Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemini 2.5 Pro Preview (May' 25) | Claude Sonnet 5 (Adaptive Reasoning, Max Effort) |
|---|---|---|
| Input ($/M tokens) | $1.25 | $2 |
| Output ($/M tokens) | $10 | $10 |
Data from Artificial Analysis API — 12 benchmarks
Gemini 2.5 Pro Preview (May' 25) is cheaper overall. Its blended price (3:1 input/output ratio) is $3.44/M tokens vs $4.00/M for Claude Sonnet 5 (Adaptive Reasoning, Max Effort).
Claude Sonnet 5 (Adaptive Reasoning, Max Effort) wins 5 out of 12 benchmarks compared to 3 for Gemini 2.5 Pro Preview (May' 25). See the detailed benchmark chart above for per-category results.
Claude Sonnet 5 (Adaptive Reasoning, Max Effort) generates tokens faster at 87 tok/s vs 0 tok/s. Gemini 2.5 Pro Preview (May' 25) also has lower time-to-first-token (0.00s vs 134.45s).
Choose based on your priorities: Gemini 2.5 Pro Preview (May' 25) for lower cost, Claude Sonnet 5 (Adaptive Reasoning, Max Effort) for stronger benchmark performance, and Claude Sonnet 5 (Adaptive Reasoning, Max Effort) for faster generation. For latency-sensitive apps, check the TTFT comparison above.