Which is cheaper, gpt-oss-20b or Mistral Small 3?

gpt-oss-20b, at $0.16 per million tokens against $0.23 for Mistral Small 3, three parts input to one part output, read on 16 Sept 2026.

Where is each one cheapest?

gpt-oss-20b: $0.16 at Kilo Gateway. Mistral Small 3: nobody goes below OpenRouter's own price with a reason we can point at, so $0.23 is the number to beat.

Can I buy both from one provider?

Yes. 9 providers sell both: Kilo Gateway, TrustedRouter, OpenRouter, DeepInfra, FastRouter, Eden AI, and more. The cheapest of them for the two together is Kilo Gateway.

Which holds more context?

gpt-oss-20b, at 131k tokens against 33k.

gpt-oss-20b vs Mistral Small 3.

model vs model · prices as of 16 Sept 2026

gpt-oss-20b takes 4 of 5 rounds against Mistral Small 3. It is also the cheaper of the two to run, at $0.16 per million tokens against $0.23.

OpenAIwins 4 rounds

gpt-oss-20b

$0.16/M tokens

cheapest we can explain, at Kilo Gateway · $0.018 per 1,000 pages

131k context · tool calling · open weights

Kilo Gateway ↗

Mistral AI

Mistral Small 3

$0.23/M tokens

OpenRouter list price, nothing below it is accounted for · $0.0348 per 1,000 pages

33k context · open weights

List price in (lower wins)

$0.03/M

$0.05/M

List price out (lower wins)

$0.13/M

$0.08/M

Cheapest we can explain (lower wins)

$0.16/M at Kilo Gateway

none below list

Standard price (lower wins)

$0.22/M

$0.23/M

Cost per 1,000 pages (lower wins)

$0.018

$0.0348

Context

131k tokens

33k tokens

Open weights

yes

Tool calling

yes

Structured output

yes

Reads images

Reasoning

yes

Released

5 Aug 2025

30 Jan 2025

Providers selling it

Price we measure against

OpenRouter

Trains on your prompts (no is better)

not stated

no provider to check

Providers selling both · 9

Kilo Gateway$0.16 / $0.23
TrustedRouter$0.17 / $0.24
OpenRouter$0.22 / $0.23
DeepInfra$0.23 / $0.23
FastRouter$0.46 / $0.23
Eden AI$0.22 / $0.69
Together AI$0.35 / $0.60
NanoGPT$0.27 / $0.69

gpt-oss-20b then Mistral Small 3, per million tokens · showing the 8 cheapest of 9

Go further

open in the compare tool →every price for gpt-oss-20b every price for Mistral Small 3

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

What moved in the last seven days

gpt-oss-20bio.net Intelligence$0.06 / $0.21 $0.06 / $0.204% cheaper · 16 Sept 2026
gpt-oss-20bNous Portal$0.02 / $0.08 $0.02 / $0.1025% dearer · 16 Sept 2026
gpt-oss-20bRequesty$0.07 / $0.30 $0.10 / $0.5057% dearer · 16 Sept 2026
gpt-oss-20bTrustedRouter$0.03 / $0.14 $0.02 / $0.1127% cheaper · 16 Sept 2026
gpt-oss-20bNanoGPT$0.20 / $0.80 $0.04 / $0.1581% cheaper · 11 Sept 2026

Frequently asked

Which is cheaper, gpt-oss-20b or Mistral Small 3?: gpt-oss-20b, at $0.16 per million tokens against $0.23 for Mistral Small 3, three parts input to one part output, read on 16 Sept 2026.
Where is each one cheapest?: gpt-oss-20b: $0.16 at Kilo Gateway. Mistral Small 3: nobody goes below OpenRouter's own price with a reason we can point at, so $0.23 is the number to beat.
Can I buy both from one provider?: Yes. 9 providers sell both: Kilo Gateway, TrustedRouter, OpenRouter, DeepInfra, FastRouter, Eden AI, and more. The cheapest of them for the two together is Kilo Gateway.
Which holds more context?: gpt-oss-20b, at 131k tokens against 33k.

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.