token.app › Compare › Claude Opus 4.5 vs Grok 4.5
Claude Opus 4.5 vs Grok 4.5
Grok 4.5 leads on 5 of 5 shared benchmarks. Grok 4.5 is 3.3× cheaper per token on a blended 3:1 basis. Grok 4.5 accepts the larger context window (500K).
Head to head
Blended price uses a 3:1 input:output mix
| Claude Opus 4.5 | Grok 4.5 | |
|---|---|---|
| Provider | Anthropic | xAI |
| Input $/1M | $5.00 | $2.00 |
| Output $/1M | $25.00 | $6.00 |
| Blended $/1M | $10.00 | $3.00 |
| Context window | 200K | 500K |
| Max output | 64K | — |
| Released | Nov 2025 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 86.0% | 93.4% |
| FrontierMath T1–3 | 34.4% | 57.2% |
| FrontierMath T4 | 4.9% | 24.4% |
| SimpleQA Verified | 41.8% | 53.5% |
| OTIS Mock AIME | 86.1% | 97.8% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose Claude Opus 4.5 if…
- No clear advantage on the data we hold.
Choose Grok 4.5 if…
- Costs less per token — $3.00 vs $10.00 blended
- Higher GPQA Diamond (93.4% vs 86.0%)
- Higher FrontierMath T1–3 (57.2% vs 34.4%)
- Higher FrontierMath T4 (24.4% vs 4.9%)
- Higher SimpleQA Verified (53.5% vs 41.8%)
- Larger context window (500K)
- Newer model (released Jul 2026)
FAQ
Which is better, Claude Opus 4.5 or Grok 4.5?
Across the 5 benchmarks both models have independently-run scores for, Claude Opus 4.5 leads on 0 and Grok 4.5 leads on 5. Benchmarks are one input — price and context window are on this page too.
Is Claude Opus 4.5 cheaper than Grok 4.5?
Grok 4.5 is cheaper: $3.00 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $5.00 vs $2.00. Output alone: $25.00 vs $6.00.
What context windows do Claude Opus 4.5 and Grok 4.5 have?
Claude Opus 4.5: 200,000 tokens. Grok 4.5: 500,000 tokens.
Who makes Claude Opus 4.5 and Grok 4.5?
Claude Opus 4.5 is made by Anthropic. Grok 4.5 is made by xAI.