DeepSeek

DeepSeek V4.1 Flash API pricing.

DeepSeek V4.1 Flash is DeepSeek’s model on the API market, released 10 Sept 2026. Prices are per million tokens in USD, as last read from the price list.

$0.045Input / 1M
$0.50Output / 1M
1.0MContext
944KMax output
Capability scores
Epoch AI
Maths3 of 4 benchmarks64
Science and knowledge2 of 2 benchmarks65
CodingNot tested by Epoch
Reasoning and puzzles2 of 2 benchmarks41
Agents and long tasks1 of 3 benchmarks6

Each bar is this model's score in that area. The white tick marks the best score any model Epoch has tested reaches there.

Epoch Capabilities Index
156
Range 154 to 158 · #34 of 271 models Epoch has scored
Maths
64average of 3 of 4 Epoch results
FrontierMath (tiers 1 to 3) (max)67%
FrontierMath (tier 4) (max)27%
OTIS Mock AIME (max)98%
Science and knowledge
65average of 2 of 2 Epoch results
GPQA Diamond (max)90%
SimpleQA Verified (max)43%
Reasoning and puzzles
41average of 2 of 2 Epoch results
Chess puzzles (max)48%
Mystery game puzzles (max)43%
Agents and long tasks
6average of 1 of 3 Epoch results
Furniture assembly (max)34%

The index combines many benchmarks into one general-capability score; the range is how sure Epoch is of the number. Each area score is this site's average of the model's Epoch results in that area, where 0 is what guessing would score and 100 is perfect. Compare every model, and value for money →

Source: Epoch AI, Capabilities & benchmarking (licensed CC BY 4.0). Data refreshed 2 November 2026. These are Epoch's own tests; other benchmark sites can rank models differently.

Cheaper models that come close
Our working on Epoch's index
  1. GLM-5.3-Flash · Z.ai (Zhipu AI)index 153.22 (3 below) · 72% cheaper
  2. DeepSeek V4 Flash 0731 · DeepSeekindex 154.94 (1 below) · 6% cheaper

Models within 5 points of DeepSeek V4.1 Flash on Epoch's Capabilities Index that cost less, comparing a typical chat mix (three parts input to one part output). A few points of index is a small difference and says nothing about your task: a place to start testing, not a verdict. Capability against price for every model.

Specification
USD per million tokens
Provider
DeepSeek
Model id
deepseek/deepseek-v4.1-flash
Input
$0.045
Output
$0.50
Cached input
$0.006
Context window
1.0M tokens
Maximum output
944K tokens
Takes
text, image
Returns
text
Tool use
Yes
Reasoning
Yes
Released
10 Sept 2026
First tracked
17 Sept 2026

At $0.045 per million input tokens, DeepSeek V4.1 Flash is dearer than 18 of the 340 models on the price list.

Price changes
Tracked since 17 Sept 2026

No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.

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Other entries for this model
More from DeepSeek
Cheapest input first
  1. DeepSeek V4 Flash 0423$0.091 in · $0.18 out
  2. DeepSeek V4 Pro 0813$0.12 in · $4.00 out
  3. DeepSeek V4 Flash 0731$0.12 in · $0.24 out
  4. DeepSeek V4.1 Flash 1017$0.15 in · $0.60 out
  5. DeepSeek V4 Flash Vision Exp$0.22 in · $0.65 out
  6. DeepSeek V3.1$0.25 in · $0.95 out
  7. DeepSeek V3$0.26 in · $1.03 out
  8. DeepSeek V3.2$0.26 in · $0.38 out

Prices and specifications come from OpenRouter’s catalogue, last read 2 Nov 2026. A provider’s own price may differ; how this is collected.