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Side-by-side comparison of API pricing, context window, latency, and benchmark performance. Data refreshed daily from provider APIs and ModelStop's own latency probes.
💰xAI: Grok 4.20 is 100% cheaper than xAI: Grok 4
⚡xAI: Grok 4 is 16ms faster than xAI: Grok 4.20
Price (lower is better), Speed/Latency (lower is better), Performance (higher is better)
| Spec | xAI: Grok 4 | xAI: Grok 4.20 |
|---|---|---|
| Provider | x-ai | x-ai |
| Input price / 1M tokens | $3.00 | Free |
| Output price / 1M tokens | $15.00 | — |
| Context window | 256k tokens | 2000k tokens |
| Latency (p50) | — | 16ms |
| Best benchmark score | — | — |
| Open source | No | No |
Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not...
Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
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