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Claude Sonnet 4 vs Grok 3: Pricing, Benchmarks & Verdict (2026)

Verdict

Grok 3 ranks higher overall with an Arena ELO of 1300 vs 1280. Claude Sonnet 4 offers a larger 200K context window vs 128K.

Side-by-Side Comparison

FeatureClaude Sonnet 4Grok 3
ProviderAnthropicxAI
Input Price / 1M tokens$3.00$3.00
Output Price / 1M tokens$15.00$15.00
Context Window200K128K
Max Output Tokens64,00016,384
Arena ELO1,2801,300
Coding ELO1,3051,290
TTFT (ms)320300
Tokens/sec7880
MultimodalYesYes
JSON ModeYesYes
Function CallingYesYes
VisionYesYes
When to Use Claude Sonnet 4

Choose Claude Sonnet 4 when you need: best-in-class coding performance, 200k context window, excellent instruction following. It excels at coding, analysis, long-context, agents tasks. Its 200K context window is larger, making it better for long-document processing.

Strengths:

  • Best-in-class coding performance
  • 200K context window
  • Excellent instruction following

Best for:

codinganalysislong-contextagents
When to Use Grok 3

Choose Grok 3 when you need: strong benchmark performance, good reasoning capabilities, vision and multimodal support, fast for its capability tier. It excels at general-purpose, reasoning, coding tasks.

Strengths:

  • Strong benchmark performance
  • Good reasoning capabilities
  • Vision and multimodal support
  • Fast for its capability tier

Best for:

general-purposereasoningcoding

Frequently Asked Questions

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