Gemini 3.5 Flash vs Grok 4.1 Fast
Head to head on 23 shared benchmarks, with price, context window, and release dates.
Benchmark scores
38evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 71.8 | 92.2% | 42.7% | 76.3% | 78.9% | 78.2% | 64.9% | 75.6% | 84.6% | 88.2% | 82.0% | 76.3% | 55.8% | 76.6% | 68.1% | 31.0% | 49.9% | 53.1% | 74.4% | 40.9% | 48.7% | 95.3% | - | - | 26.0% | 1087elo | - | 57.9% | 39.0% | - | - | - | - | - | - | 53.1% | 62.9% | 64.3% |
| Grok 4.1 Fast xAI | 66.0% | 40.1 | 85.3% | 19.3% | 52.7% | 64.7% | 69.6% | 52.2% | 28.2% | 74.3% | 83.7% | 80.2% | 60.8% | 28.1% | 78.7% | 42.6% | 4.0% | 31.3% | 44.2% | 73.1% | 24.2% | 1.2% | 93.3% | 62.0% | 89.3% | - | - | 1324elo | - | - | 11.8 | 35.0% | 80.2% | 82.2% | 100.0% | 85.4% | - | - | 58.3% |
2 / 2 models
| Attribute | Gemini 3.5 Flash Google (Alphabet Inc.) | Grok 4.1 Fast xAI |
|---|---|---|
| Description | Gemini 3.5 Flash is an AI model from Google (Alphabet Inc.). | Grok 4.1 Fast is an AI model from xAI. |
| Family | Gemini | Grok |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 19 May 2026 | 19 Nov 2025 |
| Context | 1,048,576 | - |
| Input $/1M | $1.50 | - |
| Output $/1M | $9.00 | - |
| Cache read $/1M | $0.150 | - |
| Cache write $/1M | $0.083 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, video, file, audio | text |
| Providers | - | - |
| Publisher | Google (Alphabet Inc.) | xAI |
| Reported scores | Humanity's Last Exam (HLE)42.7% (AA) τ²-bench (Tau²-bench)95.3% (AA) Terminal-Bench (Hard)40.9% (AA) Vals Index53.1% | Infraresolutionbench80.2% (150 samples) Agent Diff Bench62.0% (179 samples) Medpt100.0% (15 samples) Hanabi11.8 (15 samples) SciCode44.2% (AA) |
FAQ
- Is Gemini 3.5 Flash or Grok 4.1 Fast better?
- Across the 23 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 21 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Gemini 3.5 Flash and Grok 4.1 Fast compare on GPQA Diamond?
- Gemini 3.5 Flash scores 92.2% and Grok 4.1 Fast scores 85.3% on GPQA Diamond.
- When were Gemini 3.5 Flash and Grok 4.1 Fast released?
- Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.). Grok 4.1 Fast was released 19 Nov 2025 by xAI.
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