Compare GPT-6.1 Terra Pro from OpenAI and Grok 4.6 from SpaceXAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
GPT-6.1 Terra Pro and Grok 4.6 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-6.1 Terra Pro, from OpenAI, has a 1,050,000-token context window and is priced at $1/M tokens input, $5/M tokens output on OpenRouter.
Grok 4.6, from SpaceXAI, has a 500,000-token context window and is priced at $2/M tokens input, $6/M tokens output on OpenRouter.
| Attribute | GPT-6.1 Terra Pro | Grok 4.6 |
|---|---|---|
| Input price | $1/M tokens | $2/M tokens |
| Output price | $5/M tokens | $6/M tokens |
| Context window | 1,050,000 tokens | 500,000 tokens |
| Intelligence Index | Not available | Not available |
| Coding Index | Not available | 76.8 |
| Agentic Index | Not available | 53.0 |
| Latency (p50) | 3.26 s | 1.83 s |
| Throughput (p50) | 68.0 tok/s | 65.0 tok/s |
Benchmark data updated
GPT-6.1 Terra Pro has the longer context window at 1,050,000 tokens, compared with 500,000 tokens for Grok 4.6.
GPT-6.1 Terra Pro is faster on OpenRouter, generating a median 68.0 tokens per second compared with 65.0 tokens per second for Grok 4.6.