Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | DeepSeek R1 0528 (May '25) | GLM-5.1 (Reasoning) |
|---|---|---|
| Input ($/M tokens) | $1.35 | $1.4 |
| Output ($/M tokens) | $4.2 | $4.4 |
Data from Artificial Analysis API — 12 benchmarks
DeepSeek R1 0528 (May '25) is cheaper overall. Its blended price (3:1 input/output ratio) is $2.06/M tokens vs $2.15/M for GLM-5.1 (Reasoning).
GLM-5.1 (Reasoning) wins 7 out of 12 benchmarks compared to 5 for DeepSeek R1 0528 (May '25). See the detailed benchmark chart above for per-category results.
GLM-5.1 (Reasoning) generates tokens faster at 54 tok/s vs 0 tok/s. DeepSeek R1 0528 (May '25) also has lower time-to-first-token (0.00s vs 0.86s).
Choose based on your priorities: DeepSeek R1 0528 (May '25) for lower cost, GLM-5.1 (Reasoning) for stronger benchmark performance, and GLM-5.1 (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.