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GPT-6.1 Terra vs Grok-1.5V

GPT-6.1 Terra leads the LLM Stats Score 47.5 to -1.3.

OpenAI · xAI · Updated for 2026

Which is better?

GPT-6.1 Terra leads the overall LLM Stats Score 47.5 to -1.3, ranking #36 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose GPT-6.1 Terra

  • overall performance matters — it scores 47.5 and ranks #36 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Oct 2026

Choose Grok-1.5V

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

GPT-6.1 Terra
OpenAI
Grok-1.5V
xAI
Core performance indexes
LLM Stats Score
47.5
#36
-1.3
#369
Reasoning
49.0
#19
-0.5
#356
Cost, coverage & limits
Benchmark wins
—
—
Input price
$1.00 / M
— / M
Output price
$5.00 / M
— / M
Context window
1,050,000
—

Individual benchmarks

8 reported for GPT-6.1 Terra · 7 for Grok-1.5V

No common benchmarks found

GPT-6.1 Terra and Grok-1.5Vdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only GPT-6.1 Terra specifies input context (1,050,000 tokens). Only GPT-6.1 Terra specifies output context (128,000 tokens).

OpenAI
GPT-6.1 Terra
Input1,050,000 tokens
Output128,000 tokens
xAI
Grok-1.5V
Input- tokens
Output- tokens
Fri Oct 30 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-6.1 Terra and Grok-1.5V support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-6.1 Terra

Text
Images
Audio
Video

Grok-1.5V

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-6.1 Terra

Proprietary

Closed source

Grok-1.5V

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-6.1 Terra was released on 2026-10-26, while Grok-1.5V was released on 2024-04-12.

GPT-6.1 Terra is 31 months newer than Grok-1.5V.

GPT-6.1 Terra

Oct 26, 2026

-1 days ago

2.5yr newer
Grok-1.5V

Apr 12, 2024

2.5 years ago

Knowledge Cutoff

When training data ends

GPT-6.1 Terra has a documented knowledge cutoff of 2026-06-01, while Grok-1.5V's cutoff date is not specified.

We can confirm GPT-6.1 Terra's training data extends to 2026-06-01, but cannot make a direct comparison without Grok-1.5V's cutoff date.

GPT-6.1 Terra

Jun 2026

Grok-1.5V

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against GPT-6.1 Terra and Grok-1.5V side-by-side, then vote on the output you prefer.

GPT-6.1 Terra
✓ Preferred
Grok-1.5V
Open in Playground

FAQ

Common questions about GPT-6.1 Terra vs Grok-1.5V.

Which is better, GPT-6.1 Terra or Grok-1.5V?

GPT-6.1 Terra leads the LLM Stats Score 47.5 to -1.3. GPT-6.1 Terra is made by OpenAI and Grok-1.5V is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does GPT-6.1 Terra compare to Grok-1.5V in benchmarks?

GPT-6.1 Terra scores HealthBench Consensus: 95.1%, HealthBench Professional: 62.7%, Agents' Last Exam: 60.0%, Terminal-Bench-Science 0.1: 58.3%, MentalHealthBench: 55.5%. Grok-1.5V scores AI2D: 88.3%, DocVQA: 85.6%, TextVQA: 78.1%, ChartQA: 76.1%, RealWorldQA: 68.7%.

What are the context window sizes for GPT-6.1 Terra and Grok-1.5V?

GPT-6.1 Terra supports 1.1M tokens and Grok-1.5V supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-6.1 Terra and Grok-1.5V?

Key differences include LLM Stats Score (47.5 vs -1.3). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-6.1 Terra and Grok-1.5V?

GPT-6.1 Terra is developed by OpenAI and Grok-1.5V is developed by xAI.

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