Head to head
SpaceXAI: Grok 4.6 vs OpenAI: GPT-6 Astra
Live prices, context windows, capabilities, and measured quality — updated continuously.
Side by side
| Metric | SpaceXAI: Grok 4.6 Xai | OpenAI: GPT-6 Astra Openai |
|---|---|---|
| Input $/M tokens | $2.00 | $5.00 |
| Output $/M tokens | $6.00 | $25.00 |
| Context window | 500K | 1.1M |
| Max output | 450K | 128K |
| WM Score | 89 | 86 |
| Benchmark quality | 91.4 | 90.3 |
| Hosts serving it | 2 | 2 |
| Throughput (tok/s) | 63 | 53 |
| Latency (ms) | 757 | 2338 |
| Vision | ||
| Tools | ||
| Reasoning | ||
| JSON mode |
Which should you pick?
SpaceXAI: Grok 4.6 costs less per million input tokens — about 2.5× cheaper than OpenAI: GPT-6 Astra. SpaceXAI: Grok 4.6 scores higher on measured quality. OpenAI: GPT-6 Astra takes a larger context window, which matters for long documents or big codebases. Prices here are live list prices; the same model can cost less on a different host, so check the model page for the cheapest offering.