Grok-1.5 vs o1-mini

Comparing Grok-1.5 by xAI and o1-mini by OpenAI across benchmarks, pricing, and capabilities.

o1-mini significantly outperforms across most benchmarks.

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Grok-1.5 outperforms in 0 benchmarks, while o1-mini is better at 3 benchmarks (GPQA, HumanEval, MMLU).

o1-mini significantly outperforms across most benchmarks.

Tue Mar 24 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Cost data unavailable.

Lowest available price from all providers
Tue Mar 24 2026 • llm-stats.com
xAI
Grok-1.5
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
OpenAI
o1-mini
Input tokens$3.00
Output tokens$12.00
Best providerOpenAI
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Context Window

Maximum input and output token capacity

Only o1-mini specifies input context (128,000 tokens). Only o1-mini specifies output context (65,536 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
OpenAI
o1-mini
Input128,000 tokens
Output65,536 tokens
Tue Mar 24 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Grok-1.5

Proprietary

Closed source

o1-mini

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while o1-mini was released on 2024-09-12.

o1-mini is 6 months newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.0 years ago

o1-mini

Sep 12, 2024

1.5 years ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

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Key Takeaways

Larger context window (128,000 tokens)
Higher GPQA score (60.0% vs 35.9%)
Higher HumanEval score (92.4% vs 74.1%)
Higher MMLU score (85.2% vs 81.3%)

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-1.5
OpenAI
o1-mini