Updated March 26, 2026· Based on independent benchmark data
Grok 4.20 Beta 0309 (Reasoning) and Gemini 3 Pro Preview (high) are virtually tied on intelligence (48.5 vs 48.4). For speed, Grok 4.20 Beta 0309 (Reasoning) wins at 246 tok/s vs 115 tok/s.
| Metric | Grok 4.20 Beta 0309 (Reasoning) | Gemini 3 Pro Preview (high) |
|---|---|---|
| Intelligence Score | 48.5 | 48.4 |
| Coding Score | 42.2 | 46.5 |
| Math Score | N/A | 95.7 |
| Speed (tok/s) | 246 tok/s | 115 tok/s |
| Latency (TTFT) | 11.75s | 36.25s |
| Input Price / 1M tokens | $2.00 | $2.00 |
| Output Price / 1M tokens | $6.00 | $12 |
| Context Window | N/A |
Grok 4.20 Beta 0309 (Reasoning) and Gemini 3 Pro Preview (high) perform similarly on overall intelligence, scoring 48.5 and 48.4 respectively. For coding tasks, Gemini 3 Pro Preview (high) has the edge with a coding score of 46.5 vs 42.2.
Grok 4.20 Beta 0309 (Reasoning) generates output significantly faster at 246 tok/s compared to Gemini 3 Pro Preview (high)'s 115 tok/s, making it 2.1x faster for streaming responses. Time to first token is 11.75s for Grok 4.20 Beta 0309 (Reasoning) vs 36.25s for Gemini 3 Pro Preview (high), which affects perceived responsiveness in interactive applications.
Gemini 3 Pro Preview (high) is more affordable at $2.00/1M input tokens ($12/1M output), while Grok 4.20 Beta 0309 (Reasoning) costs $2.00/1M input ($6.00/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, Grok 4.20 Beta 0309 (Reasoning) would cost approximately $12.00/month vs $12.00/month for Gemini 3 Pro Preview (high) in input costs alone.
Choose Grok 4.20 Beta 0309 (Reasoning) when you need faster output (246 tok/s). Choose Gemini 3 Pro Preview (high) when you need stronger coding performance (46.5).
Gemini 3 Pro Preview (high) scores higher on coding benchmarks (46.5 vs 42.2), making it the better choice for programming tasks.
Gemini 3 Pro Preview (high) is cheaper at $2.00/1M input tokens vs $2.00/1M for Grok 4.20 Beta 0309 (Reasoning).
Grok 4.20 Beta 0309 (Reasoning) is faster, producing output at 246 tok/s compared to Gemini 3 Pro Preview (high)'s 115 tok/s.
No, Grok 4.20 Beta 0309 (Reasoning) does not support image input. Neither model supports image input.
Data last synced: March 26, 2026
| N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |
Both models perform similarly on intelligence benchmarks. Choose based on specific needs: pricing, speed, context window, or provider ecosystem.