Which is cheaper, Gemini 3.1 Flash Live Preview or GPT-5.4 mini?

GPT-5.4 mini, at $6.14 per million tokens against $6.75 for Gemini 3.1 Flash Live Preview, three parts input to one part output, read on 16 Sept 2026.

Where is each one cheapest?

Gemini 3.1 Flash Live Preview: nobody goes below the maker's own price with a reason we can point at, so $6.75 is the number to beat. GPT-5.4 mini: $6.14 at Poe.

Can I buy both from one provider?

Yes. 2 providers sell both: LLM Gateway, LLMTR. The cheapest of them for the two together is LLM Gateway.

Which holds more context?

GPT-5.4 mini, at 400k tokens against 131k.

Gemini 3.1 Flash Live Preview vs GPT-5.4 mini.

model vs model · prices as of 16 Sept 2026

GPT-5.4 mini takes 2 of 5 rounds against Gemini 3.1 Flash Live Preview. It is also the cheaper of the two to run, at $6.14 per million tokens against $6.75.

Google

Gemini 3.1 Flash Live Preview

$6.75/M tokens

Google list price, nothing below it is accounted for · $0.72 per 1,000 pages

131k context · tool calling · reads images

OpenAIwins 2 rounds

GPT-5.4 mini

$6.14/M tokens

cheapest we can explain, at Poe · $0.655 per 1,000 pages

400k context · tool calling · reads images

Poe ↗

List price in (lower wins)

$0.75/M

List price out (lower wins)

$4.50/M

Cheapest we can explain (lower wins)

none below list

$6.14/M at Poe

Standard price (lower wins)

$6.75/M

Cost per 1,000 pages (lower wins)

$0.72

$0.655

Context

131k tokens

400k tokens

Open weights

Tool calling

yes

Structured output

yes

Reads images

yes

Reasoning

yes

Released

26 Mar 2026

17 Mar 2026

Providers selling it

Price we measure against

the maker's own

Trains on your prompts (no is better)

no provider to check

not stated

Providers selling both · 2

LLM Gateway$6.75 / $6.75
LLMTR$6.75 / $6.75

Gemini 3.1 Flash Live Preview then GPT-5.4 mini, per million tokens

Go further

open in the compare tool →every price for Gemini 3.1 Flash Live Preview every price for GPT-5.4 mini

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

What moved in the last seven days

GPT-5.4 miniNous Portal$0.60 / $3.60 $0.75 / $4.5025% dearer · 16 Sept 2026

Frequently asked

Which is cheaper, Gemini 3.1 Flash Live Preview or GPT-5.4 mini?: GPT-5.4 mini, at $6.14 per million tokens against $6.75 for Gemini 3.1 Flash Live Preview, three parts input to one part output, read on 16 Sept 2026.
Where is each one cheapest?: Gemini 3.1 Flash Live Preview: nobody goes below the maker's own price with a reason we can point at, so $6.75 is the number to beat. GPT-5.4 mini: $6.14 at Poe.
Can I buy both from one provider?: Yes. 2 providers sell both: LLM Gateway, LLMTR. The cheapest of them for the two together is LLM Gateway.
Which holds more context?: GPT-5.4 mini, at 400k tokens against 131k.

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.