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xAI: Grok 3 vs Anthropic: Claude Opus 4.1

Head-to-head API cost, context, and performance comparison. Synced at 12:39:51 PM.

Executive Summary

When evaluating xAI: Grok 3 against Anthropic: Claude Opus 4.1, the pricing structure is a key differentiator. xAI: Grok 3 is approximately 80% more cost-effective per 1 million tokens overall.

However, when looking at raw reasoning capabilities, Anthropic: Claude Opus 4.1 leads with a statistical ELO score of 1320. For tasks involving complex logic, coding, or instruction-following, developers might prefer Anthropic: Claude Opus 4.1, provided their budget allows for the API burn rate.

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Raw Technical comparison

Metric
xAI: Grok 3
Anthropic: Claude Opus 4.1
Performance (ELO)
1320
1320
Input Cost / 1M
$3.00
$15.00
Output Cost / 1M
$15.00
$75.00
Context Window
131,072 tokens
200,000 tokens

Verdict

If you are looking for pure performance and capability, Tie is statistically superior. However, if API burn rate is the primary concern, xAI: Grok 3 wins out aggressively in pricing.

People Also Ask

Is xAI: Grok 3 cheaper than Anthropic: Claude Opus 4.1?

Yes. xAI: Grok 3 is cheaper for both input and output generation compared to Anthropic: Claude Opus 4.1. Exploring alternatives often yields cost reductions.

Which model has the larger context window?

The Anthropic: Claude Opus 4.1 model has the advantage in memory, offering a massive 200,000 token limit for document ingestion.

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