Compare / head-to-head
GLM-5vsGLM-5.1
GLM-5.1 leads 4 of 5 shared benchmarks. GLM-5 is 1.4x cheaper per token. Both offer a 200K-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 4
GLM-5.1 leads
Cheaper per token
GLM-5
1.4x cheaper, input + output
Larger context
Tie
both 200K tokens
Provider uptime (30d)
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Z.ai
Quality
Benchmark matrix
5 shared · 3 only GLM-5 · 2 only GLM-5.1| Benchmark | GLM-5 | GLM-5.1 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| GPQA Diamond | 87.8% ↗epoch | 89.9% ↗epoch | -2.1 pt | GLM-5.1 |
| AIME 2026 | 96.7% ↗matharena ⚠ | 95.8% ↗matharena ⚠ | +0.9 pt | GLM-5 |
| LMArena Elo | 1446.3 ↗ | 1462.4 ↗ | -16.1 | GLM-5.1 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 80% ↗epoch | 93.3% ↗epoch | -13.3 pt | GLM-5.1 |
| SWE-bench Verified (Epoch AI run) | 72.1% ↗epoch | 74.2% ↗epoch | -2.1 pt | GLM-5.1 |
| Only GLM-5 reports · 3 | ||||
| SWE-bench Verified | 77.8% ↗ | not reported | — | — |
| AIME 2025 | 96.7% ↗matharena ⚠ | not reported | — | — |
| Terminal-Bench 2.0 | 56.2% ↗ | not reported | — | — |
| Only GLM-5.1 reports · 2 | ||||
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 36.8% ↗epoch | — | — |
| SimpleQA Verified | not reported | 34% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is GLM-5 minus GLM-5.1 in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | GLM-5 | GLM-5.1 | Edge |
|---|---|---|---|
| Context window | 200K tokens | 200K tokens | Tie |
| Max output | 131K tokens | 131K tokens | Tie |
| Input price / 1M | $1 ↗ | $1.4 ↗ | GLM-5 |
| Output price / 1M | $3.2 ↗ | $4.4 ↗ | GLM-5 |
| Cached input / 1M | $0.2 ↗ | $0.26 ↗ | GLM-5 |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $4.2 | $5.8 | GLM-5 |
| Modalities | text | text | Tie |
| Released | — | 2026-04-07 | — |
| Cited benchmark scores | 8 | 7 | — |
Reliability
Z.ai status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GLM-5 vs …
Models sharing the most benchmarksMore matchups
GLM-5.1 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GLM-5 and GLM-5.1 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.