Compare / head-to-head
GLM-4.5vso3-pro
GLM-4.5 and o3-pro do not yet share a public benchmark, so quality cannot be compared apples-to-apples. GLM-4.5 is 35.7x cheaper per token. o3-pro has the larger context window (200K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0
no overlap yet
Cheaper per token
GLM-4.5
35.7x cheaper, input + output
Larger context
o3-pro
200K tokens
Provider uptime (30d)
— · 94.2446%
Z.ai · OpenAI
Quality
Benchmark matrix
0 shared · 2 only GLM-4.5 · 0 only o3-pro| Benchmark | GLM-4.5 | o3-pro | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 0 | ||||
| No public benchmark is reported for both models yet. | ||||
| Only GLM-4.5 reports · 2 | ||||
| AIME 2025 | 93.3% ↗matharena ⚠ | not reported | — | — |
| LMArena Elo | 1430.2 ↗ | not reported | — | — |
| Only o3-pro reports · 0 | ||||
| o3-pro reports nothing GLM-4.5 does not. | ||||
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 minus o3-pro 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 | o3-pro | Edge |
|---|---|---|---|
| Context window | 128K tokens | 200K tokens | o3-pro |
| Max output | 98K tokens | 100K tokens | o3-pro |
| Input price / 1M | $0.6 ↗ | $20 ↗ | GLM-4.5 |
| Output price / 1M | $2.2 ↗ | $80 ↗ | GLM-4.5 |
| Cached input / 1M | $0.11 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $2.8 | $100 | GLM-4.5 |
| Modalities | text | text · vision | o3-pro |
| Released | — | 2025-06-10 | — |
| Cited benchmark scores | 2 | 0 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GLM-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 and o3-pro on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.