grok-4.1 vs GPT-5.1-Instant
GPT-5.1-Instant is cheaper on output tokens, while grok-4.1 offers a larger context window. Choose grok-4.1 or GPT-5.1-Instant based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | grok-4.1 | GPT-5.1-Instant |
|---|---|---|
| Provider | 302.AI | Poe |
| Input / 1M tokens | $2.00 | $1.10 |
| Output / 1M tokens | $10.00 | $9.00 |
| Context window | 200K | 128K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Nov 2025 | Nov 2025 |
| LMArena (Chatbot Arena) Elo score | 1436 | — |
| LMArena WebDev Elo score | 1215 | — |
FAQ
Is grok-4.1 or GPT-5.1-Instant cheaper?
GPT-5.1-Instant is cheaper on output tokens ($9.00 vs $10.00 per 1M).
Which has the larger context window, grok-4.1 or GPT-5.1-Instant?
grok-4.1 has the larger context window (200K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.