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Model comparison - Similar price, same tier

DeepSeek V4.1 Flash vs Mistral Small 4

DeepSeek V4.1 Flash is from DeepSeek and Mistral Small 4 is from Mistral AI. On list price, DeepSeek V4.1 Flash charges 2x Mistral Small 4's input price ($0.30 vs $0.15 per 1M tokens), and DeepSeek V4.1 Flash charges 2x Mistral Small 4's output price ($1.20 vs $0.60 per 1M tokens). DeepSeek V4.1 Flash has a 1,000,000-token context window and Mistral Small 4 256,000 tokens; DeepSeek V4.1 Flash returns up to 393,216 output tokens per response, and no primary source states a max output for Mistral Small 4. DeepSeek V4.1 Flash was released on September 10, 2026 and Mistral Small 4 on March 15, 2026. Both publish open weights.

Last verified from each provider's pricing page. All sources

DeepSeek - Open

DeepSeek V4.1 Flash
Input / 1M
$0.30
Output / 1M
$1.20
Context
1M

Mistral AI - Open

Mistral Small 4
Input / 1M
$0.15
Output / 1M
$0.60
Context
256K

Side-by-side specs

SpecDeepSeek V4.1 FlashMistral Small 4
ProviderDeepSeekMistral AI
Input / 1M tokens$0.30$0.15
Output / 1M tokens$1.20$0.60
Cache read / 1M$0.006$0.015
Batch input / 1M-$0.075
Batch output / 1M-$0.30
Context window1,000,000256,000
Max output393,216-
Release date
WeightsOpenOpen
LicenseMITApache 2.0
API model iddeepseek-flashmistral-small-2603
AI Gateway iddeepseek/deepseek-v4.1-flash-1017mistral/mistral-small
Last verified

Prices in USD per 1M tokens at each provider's standard first-party rate. A dash means the provider does not bill that item separately or no primary page states it.

What each costs in practice

The same three workloads every model page uses, worked from each model's standard list rates. Swap in your own token counts with the math on each model's page.

WorkloadDeepSeek V4.1 FlashMistral Small 4
One agent session1M input tokens and 100K output tokens, no caching.$0.42$0.21
A chat app10,000 requests a day at 2K input and 500 output tokens each.$12.00$360.00 per 30-day month$6.00$180.00 per 30-day month
The same session at a 90% cache hit90% of the input is read from the prompt cache. The one-time cache write premium is not included.$0.1554$0.0885
Show the math

DeepSeek V4.1 Flash

  • One agent sessionInput: 1M x $0.30 = $0.30Output: 0.1M x $1.20 = $0.12
  • A chat appInput: 20M x $0.30 = $6.00Output: 5M x $1.20 = $6.00
  • The same session at a 90% cache hitCached input: 0.9M x $0.006 = $0.0054Uncached input: 0.1M x $0.30 = $0.03Output: 0.1M x $1.20 = $0.12

Mistral Small 4

  • One agent sessionInput: 1M x $0.15 = $0.15Output: 0.1M x $0.60 = $0.06
  • A chat appInput: 20M x $0.15 = $3.00Output: 5M x $0.60 = $3.00
  • The same session at a 90% cache hitCached input: 0.9M x $0.015 = $0.0135Uncached input: 0.1M x $0.15 = $0.015Output: 0.1M x $0.60 = $0.06

Benchmarks under the same setting

No board in the benchmark directory lists both DeepSeek V4.1 Flash and Mistral Small 4 under the same setting, so there is no like-for-like score to show here.

Set them up in your tools

Step-by-step guides whose official docs list DeepSeek V4.1 Flash or Mistral Small 4 by model id.

Model pages

DeepSeekDeepSeek V4.1 Flash pricing and specsFull rate card, worked cost examples and sources. Open weights.Mistral AIMistral Small 4 pricing and specsFull rate card, worked cost examples and sources. Open weights.

FAQ

How do DeepSeek V4.1 Flash and Mistral Small 4 compare on price?

On list price, DeepSeek V4.1 Flash charges 2x Mistral Small 4's input price ($0.30 vs $0.15 per 1M tokens), and DeepSeek V4.1 Flash charges 2x Mistral Small 4's output price ($1.20 vs $0.60 per 1M tokens). For one agent session of 1M input and 100K output tokens with no caching, that is $0.42 on DeepSeek V4.1 Flash and $0.21 on Mistral Small 4. Prices are each provider's first-party list rates, verified October 17, 2026 and October 17, 2026.

What are the context windows of DeepSeek V4.1 Flash and Mistral Small 4?

DeepSeek V4.1 Flash has a 1,000,000-token context window and Mistral Small 4 256,000 tokens; DeepSeek V4.1 Flash returns up to 393,216 output tokens per response, and no primary source states a max output for Mistral Small 4.

Are DeepSeek V4.1 Flash and Mistral Small 4 open weights?

DeepSeek V4.1 Flash's weights are published at huggingface.co under the MIT. Mistral Small 4's weights are published at huggingface.co under the Apache 2.0.

More comparisons

Sources

DeepSeek V4.1 Flash verified from api-docs.deepseek.com; Mistral Small 4 verified from docs.mistral.ai. This page is as current as the older of the two: .

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