token.app › Compare › Gemini 3.5 Flash vs Grok 4.5
Gemini 3.5 Flash vs Grok 4.5
Gemini 3.5 Flash leads on 3 of 5 shared benchmarks. Grok 4.5 is 1.1× cheaper per token on a blended 3:1 basis. Gemini 3.5 Flash accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| Gemini 3.5 Flash | Grok 4.5 | |
|---|---|---|
| Provider | xAI | |
| Input $/1M | $1.50 | $2.00 |
| Output $/1M | $9.00 | $6.00 |
| Blended $/1M | $3.38 | $3.00 |
| Context window | 1.0M | 500K |
| Max output | 66K | — |
| Released | May 2026 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 92.8% | 93.4% |
| FrontierMath T1–3 | 62.8% | 57.2% |
| FrontierMath T4 | 26.8% | 24.4% |
| SimpleQA Verified | 68.4% | 53.5% |
| OTIS Mock AIME | 95.6% | 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 Gemini 3.5 Flash if…
- Higher FrontierMath T1–3 (62.8% vs 57.2%)
- Higher FrontierMath T4 (26.8% vs 24.4%)
- Higher SimpleQA Verified (68.4% vs 53.5%)
- Larger context window (1.0M)
Choose Grok 4.5 if…
- Costs less per token — $3.00 vs $3.38 blended
- Higher GPQA Diamond (93.4% vs 92.8%)
- Higher OTIS Mock AIME (97.8% vs 95.6%)
- Newer model (released Jul 2026)
FAQ
Which is better, Gemini 3.5 Flash or Grok 4.5?
Across the 5 benchmarks both models have independently-run scores for, Gemini 3.5 Flash leads on 3 and Grok 4.5 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is Gemini 3.5 Flash cheaper than Grok 4.5?
Grok 4.5 is cheaper: $3.00 versus $3.38 per million tokens blended at 3:1 input:output. Input alone: $1.50 vs $2.00. Output alone: $9.00 vs $6.00.
What context windows do Gemini 3.5 Flash and Grok 4.5 have?
Gemini 3.5 Flash: 1,048,576 tokens. Grok 4.5: 500,000 tokens.
Who makes Gemini 3.5 Flash and Grok 4.5?
Gemini 3.5 Flash is made by Google. Grok 4.5 is made by xAI.
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