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  1. Home
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  3. Compare

GPT-6.1 Terra Pro vs Grok 4.6

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.

Favicon for openai
GPT-6.1 Terra Pro
Favicon for x-ai
Grok 4.6
Favicon for openai
GPT-6.1 Terra Pro
Favicon for x-ai
Grok 4.6

Overview

GPT-6.1 Terra Pro
Author
OpenAI
Grok 4.6
Author
SpaceXAI
GPT-6.1 Terra Pro
Context length
1.05Mtokens
Grok 4.6
Context length
500Ktokens
GPT-6.1 Terra Pro
Reasoning
Grok 4.6
Reasoning
GPT-6.1 Terra Pro
Input modalities
Grok 4.6
Input modalities
GPT-6.1 Terra Pro
Output modalities
Grok 4.6
Output modalities

GPT-6.1 Terra Pro vs Grok 4.6: side-by-side summary

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.

Context window
  • GPT-6.1 Terra Pro: 1,050,000 tokens
  • Grok 4.6: 500,000 tokens
Price
  • GPT-6.1 Terra Pro: $1/M tokens input, $5/M tokens output
  • Grok 4.6: $2/M tokens input, $6/M tokens output
Provided by
  • GPT-6.1 Terra Pro: OpenAI
  • Grok 4.6: SpaceXAI
  • GPT-6.1 Terra Pro model details, providers and pricing
  • Grok 4.6 model details, providers and pricing

GPT-6.1 Terra Pro vs Grok 4.6 at a glance

GPT-6.1 Terra Pro vs Grok 4.6 comparison
AttributeGPT-6.1 Terra ProGrok 4.6
Input price$1/M tokens$2/M tokens
Output price$5/M tokens$6/M tokens
Context window1,050,000 tokens500,000 tokens
Intelligence IndexNot availableNot available
Coding IndexNot available76.8
Agentic IndexNot available53.0
Latency (p50)3.26 s1.83 s
Throughput (p50)68.0 tok/s65.0 tok/s

Benchmark data updated Oct 28, 2026

Frequently asked questions

Which has the longer context window, GPT-6.1 Terra Pro or Grok 4.6?

GPT-6.1 Terra Pro has the longer context window at 1,050,000 tokens, compared with 500,000 tokens for Grok 4.6.

Which is faster, GPT-6.1 Terra Pro or 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.