Claude Opus 4.8 vs Kimi K3

Price, context window & benchmark comparison

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Claude Opus 4.8

Anthropic
$5.00 / $25.00
Input / Output · per 1M tokens
VS
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Kimi K3

Moonshot AI
$3.00 / $15.00
Input / Output · per 1M tokens
Compare different models
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Verdict: Kimi K3 is 40% cheaper than Claude Opus 4.8 on a typical 3:1 input/output mix. Kimi K3 scores higher on the Artificial Analysis Intelligence Index (43.6 vs 41.8). Kimi K3 has the larger context window (1M vs 1M).
Claude Opus 4.8Kimi 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 index41.843.6
Coding index74.376.2
Providers1120
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-05-272026-07-16
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FAQ

Which is cheaper, Claude Opus 4.8 or Kimi K3?

Kimi K3 is 40% cheaper than Claude Opus 4.8 on a typical 3:1 input/output mix.

Claude Opus 4.8 vs Kimi K3: which has a bigger context window?

Claude Opus 4.8: 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 4.8 ≈ $22,500, Kimi K3 ≈ $13,500.

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