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Data verified: Oct 27, 2026, 9:28 AM UTC · Prices sourced from official provider pages. Verify current rates before production use.
Data verified: Oct 27, 2026, 9:28 AM UTC · Prices sourced from official provider pages. Verify current rates before production use.
Price, context and performance head to head. Data synced from the provider catalog.
Cheaper
Grok 4.20
Larger context
Grok 4.20
Faster
Grok 4.20
Higher quality
GPT-6.1 Sol Pro
| Feature | GPT-6.1 Sol Pro | Grok 4.20 |
|---|---|---|
| Provider | OpenAI | xAI |
| Tier | Flagship | Mid-tier |
| Input per 1M tokens | $2 | $1.25 |
| Output per 1M tokens | $10 | $2.5 |
| Cached input per 1M | $0.1 | $0.2 |
| Context window | 1.1M | 2M |
| Intelligence index | — | 26/100 |
| Coding index | — | — |
| Agentic index | — | — |
| GPQA Diamond | — | — |
| Tau-bench (airline) | — | — |
| Speed | Slow | Standard |
| Vision (image input) | Yes | Yes |
| Function calling | Yes | Yes |
| Batch API | No | No |
Enter how many requests per day you send with an average prompt (1K input + 1K output) and compare the monthly cost of both models.
Grok 4.20 saves $24.8/mo vs GPT-6.1 Sol Pro
Want us to build it for you?
We integrate GPT-6.1 Sol Pro or Grok 4.20 into your product with caching, observability and continuous evaluation — typically 40-80% cheaper than the obvious first pick.
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