Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | gpt-oss-120b (low) | Mercury 2 |
|---|---|---|
| Input ($/M tokens) | $0.15 | $0.25 |
| Output ($/M tokens) | $0.6 | $0.75 |
Data from Artificial Analysis API — 12 benchmarks
gpt-oss-120b (low) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.26/M tokens vs $0.38/M for Mercury 2.
Mercury 2 wins 6 out of 12 benchmarks compared to 4 for gpt-oss-120b (low). See the detailed benchmark chart above for per-category results.
Mercury 2 generates tokens faster at 1108 tok/s vs 331 tok/s. gpt-oss-120b (low) also has lower time-to-first-token (0.50s vs 3.08s).
Choose based on your priorities: gpt-oss-120b (low) for lower cost, Mercury 2 for stronger benchmark performance, and Mercury 2 for faster generation. For latency-sensitive apps, check the TTFT comparison above.