GPT-6.1 Terra (US) vs Grok 4.5
GPT-6.1 Terra (US) is cheaper on output tokens, while GPT-6.1 Terra (US) offers a larger context window. Choose GPT-6.1 Terra (US) or Grok 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-6.1 Terra (US) | Grok 4.5 |
|---|---|---|
| Provider | Amazon Bedrock | SpaceXAI |
| Input / 1M tokens | $1.10 | $2.00 |
| Output / 1M tokens | $5.50 | $6.00 |
| Context window | 1.1M | 500K |
| Parameters | — | — |
| Open weights | No | — |
| Released | Oct 2026 | — |
| LMArena (Chatbot Arena) Elo score | — | 1448 |
| Epoch Capabilities Index score | — | 154 |
| GPQA Diamond score | — | 93.4 |
| LMArena WebDev Elo score | — | 1553 |
| LMArena Vision Elo score | — | 1287 |
FAQ
Is GPT-6.1 Terra (US) or Grok 4.5 cheaper?
GPT-6.1 Terra (US) is cheaper on output tokens ($5.50 vs $6.00 per 1M).
Which has the larger context window, GPT-6.1 Terra (US) or Grok 4.5?
GPT-6.1 Terra (US) has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.