Updated March 26, 2026· Based on independent benchmark data
Claude Opus 4.5 (Reasoning) leads in intelligence with a score of 49.7 vs 46.4. Gemini 3 Flash Preview (Reasoning) is 10.0x cheaper at $0.50/1M tokens vs $5.00/1M. For speed, Gemini 3 Flash Preview (Reasoning) wins at 192 tok/s vs 57 tok/s.
| Metric | Claude Opus 4.5 (Reasoning) | Gemini 3 Flash Preview (Reasoning) |
|---|---|---|
| Intelligence Score | 49.7 | 46.4 |
| Coding Score | 47.8 | 42.6 |
| Math Score | 91.3 | 97.0 |
| Speed (tok/s) | 57 tok/s | 192 tok/s |
| Latency (TTFT) | 10.41s | 6.11s |
| Input Price / 1M tokens | $5.00 | $0.50 |
| Output Price / 1M tokens | $25 | $3.00 |
| Context Window |
Claude Opus 4.5 (Reasoning) outperforms Gemini 3 Flash Preview (Reasoning) on the intelligence index with a score of 49.7 compared to 46.4. For coding tasks, Claude Opus 4.5 (Reasoning) has the edge with a coding score of 47.8 vs 42.6. In mathematical reasoning, Gemini 3 Flash Preview (Reasoning) leads with 97.0 compared to Claude Opus 4.5 (Reasoning)'s 91.3.
Gemini 3 Flash Preview (Reasoning) generates output significantly faster at 192 tok/s compared to Claude Opus 4.5 (Reasoning)'s 57 tok/s, making it 3.4x faster for streaming responses. Time to first token is 6.11s for Gemini 3 Flash Preview (Reasoning) vs 10.41s for Claude Opus 4.5 (Reasoning), which affects perceived responsiveness in interactive applications.
Gemini 3 Flash Preview (Reasoning) is more affordable at $0.50/1M input tokens ($3.00/1M output), while Claude Opus 4.5 (Reasoning) costs $5.00/1M input ($25/1M output). That makes Claude Opus 4.5 (Reasoning) 10.0x more expensive per token, which can add up significantly at scale. For a typical workload of 100 requests per day at 2,000 tokens each, Claude Opus 4.5 (Reasoning) would cost approximately $30.00/month vs $3.00/month for Gemini 3 Flash Preview (Reasoning) in input costs alone.
Choose Claude Opus 4.5 (Reasoning) when you need higher intelligence (49.7), stronger coding performance (47.8). Choose Gemini 3 Flash Preview (Reasoning) when you need faster output (192 tok/s), lower cost.
Claude Opus 4.5 (Reasoning) scores higher on coding benchmarks (47.8 vs 42.6), making it the better choice for programming tasks.
Gemini 3 Flash Preview (Reasoning) is cheaper at $0.50/1M input tokens vs $5.00/1M for Claude Opus 4.5 (Reasoning).
Gemini 3 Flash Preview (Reasoning) is faster, producing output at 192 tok/s compared to Claude Opus 4.5 (Reasoning)'s 57 tok/s.
No, Claude Opus 4.5 (Reasoning) does not support image input. Neither model supports image input.
Data last synced: March 26, 2026
| N/A |
| N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |
It depends on your priorities. Claude Opus 4.5 (Reasoning) scores higher on intelligence (49.7), but Gemini 3 Flash Preview (Reasoning) may be better for specific use cases like budget-conscious projects or speed-critical applications.