GPT-6.1 Sol Max vs Kimi K3.1 Pro: which responds faster?

GPT-6.1 Sol Max leads the intelligence index 54.6 to 46.5. GPT-6.1 Sol Max writes 2.2 times as fast. Price per token, response speed and when to pick each.

Metric	GPT-6.1 Sol (Max)	Kimi K3.1 Pro
Intelligence Index	54.6	46.5
Input price (per 1M tokens)	$2.00	$2.00
Output price (per 1M tokens)	$10.00	$10.00
Output speed (tokens/s)	60	27
Time to first token	5.4 min	3.0s
Release date	2026-09-29	2026-10-23

Metric

GPT-6.1 Sol (Max)

Kimi K3.1 Pro

Intelligence Index

54.6

46.5

Input price (per 1M tokens)

$2.00

Output price (per 1M tokens)

$10.00

Output speed (tokens/s)

Time to first token

5.4 min

3.0s

Release date

2026-09-29

2026-10-23

This comparison puts OpenAI's GPT-6.1 Sol (Max) next to Kimi's Kimi K3.1 Pro. What separates them most is responsiveness; GPT-6.1 Sol Max takes 5.4 minutes to produce its first token, Kimi K3.1 Pro 3.0 seconds. The figures come from tracked catalogue data, not from our own testing, so treat them as a starting point for a trial on your tasks.

How fast they respond

Once a response is under way, GPT-6.1 Sol Max produces roughly 60 tokens per second against 27 tokens per second for Kimi K3.1 Pro. That makes GPT-6.1 Sol Max roughly 2.2 times as fast at writing. The wait for the first token averages 5.4 minutes on GPT-6.1 Sol Max against 3.0 seconds on Kimi K3.1 Pro. On total time, Kimi K3.1 Pro wins at ordinary lengths; GPT-6.1 Sol Max's higher throughput only pays off beyond about 16,000 tokens. Waits that long are felt on every chat-style request, though they matter less for batch jobs.

Add the two numbers up for a 1,000-token reply and Kimi K3.1 Pro finishes first: 5.7 minutes for GPT-6.1 Sol Max, 40 seconds for Kimi K3.1 Pro.

How the intelligence index compares

GPT-6.1 Sol Max records 54.6 on the intelligence index and Kimi K3.1 Pro records 46.5. That is a wide gap for an aggregate score. Put another way, Kimi K3.1 Pro would need 17% more on this index to draw level.

For context, that places GPT-6.1 Sol Max 8th and Kimi K3.1 Pro 23rd out of 109 scored models still on offer.

The catalogue does not yet split either model's score into coding and math indexes.

When they came out

Kimi K3.1 Pro arrived on October 23, 2026, 24 days after GPT-6.1 Sol Max (September 29, 2026). They are effectively contemporaries.

Pricing: no difference

Per million tokens, GPT-6.1 Sol Max charges $2.00 for input and $10.00 for output, while Kimi K3.1 Pro charges $2.00 and $10.00. The rates are identical, so price will not separate them.

Is the price in proportion?

A blunt value measure, blended price over intelligence score, puts GPT-6.1 Sol Max at $0.073 and Kimi K3.1 Pro at $0.086 per point. With the higher score and the lower cost per point, GPT-6.1 Sol Max is the better value per point on these numbers.

Frequently asked questions

Is GPT-6.1 Sol Max better than Kimi K3.1 Pro?

It depends on what you need: GPT-6.1 Sol Max scores higher on the intelligence index, 54.6 to 46.5; their blended prices are about the same; GPT-6.1 Sol Max streams output 2.2 times as fast; and Kimi K3.1 Pro reaches its first token sooner.

Which is newer, GPT-6.1 Sol Max or Kimi K3.1 Pro?

Kimi K3.1 Pro is newer. It was released on October 23, 2026, 24 days after GPT-6.1 Sol Max (September 29, 2026).

Who makes GPT-6.1 Sol Max and Kimi K3.1 Pro?

GPT-6.1 Sol Max is made by OpenAI and Kimi K3.1 Pro by Kimi. GPT-6.1 Sol Max was released on September 29, 2026 and Kimi K3.1 Pro on October 23, 2026.

Is Kimi K3.1 Pro cheaper than GPT-6.1 Sol Max?

They cost about the same. GPT-6.1 Sol Max lists $2.00 in and $10.00 out per million tokens, and Kimi K3.1 Pro lists $2.00 and $10.00.

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.

Final whistle

Kimi K3.1 Pro has more going for it here, but GPT-6.1 Sol Max is not without an argument. Pick Kimi K3.1 Pro if users are waiting on the first word and replies need to finish sooner at typical lengths. Pick GPT-6.1 Sol Max if you need the higher overall score (54.6 against 46.5) and you generate very long outputs, beyond about 16,000 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 GPT-6.1 Sol (Max) and Kimi K3.1 Pro pages. The AI Benchmark methodology explains how that data is collected and shown.