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Anthropic Claude Sonnet 4.6 VS xAI Grok 4.5

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

📊Our Take

Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing Claude Sonnet 4.6 and Grok 4.5 directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Model Specs

Claude Sonnet 4.6

Benchmarks & Scores

Coding (swe-bench-pro)
N/A

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)
79.9%

graduate-level science QA

Cost & Performance

Cost (per 1M tokens)
$6.00Input: $3.00 | Output: $15.00
Context WindowLarger
1.05M tokens
Model Specs

Grok 4.5

Benchmarks & Scores

Coding (swe-bench-pro)
64.7%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)Winner (+13.1%)
93%

graduate-level science QA

Cost & Performance

Cost (per 1M tokens)2.0x cheaper
$3.00Input: $2.00 | Output: $6.00
Context Window
500k tokens

Frequently Asked Questions about Claude Sonnet 4.6 vs Grok 4.5 comparison

Grok 4.5 is cheaper than Claude Sonnet 4.6. Grok 4.5 has a blended cost of $3.00/1M tokens, which is about 2.0x cheaper than Claude Sonnet 4.6 at $6.00/1M tokens.