Gemini 3.1 Pro Preview vs GPT-5.6 Terra
Prices checked
Gemini 3.1 Pro Preview and GPT-5.6 Terra split the 5 rounds this table counts: the maker's two prices, the cheapest price, the maker's blended price and context. The weighting you pick decides the rest.
GoogleGemini 3.1 Pro Preview
1M context · tool calling · reads images
$2.25/M tokensCheapest price, at Kilo Gateway · $0.96 per 1,000 pages
OpenAIGPT-5.6 Terra
1.1M context · tool calling · reads images
$4.50/M tokensOpenAI's own price · $1.92 per 1,000 pages
Maker's price in (lower wins)
$2/M
$2/M
Maker's price out (lower wins)
$12/M
$12/M
Cheapest price (lower wins)
$2.25/M at Kilo Gateway
none below the maker
Maker's price, blended (lower wins)
$4.50/M
$4.50/M
Cost per 1,000 pages (lower wins)
$0.96
$1.92
Context
1M tokens
1.1M tokens
Open weights
no
no
Tool calling
yes
yes
Structured output
yes
yes
Reads images
yes
yes
Reasoning
yes
yes
Released
19 Feb 2026
9 Jul 2026
Providers selling it
44
49
Price we measure against
the maker's own
the maker's own
Trains on your prompts (no is better)
not published
no provider to check
Providers selling both · 33
Kilo Gateway$2.25 / $4.50
Jiekou$4.28 / $4.50
302.AI$4.50 / $4.50
Abacus$4.50 / $4.50- AI/ML API$4.50 / $4.50
AIHubMix$4.50 / $4.50
Atlas Cloud$4.50 / $4.50
Cloudflare AI Gateway$4.50 / $4.50
Gemini 3.1 Pro Preview, then GPT-5.6 Terra, per million tokens; the 8 cheapest of 33.
Go further
Add a third or fourth model, or change the weighting, in the tool.
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Frequently asked
- Which is cheaper, Gemini 3.1 Pro Preview or GPT-5.6 Terra?
- Gemini 3.1 Pro Preview, at $2.25 per million tokens against $4.50 for GPT-5.6 Terra, blended 3 in : 1 out, read on 31 Oct 2026.
- Where is each one cheapest?
- Gemini 3.1 Pro Preview: $2.25 at Kilo Gateway. GPT-5.6 Terra: nobody sells it below the maker's own price with a stated reason, so $4.50 is the number to beat.
- Can I buy both from one provider?
- Yes. 33 providers sell both: Kilo Gateway, Jiekou, 302.AI, Abacus, AI/ML API, AIHubMix, and more. The cheapest of them for the two together is Kilo Gateway.
- Which holds more context?
- GPT-5.6 Terra, at 1.1M tokens against 1M.
Prices exclude tax, read 31 Oct 2026 from each provider's own catalog. They are per M tokens, blended 3 in : 1 out, and a page is 600 tokens in and 60 out. Bars are scaled to the larger value in each row.
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