Claude Fable 5.1 Xhigh vs Kimi K3.1 Pro: which is cheaper?

Claude Fable 5.1 Xhigh leads the intelligence index 50.0 to 46.5. Compare price, speed, latency and a clear verdict.

Metric	Claude Fable 5.1 (Xhigh, Default Fallback)	Kimi K3.1 Pro
Intelligence Index	50.0	46.5
Input price (per 1M tokens)	$10.00	$2.00
Output price (per 1M tokens)	$50.00	$10.00
Output speed (tokens/s)	61	27
Time to first token	98s	3.0s
Release date	2026-09-01	2026-10-23

Metric

Claude Fable 5.1 (Xhigh, Default Fallback)

Kimi K3.1 Pro

Intelligence Index

50.0

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

98s

3.0s

Release date

2026-09-01

2026-10-23

Claude Fable 5.1 (Xhigh, Default Fallback) (Anthropic) and Kimi K3.1 Pro (Kimi) meet here on their recorded benchmark, price and speed data. Price separates them more than anything else; on a blended basis Claude Fable 5.1 Xhigh costs 5 times as much as Kimi K3.1 Pro. What follows is built entirely from tracked data, so where the catalogue is silent, this page says so instead of guessing.

What they cost

The list prices are $10.00 in and $50.00 out for Claude Fable 5.1 Xhigh, and $2.00 in and $10.00 out for Kimi K3.1 Pro, per million tokens. For output tokens, Claude Fable 5.1 Xhigh is 5 times the price of Kimi K3.1 Pro.

For a sample workload of 1 million input tokens and 200,000 output tokens, Claude Fable 5.1 Xhigh would cost $20.00 and Kimi K3.1 Pro $4.00, a difference of $16.00. For classifying 100,000 short messages at 150 input tokens and 5 output tokens each, Kimi K3.1 Pro would come in 80% lower: $175 for Claude Fable 5.1 Xhigh against $35.00 for Kimi K3.1 Pro. Blended at three input tokens per output token, the effective rates are $20.00 for Claude Fable 5.1 Xhigh and $4.00 for Kimi K3.1 Pro.

Benchmark scores

Claude Fable 5.1 Xhigh comes out ahead on the intelligence index, 50.0 to 46.5. That is a clear margin for an index that averages many evaluations. Put another way, Kimi K3.1 Pro would need 8% more on this index to draw level.

For context, that places Claude Fable 5.1 Xhigh 18th and Kimi K3.1 Pro 23rd out of 109 scored models still on offer.

Specialist coding and math indexes are missing for both, so treat the overall score as the only capability signal here.

Is the price in proportion?

Dividing the blended price by the intelligence index gives a rough cost per point: $0.40 for Claude Fable 5.1 Xhigh and $0.086 for Kimi K3.1 Pro, per million tokens. So Claude Fable 5.1 Xhigh buys its higher score at a premium, while Kimi K3.1 Pro is the value pick, paying 78% less per point.

Which is newer

Claude Fable 5.1 Xhigh came first, on September 1, 2026; Kimi K3.1 Pro followed on October 23, 2026.

Claude Fable 5.1 Xhigh is the faster writer

Claude Fable 5.1 Xhigh generates about 61 tokens per second and Kimi K3.1 Pro about 27 tokens per second. Claude Fable 5.1 Xhigh is ahead by 127% on throughput. Time to first token is 98 seconds for Claude Fable 5.1 Xhigh and 3.0 seconds for Kimi K3.1 Pro. Short replies favour Kimi K3.1 Pro; beyond about 4,600 tokens, Claude Fable 5.1 Xhigh claws the time back. A first-token wait of that length suits background work better than live conversation.

Add the two numbers up for a 1,000-token reply and Kimi K3.1 Pro finishes first: 114 seconds for Claude Fable 5.1 Xhigh, 40 seconds for Kimi K3.1 Pro.

FAQ

Is Claude Fable 5.1 Xhigh better than Kimi K3.1 Pro?

Not across the board: Claude Fable 5.1 Xhigh scores higher on the intelligence index, 50.0 to 46.5; Kimi K3.1 Pro is 80% cheaper on blended price; Claude Fable 5.1 Xhigh streams output 2.3 times as fast; and Kimi K3.1 Pro reaches its first token sooner.

Does Claude Fable 5.1 Xhigh respond faster than Kimi K3.1 Pro?

Claude Fable 5.1 Xhigh generates output faster, at 61 tokens per second against 27 tokens per second. Kimi K3.1 Pro reaches its first token sooner (3.0 seconds against 98 seconds). Counting the first-token wait, Kimi K3.1 Pro finishes short replies first and Claude Fable 5.1 Xhigh pulls ahead beyond about 4,600 tokens.

Is Kimi K3.1 Pro cheaper than Claude Fable 5.1 Xhigh?

Kimi K3.1 Pro is cheaper on a blended basis. Claude Fable 5.1 Xhigh 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.

Where do these numbers come from?

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.

Are Claude Fable 5.1 Xhigh and Kimi K3.1 Pro from the same company?

Claude Fable 5.1 Xhigh is made by Anthropic and Kimi K3.1 Pro by Kimi. Claude Fable 5.1 Xhigh was released on September 1, 2026 and Kimi K3.1 Pro on October 23, 2026.

Final whistle

In one line: on balance the numbers favour Kimi K3.1 Pro, though Claude Fable 5.1 Xhigh keeps a case of its own. Pick Kimi K3.1 Pro if cost matters ($10.00 against $50.00 per million output tokens) and users are waiting on the first word. Pick Claude Fable 5.1 Xhigh if you need the higher overall score (50.0 against 46.5) and your outputs often run past about 4,600 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 Claude Fable 5.1 (Xhigh, Default Fallback) and Kimi K3.1 Pro pages. The AI Benchmark methodology explains how that data is collected and shown.