token.app › Compare › Grok 4.5 vs GPT-5.6 Sol
Grok 4.5 vs GPT-5.6 Sol
GPT-5.6 Sol leads on 5 of 5 shared benchmarks. Grok 4.5 is 3.8× cheaper per token on a blended 3:1 basis. GPT-5.6 Sol accepts the larger context window (1.1M).
Head to head
Blended price uses a 3:1 input:output mix
| Grok 4.5 | GPT-5.6 Sol | |
|---|---|---|
| Provider | xAI | OpenAI |
| Input $/1M | $2.00 | $5.00 |
| Output $/1M | $6.00 | $30.00 |
| Blended $/1M | $3.00 | $11.25 |
| Context window | 500K | 1.1M |
| Max output | — | 128K |
| Released | Jul 2026 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 93.4% | 93.5% |
| FrontierMath T1–3 | 57.2% | 89.1% |
| FrontierMath T4 | 24.4% | 82.9% |
| SimpleQA Verified | 53.5% | 71.6% |
| OTIS Mock AIME | 97.8% | 100.0% |
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 Grok 4.5 if…
- Costs less per token — $3.00 vs $11.25 blended
Choose GPT-5.6 Sol if…
- Higher GPQA Diamond (93.5% vs 93.4%)
- Higher FrontierMath T1–3 (89.1% vs 57.2%)
- Higher FrontierMath T4 (82.9% vs 24.4%)
- Higher SimpleQA Verified (71.6% vs 53.5%)
- Larger context window (1.1M)
- Newer model (released Jul 2026)
FAQ
Which is better, Grok 4.5 or GPT-5.6 Sol?
Across the 5 benchmarks both models have independently-run scores for, Grok 4.5 leads on 0 and GPT-5.6 Sol leads on 5. Benchmarks are one input — price and context window are on this page too.
Is Grok 4.5 cheaper than GPT-5.6 Sol?
Grok 4.5 is cheaper: $3.00 versus $11.25 per million tokens blended at 3:1 input:output. Input alone: $2.00 vs $5.00. Output alone: $6.00 vs $30.00.
What context windows do Grok 4.5 and GPT-5.6 Sol have?
Grok 4.5: 500,000 tokens. GPT-5.6 Sol: 1,050,000 tokens.
Who makes Grok 4.5 and GPT-5.6 Sol?
Grok 4.5 is made by xAI. GPT-5.6 Sol is made by OpenAI.