Compare / head-to-head
GLM-4.5-Flashvsgpt-oss-20b
GLM-4.5-Flash and gpt-oss-20b do not yet share a public benchmark, so quality cannot be compared apples-to-apples. GLM-4.5-Flash 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
—
list price, input + output
Larger context
GLM-4.5-Flash
200K tokens
Provider uptime (30d)
— · 94.5017%
Z.ai · OpenAI
GLM-4.5-Flash
Z.ai
text
gpt-oss-20b
OpenAI · released 2025-08-05
text
- Context
- 131K
- Max out
- 131K
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 6 · 5 core
Quality
Benchmark matrix
0 shared · 0 only GLM-4.5-Flash · 5 only gpt-oss-20b| Benchmark | GLM-4.5-Flash | gpt-oss-20b | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 0 | ||||
| No public benchmark is reported for both models yet. | ||||
| Only GLM-4.5-Flash reports · 0 | ||||
| GLM-4.5-Flash reports nothing gpt-oss-20b does not. | ||||
| Only gpt-oss-20b reports · 5 | ||||
| SWE-bench Verified | not reported | 60.7% ↗ | — | — |
| GPQA Diamond | not reported | 71.5% ↗ | — | — |
| AIME 2025 | not reported | 89.2% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1287.3 ↗ | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | not reported | 65.3% ↗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-Flash minus gpt-oss-20b 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-Flash | gpt-oss-20b | Edge |
|---|---|---|---|
| Context window | 200K tokens | 131K tokens | GLM-4.5-Flash |
| Max output | 98K tokens | 131K tokens | gpt-oss-20b |
| Input price / 1M | $0 ↗ | — | — |
| Output price / 1M | $0 ↗ | — | — |
| Cached input / 1M | $0 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0 | — | — |
| Modalities | text | text | Tie |
| Released | — | 2025-08-05 | — |
| Cited benchmark scores | 0 | 6 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
gpt-oss-20b vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GLM-4.5-Flash and gpt-oss-20b on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.