xAI Grok
Grok 4.6
$3.00 / 1M tokens
cheapest at xAI · $2.00 in · $6.00 out
Wins 1 of 4
Head to head · prices updated Nov 1, 2026
Grok 4.6 vs GPT-6 Astra
GPT-6 Astra costs 6.7× as much as Grok 4.6 at their cheapest providers (blended 3 input : 1 output tokens).
OpenAI
GPT-6 Astra
$20.00 / 1M tokens
cheapest at OpenAI · $10.00 in · $50.00 out
Wins 2 of 4
- Lower priceGrok 4.6
- Higher accuracy (GPQA)GPT-6 Astra
- Longer contextGPT-6 Astra
- More providersTie
Verdict
Grok 4.6 is the better deal on price
GPT-6 Astra costs 6.7× as much as Grok 4.6 at their cheapest providers (blended 3 input : 1 output tokens).
GPT-6 Astra scores higher on GPQA Diamond: 95.8% (max reasoning) vs 94.0% (high reasoning).
So the choice is a trade-off: GPT-6 Astra for the hardest reasoning, Grok 4.6 when cost matters more than the last few points of accuracy.
GPT-6 Astra accepts longer prompts (922K vs 524K tokens).
Your monthly bill
What would each cost you?
Grok 4.6 saves you $168.00 a month ($2,016.00 a year) for this workload.
Side by side
| Grok 4.6 | GPT-6 Astra | |
|---|---|---|
| Cheapest blended price / 1M | $3.00 | $20.00 |
| Input / output per 1M | $2.00 / $6.00 | $10.00 / $50.00 |
| Accuracy (GPQA Diamond) | 94.0% (high reasoning) | 95.8% (max reasoning) |
| Max context | 524K | 922K |
| Providers we track | 3 | 3 |
Standard list prices at each model's cheapest provider we track; blended = 3 input : 1 output tokens. GPQA Diamond from Epoch AI (CC BY 4.0), best measured reasoning setting, named next to each score. Methodology.
Where to buy each one
Grok 4.6
- xAI$3.00
- Google Cloud Vertex AI$3.00
- Microsoft Azure AI Foundry$3.00
GPT-6 Astra
- OpenAI$20.00
- Amazon Bedrock$20.00
- Microsoft Azure AI Foundry$20.00
Questions people ask
Is Grok 4.6 cheaper than GPT-6 Astra?
GPT-6 Astra costs 6.7× as much as Grok 4.6 at their cheapest providers (blended 3 input : 1 output tokens).
Which is more accurate, Grok 4.6 or GPT-6 Astra?
On GPQA Diamond (graduate-level science questions, measured by Epoch AI) Grok 4.6 scores 94.0% (high reasoning) and GPT-6 Astra 95.8% (max reasoning). One benchmark is not the whole picture; test both on your own prompts.
How much does Grok 4.6 cost per 1M tokens?
From $2.00 input and $6.00 output per 1M tokens at xAI, the cheapest of 3 providers we track.
How much does GPT-6 Astra cost per 1M tokens?
From $10.00 input and $50.00 output per 1M tokens at OpenAI, the cheapest of 3 providers we track.
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