Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | LongCat 2.0 | GPT-5.5 (medium) |
|---|---|---|
| Input ($/M tokens) | $0 | $5 |
| Output ($/M tokens) | $0 | $30 |
Data from Artificial Analysis API — 12 benchmarks
LongCat 2.0 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 7 out of 12 benchmarks compared to 0 for LongCat 2.0. See the detailed benchmark chart above for per-category results.
GPT-5.5 (medium) generates tokens faster at 68 tok/s vs 0 tok/s. LongCat 2.0 also has lower time-to-first-token (0.00s vs 5.42s).
Choose based on your priorities: LongCat 2.0 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.