token.app › Compare › Claude Sonnet 4 vs Grok 4.5
Claude Sonnet 4 vs Grok 4.5
Grok 4.5 leads on 2 of 2 shared benchmarks. Grok 4.5 is 2.0× cheaper per token on a blended 3:1 basis. Claude Sonnet 4 accepts the larger context window (1M).
Head to head
Blended price uses a 3:1 input:output mix
| Claude Sonnet 4 | Grok 4.5 | |
|---|---|---|
| Provider | Anthropic | xAI |
| Input $/1M | $3.00 | $2.00 |
| Output $/1M | $15.00 | $6.00 |
| Blended $/1M | $6.00 | $3.00 |
| Context window | 1M | 500K |
| Max output | 64K | — |
| Released | May 2025 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 79.2% | 93.4% |
| OTIS Mock AIME | 71.1% | 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 Sonnet 4 if…
- Larger context window (1M)
Choose Grok 4.5 if…
- Costs less per token — $3.00 vs $6.00 blended
- Higher GPQA Diamond (93.4% vs 79.2%)
- Higher OTIS Mock AIME (97.8% vs 71.1%)
- Newer model (released Jul 2026)
FAQ
Which is better, Claude Sonnet 4 or Grok 4.5?
Across the 2 benchmarks both models have independently-run scores for, Claude Sonnet 4 leads on 0 and Grok 4.5 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is Claude Sonnet 4 cheaper than Grok 4.5?
Grok 4.5 is cheaper: $3.00 versus $6.00 per million tokens blended at 3:1 input:output. Input alone: $3.00 vs $2.00. Output alone: $15.00 vs $6.00.
What context windows do Claude Sonnet 4 and Grok 4.5 have?
Claude Sonnet 4: 1,000,000 tokens. Grok 4.5: 500,000 tokens.
Who makes Claude Sonnet 4 and Grok 4.5?
Claude Sonnet 4 is made by Anthropic. Grok 4.5 is made by xAI.