Claude Opus 4.5 vs Grok 3
Grok 3 leads in 3 of 8 categories
Arena ELO
Claude Opus 4.5
Cheaper
Grok 3
Faster
Grok 3
Detailed Comparison
| Category | Claude Opus 4.5 | Grok 3 |
|---|---|---|
| Provider | Anthropic | xAI |
| Context Window | 200K WIN | 131K |
| Input Price ($/1M) | $5 | $3 WIN |
| Output Price ($/1M) | $25 | $15 WIN |
| Arena ELO | 1380 WIN | 1325 |
| Coding | 80.9% SWE-bench | unknown |
| Reasoning | unknown | 93.3% AIME 2025 |
| Speed (tokens/sec) | ~35 t/s | ~55 t/s WIN |
| Open Source | No | No |
Frequently Asked Questions
Which is cheaper, Claude Opus 4.5 or Grok 3?
Grok 3 is approximately 40% cheaper than Claude Opus 4.5 per million tokens.
Which is better for coding, Claude Opus 4.5 or Grok 3?
Claude Opus 4.5 scores 80.9% SWE-bench on coding benchmarks, while Grok 3 scores unknown.
Which has a larger context window?
Claude Opus 4.5 supports 200K context, while Grok 3 supports 131K.
Is Claude Opus 4.5 or Grok 3 open source?
Claude Opus 4.5 is proprietary. Grok 3 is proprietary.
Which ranks higher on the Chatbot Arena leaderboard?
Claude Opus 4.5 ranks higher with ELO 1380 vs 1325.
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