Claude Opus 5 vs Kimi K3

Price, context window & benchmark comparison

A

Claude Opus 5

Anthropic
$5.00 / $25.00
Input / Output · per 1M tokens
VS
M

Kimi K3

Moonshot AI
$3.00 / $15.00
Input / Output · per 1M tokens
Compare different models
A
M
Verdict: Kimi K3 is 40% cheaper than Claude Opus 5 on a typical 3:1 input/output mix. Claude Opus 5 scores higher on the Artificial Analysis Intelligence Index (50.8 vs 43.6). Kimi K3 has the larger context window (1M vs 1M).
Claude Opus 5Kimi K3
Input price / 1M$5.00$3.00
Output price / 1M$25.00$15.00
Blended price (3:1)$10.00$6.00
Cached input / 1M$0.50$0.30
Context window1M1M
Max output128K944K
Intelligence index50.843.6
Coding index7876.2
Providers1120
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-07-242026-07-16
Retirement

Cost calculator

FAQ

Which is cheaper, Claude Opus 5 or Kimi K3?

Kimi K3 is 40% cheaper than Claude Opus 5 on a typical 3:1 input/output mix.

Claude Opus 5 vs Kimi K3: which has a bigger context window?

Claude Opus 5: 1,000,000 tokens. Kimi K3: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Opus 5 ≈ $22,500, Kimi K3 ≈ $13,500.

More comparisons