens. It handles high-volume agent steps and scores 39 on the Artificial Analysis Intelligence Index. (Source: Artificial Analysis (artificialanalysis.ai))

List prices: DeepSeek API pricing, checked 2026-10-13. Request costs: Standard Compute gateway data, 79,301 coding-agent requests from 75 users, Sep 13 to Oct 12, 2026. How we compute this

Run DeepSeek V4.1 Flash in your agent from $19/month

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What DeepSeek V4.1 Flash costs per coding-agent request

Cost at list priceDeepSeek V4.1 Flash
Prompt under 100K tokens50% of requests, 87% of input cached$0.0033
Prompt of 100K to 272K39% of requests, 88% of input cached$0.0080
Prompt over 272K tokens11% of requests, 86% of input cached$0.018
Average request$0.0067
100 requests$0.67
Median session16 requests; a session ends after 10 idle minutes$0.091
A month of regular usemedian of 20 users active on 5+ days$9.13

Each logged request priced at the vendor's list rates for its own token counts, including cache reads and any higher rate for long prompts. Average output: 698 tokens per request.

What to watch for

These are DeepSeek's peak-hour rates (01:00 to 04:00 and 06:00 to 10:00 UTC on weekdays). The rest of the time it costs half, $0.33 per 100 requests. At peak rates GPT-6 Luna is cheaper per request ($0.0041 vs $0.0067); off-peak, DeepSeek is.

Where DeepSeek V4.1 Flash sits on the Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index bar chart with DeepSeek V4.1 Flash (max) highlighted, from artificialanalysis.ai, October 13, 2026
Artificial Analysis Intelligence Index v4.3.2, DeepSeek V4.1 Flash (max) highlighted, downloaded October 13, 2026. Source: Artificial Analysis (artificialanalysis.ai)

About DeepSeek V4.1 Flash

DeepSeek V4.1 Flash is a 552B mixture-of-experts model released September 10, 2026 with open weights under the MIT license and a 1M-token context. It is the most-used model on OpenCode's public usage board by tokens as of October 13, 2026. Independent scores put it below the frontier: 39 on the Artificial Analysis Intelligence Index, #23 on LMArena WebDev, at about 199 output tokens per second. DeepSeek reports 74.2% on DeepSWE v1.1 and 31.2% on Terminal-Bench 4.0. DeepSeek's API now serves V4 Flash requests with V4.1 Flash, and charges half price outside its peak hours.

Sources: DeepSeek announcement · Hugging Face · Artificial Analysis · OpenCode usage

Agents that run DeepSeek V4.1 Flash well

Cheap, high-volume open-weight agent work.

DeepSeek V4.1 Flash FAQ

How much does DeepSeek V4.1 Flash cost per coding-agent request?
$0.0067 on average at list price, $0.67 per 100 requests, and $0.091 for a median 16-request session. That is 79,301 real coding-agent requests (Sep 13 to Oct 12, 2026) priced at DeepSeek's list rates; the median request sent 99,534 input tokens, 87% of input was read from cache, and requests returned 698 output tokens on average.
Does DeepSeek V4.1 Flash charge more for long prompts?
No. DeepSeek V4.1 Flash bills the same rate per token up to its 1M-token context window.
Is DeepSeek V4.1 Flash good for AI agents?
Cheap, high-volume open-weight agent work. On our editorial scoring it rates 8.8/10 for agentic ability and 8.8/10 for output quality. Open weights under the MIT license.
What is DeepSeek V4.1 Flash's context window?
DeepSeek V4.1 Flash has a 1.0M-token context window — large enough to hold sizeable codebases or document sets in a single run. DeepSeek is the maker.
Is DeepSeek V4.1 Flash open source?
Yes — DeepSeek V4.1 Flash ships with open weights, so you can self-host it for privacy or run it through a hosted provider like OpenRouter. That openness is a big reason it's popular in open agent stacks.
What are the downsides of DeepSeek V4.1 Flash?
The main trade-offs: Well below the frontier on long agentic tasks; DeepSeek API prices differ between peak and off-peak hours. It's strongest for cheap, high-volume open-weight agent work.

DeepSeek V4.1 Flash compared

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