Grok 4.3 vs Claude Sonnet 5
xAI's reasoning model built for agentic workflows and high-accuracy instruction-following.
Anthropic's fifth-generation Sonnet — near-Opus intelligence at Sonnet speed and price.
No captured outputs for these models yet.
Frequently Asked Questions: Grok 4.3 vs Claude Sonnet 5▼
Which is better, Grok 4.3 or Claude Sonnet 5?
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Based on the Capability Index, Grok 4.3 scores higher (80.8 vs 80.1). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
Which is cheaper, Grok 4.3 or Claude Sonnet 5?
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Grok 4.3 has a lower blended cost. Grok 4.3: $1.25 input / $2.50 output. Claude Sonnet 5: $3.00 input / $15.00 output.
Which has a larger context window, Grok 4.3 or Claude Sonnet 5?
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Grok 4.3 has a larger context window: Grok 4.3 supports 1M tokens vs Claude Sonnet 5 at 1M tokens.
Do both Grok 4.3 and Claude Sonnet 5 support vision?
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Yes, both Grok 4.3 and Claude Sonnet 5 support vision/image input.
What are the key differences between Grok 4.3 and Claude Sonnet 5?
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Key differences: Grok 4.3 is significantly cheaper. Compare full specs on this page.
Which model should I choose for my use case?
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If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Grok 4.3 and Claude Sonnet 5 for free on idapt.app to see which performs better for your specific needs.