Compare / head-to-head
GLM-4.5-AirvsGrok 4.5
Grok 4.5 leads 1 of 1 shared benchmark. GLM-4.5-Air is 6.2x cheaper per token. Grok 4.5 has the larger context window (500K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 1
Grok 4.5 leads
Cheaper per token
GLM-4.5-Air
6.2x cheaper, input + output
Larger context
Grok 4.5
500K tokens
Provider uptime (30d)
— · —
Z.ai · xAI
GLM-4.5-Air
Z.ai
text
Quality
Benchmark matrix
1 shared · 1 only GLM-4.5-Air · 5 only Grok 4.5| Benchmark | GLM-4.5-Air | Grok 4.5 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| LMArena Elo | 1383.6 ↗ | 1450.1 ↗ | -66.5 | Grok 4.5 |
| Only GLM-4.5-Air reports · 1 | ||||
| AIME 2025 | 83.3% ↗matharena ⚠ | not reported | — | — |
| Only Grok 4.5 reports · 5 | ||||
| GPQA Diamond | not reported | 93.4% ↗epoch | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 24.4% ↗epoch | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 57.2% ↗epoch | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | not reported | 97.8% ↗epoch | — | — |
| SimpleQA Verified | not reported | 48.3% ↗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-4.5-Air minus Grok 4.5 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-4.5-Air | Grok 4.5 | Edge |
|---|---|---|---|
| Context window | 128K tokens | 500K tokens | Grok 4.5 |
| Max output | 98K tokens | — | — |
| Input price / 1M | $0.2 ↗ | $2 ↗ | GLM-4.5-Air |
| Output price / 1M | $1.1 ↗ | $6 ↗ | GLM-4.5-Air |
| Cached input / 1M | $0.03 ↗ | $0.3 ↗ | GLM-4.5-Air |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $1.3 | $8 | GLM-4.5-Air |
| Modalities | text | text · vision | Grok 4.5 |
| Released | — | 2026-07-08 | — |
| Cited benchmark scores | 2 | 6 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GLM-4.5-Air vs …
Models sharing the most benchmarksMore matchups
Grok 4.5 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GLM-4.5-Air and Grok 4.5 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.