Gemini 4 Carbon High vs Kimi K3.1 Pro compared

Gemini 4 Carbon High leads the intelligence index 60.0 to 46.5. Kimi K3.1 Pro costs 50% less on blended price. See token costs, speed and which to pick.

Metric	Gemini 4 Carbon (High)	Kimi K3.1 Pro
Intelligence Index	60.0	46.5
Input price (per 1M tokens)	$4.00	$2.00
Output price (per 1M tokens)	$20.00	$10.00
Output speed (tokens/s)	91	27
Time to first token	2.0 min	3.0s
Release date	2026-10-28	2026-10-23

Metric

Gemini 4 Carbon (High)

Kimi K3.1 Pro

Intelligence Index

60.0

46.5

Input price (per 1M tokens)

$4.00

$2.00

Output price (per 1M tokens)

$20.00

$10.00

Output speed (tokens/s)

Time to first token

2.0 min

3.0s

Release date

2026-10-28

2026-10-23

Gemini 4 Carbon (High) (Google) and Kimi K3.1 Pro (Kimi) are not peers on the headline index, which makes the trade-offs the interesting part. No hands-on testing went into this write-up; it summarises the recorded benchmark, price and speed data for both models. The headline gap is on the intelligence index, where Gemini 4 Carbon High scores 60.0 and Kimi K3.1 Pro 46.5.

Overall capability: 13.5 points apart

Gemini 4 Carbon High comes out ahead on the intelligence index, 60.0 to 46.5. That is a wide gap for an aggregate score.

Among 109 active scored models, Gemini 4 Carbon High sits 1st and Kimi K3.1 Pro 23rd.

There are no coding or math index scores for either model in the catalogue, which keeps this comparison at the aggregate level.

Token pricing and a sample bill

Per million tokens, Gemini 4 Carbon High charges $4.00 for input and $20.00 for output, while Kimi K3.1 Pro charges $2.00 and $10.00. For output tokens, Gemini 4 Carbon High is twice the price of Kimi K3.1 Pro.

Take 1 million input tokens and 200,000 output tokens: that comes to $8.00 on Gemini 4 Carbon High and $4.00 on Kimi K3.1 Pro. A bigger example, a month of coding-assistant traffic at 30 million input and 3 million output tokens, costs $180 on Gemini 4 Carbon High and $90.00 on Kimi K3.1 Pro: a gap of $90.00.

Throughput and time to first token

Gemini 4 Carbon High generates about 91 tokens per second and Kimi K3.1 Pro about 27 tokens per second. On outputs beyond about 4,500 tokens, that is a real advantage for Gemini 4 Carbon High. Before any text appears, Gemini 4 Carbon High takes 2.0 minutes and Kimi K3.1 Pro 3.0 seconds. So the two pull in opposite directions, with Kimi K3.1 Pro quicker off the mark and Gemini 4 Carbon High quicker once it gets going; the crossover is around 4,500 tokens. Waits that long are felt on every chat-style request, though they matter less for batch jobs.

Put together, a 400-token answer would take about 2.1 minutes from Gemini 4 Carbon High and 18 seconds from Kimi K3.1 Pro, counting the first-token wait.

Score per dollar

Per point of intelligence index, Gemini 4 Carbon High costs $0.13 of blended price per million tokens and Kimi K3.1 Pro $0.086. So Gemini 4 Carbon High buys its higher score at a premium, while Kimi K3.1 Pro is the value pick, paying 35% less per point.

When they came out

Kimi K3.1 Pro came first, on October 23, 2026; Gemini 4 Carbon High followed on October 28, 2026. That is close enough to count them as the same generation.

Common questions about Gemini 4 Carbon High and Kimi K3.1 Pro

Is Gemini 4 Carbon High better than Kimi K3.1 Pro?

Neither wins everywhere: Gemini 4 Carbon High scores higher on the intelligence index, 60.0 to 46.5; Kimi K3.1 Pro is 50% cheaper on blended price; Gemini 4 Carbon High streams output 3.4 times as fast; and Kimi K3.1 Pro reaches its first token sooner.

Does Gemini 4 Carbon High respond faster than Kimi K3.1 Pro?

Gemini 4 Carbon High generates output faster, at 91 tokens per second against 27 tokens per second. Kimi K3.1 Pro reaches its first token sooner (3.0 seconds against 2.0 minutes). Counting the first-token wait, Kimi K3.1 Pro finishes short replies first and Gemini 4 Carbon High pulls ahead beyond about 4,500 tokens.

Was this comparison tested by hand?

The figures are the recorded benchmark, price and speed data in Franklin AI's model catalogue. This page is written from that data automatically; neither model was tested by hand for it.

Which is cheaper, Gemini 4 Carbon High or Kimi K3.1 Pro?

Kimi K3.1 Pro is cheaper on a blended basis. Gemini 4 Carbon High lists $4.00 per million input tokens and $20.00 per million output tokens; Kimi K3.1 Pro lists $2.00 and $10.00. For 1 million input and 200,000 output tokens that is $8.00 against $4.00.

Are Gemini 4 Carbon High and Kimi K3.1 Pro from the same company?

Gemini 4 Carbon High is made by Google and Kimi K3.1 Pro by Kimi. Gemini 4 Carbon High was released on October 28, 2026 and Kimi K3.1 Pro on October 23, 2026.

Final whistle

The verdict: Gemini 4 Carbon High has more going for it here, but Kimi K3.1 Pro is not without an argument. Pick Gemini 4 Carbon High if you need the higher overall score (60.0 against 46.5) and your outputs often run past about 4,500 tokens. Pick Kimi K3.1 Pro if users are waiting on the first word and cost matters ($10.00 against $20.00 per million output tokens).

Where the numbers come from

The scores, speed and prices in this comparison come from independent third-party model evaluations that Franklin AI syncs each day, and the article was written from a snapshot of them. For the latest results, open the Gemini 4 Carbon (High) and Kimi K3.1 Pro pages. The AI Benchmark methodology explains how that data is collected and shown.