Gemini 3.5 Flash vs GPT-3.5 Turbo 16k.
model vs model · prices as of
Gemini 3.5 Flash takes 3 of 5 rounds against GPT-3.5 Turbo 16k. It is also the cheaper of the two to run, at $6.75 per million tokens against $13.
Googlewins 3 roundsGemini 3.5 Flash
$6.75/M tokens
cheapest we can explain, at Kilo Gateway · $0.72 per 1,000 pages
1M context · tool calling · reads images
OpenAIGPT-3.5 Turbo 16k
$13/M tokens
OpenAI list price, nothing below it is accounted for · $2.04 per 1,000 pages
16k context · tool calling
List price in (lower wins)
$1.50/M
$3/M
List price out (lower wins)
$9/M
$4/M
Cheapest we can explain (lower wins)
$6.75/M at Kilo Gateway
none below list
Standard price (lower wins)
$13.50/M
$13/M
Cost per 1,000 pages (lower wins)
$0.72
$2.04
Context
1M tokens
16k tokens
Open weights
no
not stated
Tool calling
yes
yes
Structured output
yes
yes
Reads images
yes
no
Reasoning
yes
no
Released
19 May 2026
28 Aug 2023
Providers selling it
39
7
Price we measure against
the maker's own
the maker's own
Trains on your prompts (no is better)
not stated
no provider to check
Providers selling both · 5
Kilo Gateway$6.75 / $13
Eden AI$13.50 / $13
FastRouter$13.50 / $13
Nous Portal$13.50 / $13
OpenRouter$13.50 / $13
Gemini 3.5 Flash then GPT-3.5 Turbo 16k, per million tokens
Go further
Add a third or fourth model, or switch the weighting, in the tool.
What moved in the last seven days
- Gemini 3.5 FlashNous Portal$1.20 / $7.20 $1.50 / $925% dearer ·
- GPT-3.5 Turbo 16kNous Portal$2.40 / $3.20 $3 / $425% dearer ·
- Gemini 3.5 Flash
Requesty$1.65 / $9.90 $1.50 / $99% cheaper ·
Frequently asked
- Which is cheaper, Gemini 3.5 Flash or GPT-3.5 Turbo 16k?
- Gemini 3.5 Flash, at $6.75 per million tokens against $13 for GPT-3.5 Turbo 16k, three parts input to one part output, read on 16 Sept 2026.
- Where is each one cheapest?
- Gemini 3.5 Flash: $6.75 at Kilo Gateway. GPT-3.5 Turbo 16k: nobody goes below the maker's own price with a reason we can point at, so $13 is the number to beat.
- Can I buy both from one provider?
- Yes. 5 providers sell both: Kilo Gateway, Eden AI, FastRouter, Nous Portal, OpenRouter. The cheapest of them for the two together is Kilo Gateway.
- Which holds more context?
- Gemini 3.5 Flash, at 1M tokens against 16k.
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.