token.app › Compare › GPT-5.4 vs Grok 4.5
GPT-5.4 vs Grok 4.5
GPT-5.4 and Grok 4.5 split the 5 shared benchmarks evenly. Grok 4.5 is 1.9× cheaper per token on a blended 3:1 basis. GPT-5.4 accepts the larger context window (1.1M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.4 | Grok 4.5 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Input $/1M | $2.50 | $2.00 |
| Output $/1M | $15.00 | $6.00 |
| Blended $/1M | $5.63 | $3.00 |
| Context window | 1.1M | 500K |
| Max output | 128K | — |
| Released | Mar 2026 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 93.3% | 93.4% |
| FrontierMath T1–3 | 78.6% | 57.2% |
| FrontierMath T4 | 49.0% | 24.4% |
| SimpleQA Verified | 44.8% | 53.5% |
| OTIS Mock AIME | 97.8% | 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 GPT-5.4 if…
- Higher FrontierMath T1–3 (78.6% vs 57.2%)
- Higher FrontierMath T4 (49.0% vs 24.4%)
- Larger context window (1.1M)
Choose Grok 4.5 if…
- Costs less per token — $3.00 vs $5.63 blended
- Higher GPQA Diamond (93.4% vs 93.3%)
- Higher SimpleQA Verified (53.5% vs 44.8%)
- Newer model (released Jul 2026)
FAQ
Which is better, GPT-5.4 or Grok 4.5?
Across the 5 benchmarks both models have independently-run scores for, GPT-5.4 leads on 2 and Grok 4.5 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is GPT-5.4 cheaper than Grok 4.5?
Grok 4.5 is cheaper: $3.00 versus $5.63 per million tokens blended at 3:1 input:output. Input alone: $2.50 vs $2.00. Output alone: $15.00 vs $6.00.
What context windows do GPT-5.4 and Grok 4.5 have?
GPT-5.4: 1,050,000 tokens. Grok 4.5: 500,000 tokens.
Who makes GPT-5.4 and Grok 4.5?
GPT-5.4 is made by OpenAI. Grok 4.5 is made by xAI.