Monthly cost at list price for five common workloads. Token counts per unit are stated so you can scale them to your own traffic. A workload that does not fit a model's context window is marked rather than priced.
Workload (per month)
DeepSeek: DeepSeek V4 Flash Vision Exp
Moondream: Moondream 3.1
Difference
Customer-support chatbot
50,000 conversations — each a 6-turn conversation (1,500 in / 400 out tokens)
Moondream: Moondream 3.1: price unchanged since we started tracking it on 2026-10-16.
Date
Model
Input / 1M
Output / 1M
2026-09-29
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.22
$0.65
2026-09-28
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.44
$1.32
2026-09-27
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.22
$0.65
2026-09-21
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.22
$0.66
2026-09-18
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.22
$0.65
2026-09-09
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.22
$0.66
2026-09-07
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.44
$1.32
2026-09-05
DeepSeek: DeepSeek V4 Flash Vision Exp
$0.22
$0.66
Which should you choose?
Choose DeepSeek: DeepSeek V4 Flash Vision Exp if…
cost matters at scale — it is 62% cheaper on a typical 3:1 input/output mix ($29.11 vs $72.50 a month for 50,000 support chats)
you need to fit long inputs in one request — 1.0M tokens is roughly 1,573 pages, against 48
you need tool / function calling — to call your APIs and run agent loops; Moondream: Moondream 3.1 does not advertise it
you need structured output (JSON schema) — to return JSON that validates against your schema; Moondream: Moondream 3.1 does not advertise it
you need seed (reproducible sampling) — to repeat a generation for tests and evals; Moondream: Moondream 3.1 does not advertise it
you need log-probabilities — to read token confidence for classification and scoring; Moondream: Moondream 3.1 does not advertise it
you generate long outputs in one go — up to 262K tokens (about 196,600 words) per response
Choose Moondream: Moondream 3.1 if…
No advantage on the data we track — pick it for provider preference or output quality on your own prompts.
Frequently asked questions
Is DeepSeek: DeepSeek V4 Flash Vision Exp better than Moondream: Moondream 3.1?
DeepSeek: DeepSeek V4 Flash Vision Exp comes out ahead on the data we track: 7 advantages and none for Moondream: Moondream 3.1.
Which is cheaper, DeepSeek: DeepSeek V4 Flash Vision Exp or Moondream: Moondream 3.1?
DeepSeek: DeepSeek V4 Flash Vision Exp is cheaper: $0.32 vs $0.85 per 1M tokens at a typical 3:1 input/output mix, 62% less. For 50,000 support conversations a month that is $29.11 against $72.50.
How much do DeepSeek: DeepSeek V4 Flash Vision Exp and Moondream: Moondream 3.1 cost per million tokens?
DeepSeek: DeepSeek V4 Flash Vision Exp costs $0.22 per 1M input tokens and $0.65 per 1M output tokens; Moondream: Moondream 3.1 costs $0.30 input and $2.50 output. Output tokens are billed separately, so long answers shift the gap.
Which has the bigger context window, DeepSeek: DeepSeek V4 Flash Vision Exp or Moondream: Moondream 3.1?
DeepSeek: DeepSeek V4 Flash Vision Exp: 1.0M tokens, about 1,573 pages, against 32K (about 48 pages) for Moondream: Moondream 3.1.
Do DeepSeek: DeepSeek V4 Flash Vision Exp and Moondream: Moondream 3.1 support function calling and JSON output?
Can DeepSeek: DeepSeek V4 Flash Vision Exp or Moondream: Moondream 3.1 read images?
Yes, both accept image input.
Is DeepSeek: DeepSeek V4 Flash Vision Exp or Moondream: Moondream 3.1 free to use?
No free variant is listed for either; both are pay-per-token.
What is the maximum output length of DeepSeek: DeepSeek V4 Flash Vision Exp and Moondream: Moondream 3.1?
DeepSeek: DeepSeek V4 Flash Vision Exp can write up to 262K tokens (about 196,600 words) per response; Moondream: Moondream 3.1 up to 4K (about 3,100 words).
When were DeepSeek: DeepSeek V4 Flash Vision Exp and Moondream: Moondream 3.1 released?
DeepSeek: DeepSeek V4 Flash Vision Exp was listed on 2026-08-21; Moondream: Moondream 3.1 on 2026-10-15.
Has the price of DeepSeek: DeepSeek V4 Flash Vision Exp or Moondream: Moondream 3.1 changed?
DeepSeek: DeepSeek V4 Flash Vision Exp: input price cut 51% ($0.44 → $0.22/1M), output price cut 51% ($1.32 → $0.65/1M) on 2026-09-29 (12 price changes since 2026-08-22). Moondream: Moondream 3.1: price unchanged since we started tracking it on 2026-10-16.
DeepSeek V4 Flash Vision Exp is an experimental vision-enabled version of [DeepSeek V4 Flash 0731](https://openrouter.ai/deepseek/deepseek-v4-flash-0731) from DeepSeek, adding image understanding while matching the base model on text capabilities including agents,...
Moondream 3.1 is a vision-language model from Moondream, the successor to Moondream 3 Preview, with 9B total parameters and 2B active (mixture-of-experts). It handles visual question answering, captioning, OCR, and...