GLM-5.1 (Reasoning) vs Qwen3.8-Flash-Next
Which is better for the money: GLM-5.1 (Reasoning) by Z AI or Qwen3.8-Flash-Next by Alibaba? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Clear winner
Verdict
Pick Qwen3.8-Flash-Next
Qwen3.8-Flash-Next vs GLM-5.1 (Reasoning): 52.5% more intelligence, 75.6% less cost to run the AA benchmark, and 21.5% faster end-to-end.
| Metric | GLM-5.1 (Reasoning) | Qwen3.8-Flash-Next | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.1 | 39.8 | +52.5% Qwen3.8-Flash-Next is 52.5% more intelligent |
| Total AA cost (lower is better) | $1,486.78 | $362.72 | −75.6% Qwen3.8-Flash-Next is 75.6% cheaper |
| End-to-end time (lower is better) | 64.38s | 50.52s | −21.5% Qwen3.8-Flash-Next is 21.5% faster |
| Price per 1M tokens (in / out) | $1.28 / $4.07 | $0.15 / $0.47 | |
| Input modalities | Text | Text, Image, Video |
Today's Pareto frontier
Against the frontier
- GLM-5.1 (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- Qwen3.8-Flash-Next is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
GLM-5.1 (Reasoning)Qwen3.8-Flash-NextToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
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