Model Comparison

Grok-1.5 vs Claude 3.5 Sonnet

Claude 3.5 Sonnet significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

9 benchmarks

Grok-1.5 outperforms in 0 benchmarks, while Claude 3.5 Sonnet is better at 9 benchmarks (DocVQA, GPQA, GSM8k, HumanEval, MATH, MathVista, MMLU, MMLU-Pro, MMMU).

Claude 3.5 Sonnet significantly outperforms across most benchmarks.

Sun Apr 12 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
Sun Apr 12 2026 • llm-stats.com
xAI
Grok-1.5
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
Anthropic
Claude 3.5 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only Claude 3.5 Sonnet specifies input context (200,000 tokens). Only Claude 3.5 Sonnet specifies output context (200,000 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
Anthropic
Claude 3.5 Sonnet
Input200,000 tokens
Output200,000 tokens
Sun Apr 12 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.5 Sonnet supports multimodal inputs, whereas Grok-1.5 does not.

Claude 3.5 Sonnet 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 3.5 Sonnet

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 3.5 Sonnet

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while Claude 3.5 Sonnet was released on 2024-10-22.

Claude 3.5 Sonnet is 7 months newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.0 years ago

Claude 3.5 Sonnet

Oct 22, 2024

1.5 years ago

6mo 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

xAI
Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Higher DocVQA score (95.2% vs 85.6%)
Higher GPQA score (67.2% vs 35.9%)
Higher GSM8k score (96.4% vs 90.0%)
Higher HumanEval score (93.7% vs 74.1%)
Higher MATH score (78.3% vs 50.6%)
Higher MathVista score (67.7% vs 52.8%)
Higher MMLU score (90.4% vs 81.3%)
Higher MMLU-Pro score (77.6% vs 51.0%)
Higher MMMU score (68.3% vs 53.6%)

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-1.5
Anthropic
Claude 3.5 Sonnet

FAQ

Common questions about Grok-1.5 vs Claude 3.5 Sonnet

Claude 3.5 Sonnet significantly outperforms across most benchmarks. Grok-1.5 is made by xAI and Claude 3.5 Sonnet is made by Anthropic. 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%. Claude 3.5 Sonnet scores GSM8k: 96.4%, DocVQA: 95.2%, AI2D: 94.7%, HumanEval: 93.7%, BIG-Bench Hard: 93.1%.
Grok-1.5 supports an unknown number of tokens and Claude 3.5 Sonnet supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.
Grok-1.5 is developed by xAI and Claude 3.5 Sonnet is developed by Anthropic.