Model Comparison

Comprehensive side-by-side analysis of model capabilities and performance

Anthropic

Claude Sonnet 4.5

Anthropic

Claude Sonnet 4.5 is a multimodal language model developed by Anthropic. It achieves strong performance with an average score of 78.0% across 10 benchmarks. It excels particularly in Tau2 Telecom (98.0%), MMMLU (89.1%), AIME 2025 (87.0%). It supports a 264K token context window for handling large documents. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents Anthropic's latest advancement in AI technology.

xAI

Grok-4

xAI

Grok-4 is a multimodal language model developed by xAI. It achieves strong performance with an average score of 63.1% across 7 benchmarks. It excels particularly in AIME 2025 (91.7%), HMMT25 (90.0%), GPQA (87.5%). It supports a 264K token context window for handling large documents. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents xAI's latest advancement in AI technology.

xAI

Grok-4

xAI

2025-07-09

Anthropic

Claude Sonnet 4.5

Anthropic

2025-09-29

2 months newer

Pricing Comparison

Cost per million tokens (USD)

Anthropic

Claude Sonnet 4.5

Input:$3.00
Output:$15.00
xAI

Grok-4

Input:$3.00
Output:$15.00

Performance Metrics

Context window and performance specifications

Anthropic

Claude Sonnet 4.5

Max Context:264.0K
xAI

Grok-4

Max Context:264.0K

Average performance across 15 common benchmarks

Anthropic

Claude Sonnet 4.5

+22.6%
Average Score:52.0%
xAI

Grok-4

Average Score:29.4%

Performance comparison across key benchmark categories

Anthropic

Claude Sonnet 4.5

math
87.0%
code
50.0%
general
+14.2%
78.0%
xAI

Grok-4

math
+4.7%
91.7%
code
+29.0%
79.0%
general
63.7%
Knowledge Cutoff
Training data recency comparison

Grok-4

2024-12-31

Claude Sonnet 4.5

2025-01-31

More recent knowledge cutoff means awareness of newer technologies and frameworks

Provider Availability & Performance

Available providers and their performance metrics

Anthropic

Claude Sonnet 4.5

2 providers

Anthropic

Throughput: 42 tok/s
Latency: 0.4ms

ZeroEval

Throughput: 42 tok/s
Latency: 0.4ms
xAI

Grok-4

2 providers

xAI

Throughput: 100 tok/s
Latency: 0.7ms

ZeroEval

Throughput: 100 tok/s
Latency: 0.7ms
Anthropic

Claude Sonnet 4.5

+22.6%
Avg Score:52.0%
Providers:2
xAI

Grok-4

Avg Score:29.4%
Providers:2