Model Comparison

Grok-1.5 vs o3-mini

o3-mini significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Grok-1.5 outperforms in 0 benchmarks, while o3-mini is better at 3 benchmarks (GPQA, MATH, MMLU).

o3-mini significantly outperforms across most benchmarks.

Sat Apr 18 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
Sat Apr 18 2026 • llm-stats.com
xAI
Grok-1.5
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
OpenAI
o3-mini
Input tokens$1.10
Output tokens$4.40
Best providerAzure
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only o3-mini specifies input context (200,000 tokens). Only o3-mini specifies output context (100,000 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
OpenAI
o3-mini
Input200,000 tokens
Output100,000 tokens
Sat Apr 18 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

o3-mini

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while o3-mini was released on 2025-01-30.

o3-mini is 10 months newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.1 years ago

o3-mini

Jan 30, 2025

1.2 years ago

10mo newer

Knowledge Cutoff

When training data ends

o3-mini has a documented knowledge cutoff of 2023-09-30, while Grok-1.5's cutoff date is not specified.

We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without Grok-1.5's cutoff date.

Grok-1.5

—

o3-mini

Sep 2023

Outputs Comparison

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Key Takeaways

xAI
OpenAI
Larger context window (200,000 tokens)
Higher GPQA score (77.2% vs 35.9%)
Higher MATH score (97.9% vs 50.6%)
Higher MMLU score (86.9% vs 81.3%)

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-1.5
OpenAI
o3-mini

FAQ

Common questions about Grok-1.5 vs o3-mini

o3-mini significantly outperforms across most benchmarks. Grok-1.5 is made by xAI and o3-mini is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%. o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%.
Grok-1.5 supports an unknown number of tokens and o3-mini supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Grok-1.5 is developed by xAI and o3-mini is developed by OpenAI.