Kimi K3.1 Pro vs Sonar Reasoning Pro

Price, context window & benchmark comparison

Kimi K3.1 Pro

Moonshot AI

$2.00 / $10.00

Input / Output · per 1M tokens

Sonar Reasoning Pro

Perplexity

$2.00 / $8.00

Input / Output · per 1M tokens

Compare different models

Verdict: Sonar Reasoning Pro is 13% cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix. Kimi K3.1 Pro has the larger context window (1M vs 128K).

	Kimi K3.1 Pro	Sonar Reasoning Pro
Input price / 1M	$2.00	$2.00
Output price / 1M	$10.00	$8.00
Blended price (3:1)	$4.00	$3.50
Cached input / 1M	$0.20	—
Context window	1M	128K
Max output	944K	115K
Intelligence index	46.5	—
Coding index	—	—
Providers	23	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	No
Released	2026-10-23	2025-03-07
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Kimi K3.1 Pro or Sonar Reasoning Pro?

Sonar Reasoning Pro is 13% cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix.

Kimi K3.1 Pro vs Sonar Reasoning Pro: which has a bigger context window?

Kimi K3.1 Pro: 1,048,576 tokens. Sonar Reasoning Pro: 128,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Kimi K3.1 Pro ≈ $9,000, Sonar Reasoning Pro ≈ $8,000.

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