Which is cheaper, Mistral Small 3.1 24B or Step 3.7 Flash?

Mistral Small 3.1 24B, at $0.60 per million tokens against $1.40 for Step 3.7 Flash, three parts input to one part output, read on 16 Sept 2026.

Where is each one cheapest?

Mistral Small 3.1 24B: $0.60 at NanoGPT. Step 3.7 Flash: $1.40 at Nous Portal.

Can I buy both from one provider?

Yes. 5 providers sell both: NanoGPT, Eden AI, Kilo Gateway, OpenRouter, TrustedRouter. The cheapest of them for the two together is NanoGPT.

Which holds more context?

Step 3.7 Flash, at 256k tokens against 128k.

Mistral Small 3.1 24B vs Step 3.7 Flash.

model vs model · prices as of 16 Sept 2026

Mistral Small 3.1 24B takes 3 of 5 rounds against Step 3.7 Flash. It is also the cheaper of the two to run, at $0.60 per million tokens against $1.40.

Mistral AIwins 3 rounds

Mistral Small 3.1 24B

$0.60/M tokens

cheapest we can explain, at NanoGPT · $0.078 per 1,000 pages

128k context · reads images · open weights

NanoGPT ↗

StepFun

Step 3.7 Flash

$1.40/M tokens

cheapest we can explain, at Nous Portal · $0.151 per 1,000 pages

256k context · tool calling · reads images · open weights

Nous Portal ↗

List price in (lower wins)

$0.35/M

$0.18/M

List price out (lower wins)

$0.56/M

$1.11/M

Cheapest we can explain (lower wins)

$0.60/M at NanoGPT

$1.40/M at Nous Portal

Standard price (lower wins)

$1.61/M

$1.67/M

Cost per 1,000 pages (lower wins)

$0.078

$0.151

Context

128k tokens

256k tokens

Open weights

yes

Tool calling

yes

Structured output

not stated

Reads images

yes

Reasoning

yes

Released

17 Mar 2025

29 May 2026

Providers selling it

Price we measure against

OpenRouter

the maker's own

Trains on your prompts (no is better)

not stated

Providers selling both · 5

NanoGPT$0.60 / $1.75
Eden AI$1.61 / $1.75
Kilo Gateway$1.61 / $1.75
OpenRouter$1.61 / $1.75
TrustedRouter$1.70 / $1.85

Mistral Small 3.1 24B then Step 3.7 Flash, per million tokens

Go further

open in the compare tool →every price for Mistral Small 3.1 24B every price for Step 3.7 Flash

Add a third or fourth model, or switch the weighting, in the tool.

What moved in the last seven days

Step 3.7 FlashNous Portal$0.13 / $0.74 $0.16 / $0.9225% dearer · 16 Sept 2026

Frequently asked

Which is cheaper, Mistral Small 3.1 24B or Step 3.7 Flash?: Mistral Small 3.1 24B, at $0.60 per million tokens against $1.40 for Step 3.7 Flash, three parts input to one part output, read on 16 Sept 2026.
Where is each one cheapest?: Mistral Small 3.1 24B: $0.60 at NanoGPT. Step 3.7 Flash: $1.40 at Nous Portal.
Can I buy both from one provider?: Yes. 5 providers sell both: NanoGPT, Eden AI, Kilo Gateway, OpenRouter, TrustedRouter. The cheapest of them for the two together is NanoGPT.
Which holds more context?: Step 3.7 Flash, at 256k tokens against 128k.

Prices exclude tax and are per million tokens, read 16 Sept 2026 from each provider's own catalog. The standard price blends three parts input to one part output; a page is 600 tokens in and 60 out. Bars are scaled to the larger value in each row.