Model Comparison

Claude Sonnet 4 vs Grok-1.5V

Claude Sonnet 4 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Sonnet 4 outperforms in 1 benchmarks (MMMU), while Grok-1.5V is better at 0 benchmarks.

Claude Sonnet 4 significantly outperforms across most benchmarks.

Sun Apr 19 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 19 2026 • llm-stats.com
Anthropic
Claude Sonnet 4
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
xAI
Grok-1.5V
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
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Context Window

Maximum input and output token capacity

Only Claude Sonnet 4 specifies input context (200,000 tokens). Only Claude Sonnet 4 specifies output context (64,000 tokens).

Anthropic
Claude Sonnet 4
Input200,000 tokens
Output64,000 tokens
xAI
Grok-1.5V
Input- tokens
Output- tokens
Sun Apr 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4 and Grok-1.5V support multimodal inputs.

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

Claude Sonnet 4

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.

Claude Sonnet 4

Proprietary

Closed source

Grok-1.5V

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4 was released on 2025-05-22, while Grok-1.5V was released on 2024-04-12.

Claude Sonnet 4 is 14 months newer than Grok-1.5V.

Claude Sonnet 4

May 22, 2025

11 months ago

1.1yr newer
Grok-1.5V

Apr 12, 2024

2.0 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

Anthropic
Larger context window (200,000 tokens)
Higher MMMU score (74.4% vs 53.6%)
xAI
AnthropicClaude Sonnet 4
xAIGrok-1.5V
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4
xAI
Grok-1.5V

FAQ

Common questions about Claude Sonnet 4 vs Grok-1.5V

Claude Sonnet 4 significantly outperforms across most benchmarks. Claude Sonnet 4 is made by Anthropic and Grok-1.5V is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude Sonnet 4 scores MMMLU: 86.5%, TAU-bench Retail: 80.5%, GPQA: 75.4%, MMMU: 74.4%, SWE-Bench Verified: 72.7%. Grok-1.5V scores AI2D: 88.3%, DocVQA: 85.6%, TextVQA: 78.1%, ChartQA: 76.1%, RealWorldQA: 68.7%.
Claude Sonnet 4 supports 200K 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.
Claude Sonnet 4 is developed by Anthropic and Grok-1.5V is developed by xAI.