GPT-6 Astra Max vs Kimi K3.1 Pro: which responds faster?

GPT-6 Astra Max leads the intelligence index 56.9 to 46.5. Kimi K3.1 Pro costs 80% less on blended price. See token costs, speed and which to pick.

Metric	GPT-6 Astra (Max)	Kimi K3.1 Pro
Intelligence Index	56.9	46.5
Input price (per 1M tokens)	$10.00	$2.00
Output price (per 1M tokens)	$50.00	$10.00
Output speed (tokens/s)	46	27
Time to first token	6.8 min	3.0s
Release date	2026-09-03	2026-10-23

Metric

GPT-6 Astra (Max)

Kimi K3.1 Pro

Intelligence Index

56.9

46.5

Input price (per 1M tokens)

$10.00

$2.00

Output price (per 1M tokens)

$50.00

$10.00

Output speed (tokens/s)

Time to first token

6.8 min

3.0s

Release date

2026-09-03

2026-10-23

This comparison puts OpenAI's GPT-6 Astra (Max) next to Kimi's Kimi K3.1 Pro. The widest gap is the wait for the first token: 3.0 seconds for Kimi K3.1 Pro against 6.8 minutes for GPT-6 Astra Max. All numbers are the catalogue's recorded values; nobody ran either model by hand for this page.

How fast they respond

GPT-6 Astra Max generates about 46 tokens per second and Kimi K3.1 Pro about 27 tokens per second. That makes GPT-6 Astra Max roughly 1.7 times as fast at writing. The wait for the first token averages 6.8 minutes on GPT-6 Astra Max against 3.0 seconds on Kimi K3.1 Pro. GPT-6 Astra Max writes faster once it starts, but Kimi K3.1 Pro's head start is large enough that Kimi K3.1 Pro still finishes first at any typical reply length; GPT-6 Astra Max only catches up beyond about 26,000 tokens. A first-token wait of that length suits background work better than live conversation.

For a 1,500-token response, first token plus generation comes to roughly 7.3 minutes on GPT-6 Astra Max and 59 seconds on Kimi K3.1 Pro.

What they cost

GPT-6 Astra Max lists $10.00 per million input tokens and $50.00 per million output tokens; Kimi K3.1 Pro lists $2.00 and $10.00. GPT-6 Astra Max costs 5 times as much per output token.

For a sample workload of 1 million input tokens and 200,000 output tokens, GPT-6 Astra Max would cost $20.00 and Kimi K3.1 Pro $4.00, a difference of $16.00. Scale it up to summarising 1,000 documents of 8,000 tokens into 400-token summaries and the bill is $100 for GPT-6 Astra Max against $20.00 for Kimi K3.1 Pro. Blended at three input tokens per output token, the effective rates are $20.00 for GPT-6 Astra Max and $4.00 for Kimi K3.1 Pro.

Which is newer

Kimi K3.1 Pro arrived on October 23, 2026, about 2 months after GPT-6 Astra Max (September 3, 2026).

Reasoning and overall scores

The catalogue puts GPT-6 Astra Max at 56.9 and Kimi K3.1 Pro at 46.5 on its intelligence index. A difference this size usually separates one tier of model from the next.

For context, that places GPT-6 Astra Max 5th and Kimi K3.1 Pro 23rd out of 109 scored models still on offer.

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

Score per dollar

A blunt value measure, blended price over intelligence score, puts GPT-6 Astra Max at $0.35 and Kimi K3.1 Pro at $0.086 per point. GPT-6 Astra Max costs 4.1 times as much per point, which is the price of its lead.

FAQ

Is GPT-6 Astra Max better than Kimi K3.1 Pro?

Not across the board: GPT-6 Astra Max scores higher on the intelligence index, 56.9 to 46.5; Kimi K3.1 Pro is 80% cheaper on blended price; GPT-6 Astra Max streams output 1.7 times as fast; and Kimi K3.1 Pro reaches its first token sooner.

How much do GPT-6 Astra Max and Kimi K3.1 Pro cost?

Kimi K3.1 Pro is cheaper on a blended basis. GPT-6 Astra Max lists $10.00 per million input tokens and $50.00 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 $20.00 against $4.00.

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.

Who makes GPT-6 Astra Max and Kimi K3.1 Pro?

GPT-6 Astra Max is made by OpenAI and Kimi K3.1 Pro by Kimi. GPT-6 Astra Max was released on September 3, 2026 and Kimi K3.1 Pro on October 23, 2026.

Does GPT-6 Astra Max respond faster than Kimi K3.1 Pro?

GPT-6 Astra Max generates output faster, at 46 tokens per second against 27 tokens per second. Kimi K3.1 Pro reaches its first token sooner (3.0 seconds against 6.8 minutes). Counting the first-token wait, Kimi K3.1 Pro finishes first for any reply shorter than about 26,000 tokens.

Final whistle

Kimi K3.1 Pro is the stronger all-round pick on this data, while GPT-6 Astra Max makes sense in narrower cases. Pick Kimi K3.1 Pro if users are waiting on the first word and cost matters ($10.00 against $50.00 per million output tokens). Pick GPT-6 Astra Max if you need the higher overall score (56.9 against 46.5) and you generate very long outputs, beyond about 26,000 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 Astra (Max) and Kimi K3.1 Pro pages. The AI Benchmark methodology explains how that data is collected and shown.