Claude Opus 4.8 vs Grok 4.20
Anthropic's most capable Opus yet, built for long-horizon autonomous agents and frontier coding.
xAI's newest flagship model with industry-leading speed and agentic tool calling.
No captured outputs for these models yet.
Frequently Asked Questions: Claude Opus 4.8 vs Grok 4.20▼
Which is better, Claude Opus 4.8 or Grok 4.20?
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Based on the Capability Index, Claude Opus 4.8 scores higher (89.2 vs 85.7). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
Which is cheaper, Claude Opus 4.8 or Grok 4.20?
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Grok 4.20 has a lower blended cost. Claude Opus 4.8: $5.00 input / $25.00 output. Grok 4.20: $1.25 input / $2.50 output.
Which has a larger context window, Claude Opus 4.8 or Grok 4.20?
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Grok 4.20 has a larger context window: Claude Opus 4.8 supports 1M tokens vs Grok 4.20 at 2M tokens.
Do both Claude Opus 4.8 and Grok 4.20 support vision?
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Yes, both Claude Opus 4.8 and Grok 4.20 support vision/image input.
What are the key differences between Claude Opus 4.8 and Grok 4.20?
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Key differences: Grok 4.20 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 Claude Opus 4.8 and Grok 4.20 for free on idapt.app to see which performs better for your specific needs.