Index · comparison
Grok 4.6 (xAI) vs GPT-6 Astra (OpenAI)
Grok 4.6 (xAI) is 87% cheaper than GPT-6 Astra (OpenAI) ($8.00 vs $60.00 blended per 1M tokens).
Grok 4.6 (xAI) on xAI vs GPT-6 Astra (OpenAI) on OpenAI — frontier flagships. Every figure below is the value shown on each model's own endpoint page, with its source and verification date.
| Metric | Grok 4.6 (xAI) | GPT-6 Astra (OpenAI) |
|---|---|---|
| Input $/1M | $2 | $10 |
| Output $/1M | $6 | $50 |
| Blended $/1M | $8 | $60 |
| Context window | 256K | 1M |
| Max output | 32K | 128K |
Highlighted cell = better on that row (lower price/latency, higher context/intelligence/throughput). "—" = not measured for that model.
Which to pick
On blended token price, Grok 4.6 (xAI) is the cheaper of the two ($8 vs $60 per 1M). Price alone rarely settles it: check the intelligence index and latency rows above against your workload, and open each endpoint page for the full price history and provider terms.
Sources: Grok 4.6 (xAI) endpoint · GPT-6 Astra (OpenAI) endpoint · Grok 4.6 (xAI) price verified 2026-09-03 · GPT-6 Astra (OpenAI) price verified 2026-09-04