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Claude Opus 4.8 vs Grok 3

Grok 3 leads in 4 of 8 categories

Arena ELO

Grok 3

Cheaper

Grok 3

Faster

Grok 3

Detailed Comparison

CategoryClaude Opus 4.8Grok 3
ProviderAnthropic xAI
Context Window200K WIN131K
Input Price ($/1M)$5 $3 WIN
Output Price ($/1M)$25 $15 WIN
Arena ELON/A 1325 WIN
CodingN/A unknown
ReasoningN/A 93.3% AIME 2025
Speed (tokens/sec)N/A ~55 t/s WIN
Open SourceNo No

Frequently Asked Questions

Which is cheaper, Claude Opus 4.8 or Grok 3?

Grok 3 is approximately 40% cheaper than Claude Opus 4.8 per million tokens.

Which is better for coding, Claude Opus 4.8 or Grok 3?

Claude Opus 4.8 scores N/A on coding benchmarks, while Grok 3 scores unknown.

Which has a larger context window?

Claude Opus 4.8 supports 200K context, while Grok 3 supports 131K.

Is Claude Opus 4.8 or Grok 3 open source?

Claude Opus 4.8 is proprietary. Grok 3 is proprietary.

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