Which is cheaper, Grok 4.20 or Grok 4.3?

Neither: both run at $6.25 per million tokens, three parts input to one part output, read on 16 Sept 2026.

Where is each one cheapest?

Grok 4.20: nobody goes below the maker's own price with a reason we can point at, so $6.25 is the number to beat. Grok 4.3: nobody goes below the maker's own price with a reason we can point at, so $6.25 is the number to beat.

Can I buy both from one provider?

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

Which holds more context?

Grok 4.20, at 2M tokens against 1M.

Grok 4.20 vs Grok 4.3.

model vs model · prices as of 16 Sept 2026

Grok 4.20 takes 1 of 5 rounds against Grok 4.3. Both cost $6.25 per million tokens to run.

xAIwins 1 rounds

Grok 4.20

$6.25/M tokens

xAI list price, nothing below it is accounted for · $0.90 per 1,000 pages

2M context · tool calling · reads images

xAI

Grok 4.3

$6.25/M tokens

xAI list price, nothing below it is accounted for · $0.90 per 1,000 pages

1M context · tool calling · reads images

List price in (lower wins)

$1.25/M

List price out (lower wins)

$2.50/M

Cheapest we can explain (lower wins)

none below list

Standard price (lower wins)

$6.25/M

Cost per 1,000 pages (lower wins)

$0.90

Context

2M tokens

1M tokens

Open weights

not stated

Tool calling

yes

Structured output

yes

Reads images

yes

Reasoning

yes

Released

31 Mar 2026

17 Apr 2026

Providers selling it

Price we measure against

the maker's own

Trains on your prompts (no is better)

no provider to check

Providers selling both · 9

Eden AI$6.25 / $6.25
Kilo Gateway$6.25 / $6.25
Nous Portal$6.25 / $6.25
OpenRouter$6.25 / $6.25
xAI$6.25 / $6.25
TrustedRouter$6.59 / $6.59
Venice$7.09 / $7.09
NanoGPT$12 / $6.25

Grok 4.20 then Grok 4.3, per million tokens · showing the 8 cheapest of 9

Go further

open in the compare tool →every price for Grok 4.20 every price for Grok 4.3

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

What moved in the last seven days

Grok 4.20Nous Portal$1 / $2 $1.25 / $2.5025% dearer · 16 Sept 2026
Grok 4.3Nous Portal$1 / $2 $1.25 / $2.5025% dearer · 16 Sept 2026

Frequently asked

Which is cheaper, Grok 4.20 or Grok 4.3?: Neither: both run at $6.25 per million tokens, three parts input to one part output, read on 16 Sept 2026.
Where is each one cheapest?: Grok 4.20: nobody goes below the maker's own price with a reason we can point at, so $6.25 is the number to beat. Grok 4.3: nobody goes below the maker's own price with a reason we can point at, so $6.25 is the number to beat.
Can I buy both from one provider?: Yes. 9 providers sell both: Eden AI, Kilo Gateway, Nous Portal, OpenRouter, xAI, TrustedRouter, and more. The cheapest of them for the two together is Eden AI.
Which holds more context?: Grok 4.20, at 2M tokens against 1M.

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.