Claude Fable 5.1 vs Kimi K3.1 Pro

Price, context window & benchmark comparison

Claude Fable 5.1

Anthropic

$10.00 / $50.00

Input / Output · per 1M tokens

Kimi K3.1 Pro

Moonshot AI

$2.00 / $10.00

Input / Output · per 1M tokens

Compare different models

Verdict: Kimi K3.1 Pro is 5.0× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix. Claude Fable 5.1 scores higher on the Artificial Analysis Intelligence Index (49.7 vs 46). Kimi K3.1 Pro has the larger context window (1M vs 1M).

	Claude Fable 5.1	Kimi K3.1 Pro
Input price / 1M	$10.00	$2.00
Output price / 1M	$50.00	$10.00
Blended price (3:1)	$20.00	$4.00
Cached input / 1M	$0.25	$0.20
Context window	1M	1M
Max output	128K	944K
Intelligence index	49.7	46
Coding index	80.7	—
Providers	4	2
Best provider uptime (30m)	100.0%	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-01	2026-10-23
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Claude Fable 5.1 or Kimi K3.1 Pro?

Kimi K3.1 Pro is 5.0× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix.

Claude Fable 5.1 vs Kimi K3.1 Pro: which has a bigger context window?

Claude Fable 5.1: 1,000,000 tokens. Kimi K3.1 Pro: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Fable 5.1 ≈ $45,000, Kimi K3.1 Pro ≈ $9,000.

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