Grok 4.5 vs Kimi K3
Price, context window & benchmark comparison
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Verdict: Grok 4.5 is 2.0× cheaper than Kimi K3 on a typical 3:1 input/output mix. Kimi K3 scores higher on the Artificial Analysis Intelligence Index (43.6 vs 38.8). Kimi K3 has the larger context window (1M vs 500K).
| Grok 4.5 | Kimi K3 | |
|---|---|---|
| Input price / 1M | $2.00 | $3.00 |
| Output price / 1M | $6.00 | $15.00 |
| Blended price (3:1) | $3.00 | $6.00 |
| Cached input / 1M | $0.30 | $0.30 |
| Context window | 500K | 1M |
| Max output | 450K | 944K |
| Intelligence index | 38.8 | 43.6 |
| Coding index | 72.4 | 76.2 |
| Providers | 4 | 20 |
| Best provider uptime (30m) | 100.0% | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-07-08 | 2026-07-16 |
| Retirement | — | — |
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FAQ
Which is cheaper, Grok 4.5 or Kimi K3?
Grok 4.5 is 2.0× cheaper than Kimi K3 on a typical 3:1 input/output mix.
Grok 4.5 vs Kimi K3: which has a bigger context window?
Grok 4.5: 500,000 tokens. Kimi K3: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Grok 4.5 ≈ $7,000, Kimi K3 ≈ $13,500.
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