Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemma 4 12B (Reasoning) | GPT-5.5 (medium) |
|---|---|---|
| Input ($/M tokens) | $0 | $5 |
| Output ($/M tokens) | $0 | $30 |
Data from Artificial Analysis API — 12 benchmarks
Gemma 4 12B (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $11.25/M for GPT-5.5 (medium).
GPT-5.5 (medium) wins 6 out of 12 benchmarks compared to 1 for Gemma 4 12B (Reasoning). See the detailed benchmark chart above for per-category results.
GPT-5.5 (medium) generates tokens faster at 49 tok/s vs 0 tok/s. Gemma 4 12B (Reasoning) also has lower time-to-first-token (0.00s vs 9.05s).
Choose based on your priorities: Gemma 4 12B (Reasoning) for lower cost, GPT-5.5 (medium) for stronger benchmark performance, and GPT-5.5 (medium) for faster generation. For latency-sensitive apps, check the TTFT comparison above.