Grok-1.5 vs Claude 3 Opus

Comparing Grok-1.5 by xAI and Claude 3 Opus by Anthropic across benchmarks, pricing, and capabilities.

Claude 3 Opus significantly outperforms across most benchmarks.

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Grok-1.5 outperforms in 0 benchmarks, while Claude 3 Opus is better at 6 benchmarks (GPQA, GSM8k, HumanEval, MATH, MMLU, MMLU-Pro).

Claude 3 Opus significantly outperforms across most benchmarks.

Wed Mar 25 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
Wed Mar 25 2026 • llm-stats.com
xAI
Grok-1.5
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
Anthropic
Claude 3 Opus
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
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Context Window

Maximum input and output token capacity

Only Claude 3 Opus specifies input context (200,000 tokens). Only Claude 3 Opus specifies output context (200,000 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
Anthropic
Claude 3 Opus
Input200,000 tokens
Output200,000 tokens
Wed Mar 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3 Opus supports multimodal inputs, whereas Grok-1.5 does not.

Claude 3 Opus can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok-1.5

Text
Images
Audio
Video

Claude 3 Opus

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.

Grok-1.5

Proprietary

Closed source

Claude 3 Opus

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while Claude 3 Opus was released on 2024-02-29.

Grok-1.5 is 1 month newer than Claude 3 Opus.

Grok-1.5

Mar 28, 2024

2.0 years ago

4w newer
Claude 3 Opus

Feb 29, 2024

2.1 years ago

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 (200,000 tokens)
Supports multimodal inputs
Higher GPQA score (50.4% vs 35.9%)
Higher GSM8k score (95.0% vs 90.0%)
Higher HumanEval score (84.9% vs 74.1%)
Higher MATH score (60.1% vs 50.6%)
Higher MMLU score (86.8% vs 81.3%)
Higher MMLU-Pro score (68.5% vs 51.0%)

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-1.5
Anthropic
Claude 3 Opus