Compare Grok 4.5 from SpaceXAI and Kimi K3 from moonshotai on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
| Attribute | Grok 4.5 | Kimi K3 |
|---|---|---|
| Input price | $2/M tokens | $0.1824/M tokens |
| Output price | $6/M tokens | $10.56/M tokens |
| Context window | 500,000 tokens | 1,048,576 tokens |
| Intelligence Index | Not available | Not available |
| Coding Index | 72.4 | 76.2 |
| Agentic Index | 41.2 | 50.0 |
| Latency (p50) | 1.24 s | 1.34 s |
| Throughput (p50) | 63.0 tok/s | 61.0 tok/s |
| Provided by | SpaceXAI | moonshotai |
| Model page | Grok 4.5 model details, providers and pricing | Kimi K3 model details, providers and pricing |
Benchmark data updated
Kimi K3 has the longer context window at 1,048,576 tokens, compared with 500,000 tokens for Grok 4.5.
Grok 4.5 is faster on OpenRouter, generating a median 63.0 tokens per second compared with 61.0 tokens per second for Kimi K3.
Kimi K3 scores higher on coding, with an Artificial Analysis Coding Index of 76.2 compared with 72.4 for Grok 4.5.