Models / Compare /gpt-oss-120b vs GLM 5.1
Head to head
gpt-oss-120b vs GLM 5.1
Compared on live catalog data — pricing synced daily, benchmark scores with provenance.
The short version
- gpt-oss-120b is cheaper to run hosted: $0.17/M output vs $3.04/M for GLM 5.1 (17.9× difference at the cheapest tracked provider).
- GLM 5.1 takes 205K tokens of context vs 131K for gpt-oss-120b.
- GLM 5.1 scores 1518.4089 on Arena Coding vs 1390.1368 for gpt-oss-120b.
- GLM 5.1 scores 1448.0723 on Arena Creative Writing vs 1277.4859 for gpt-oss-120b.
| Spec | ||
|---|---|---|
| Vendor | OpenAI | Z.AI |
| Parameters | 120B | 754B |
| 131K | 205K | |
| Weights | OPEN | OPEN |
| License | Apache License 2.0 | MIT License |
| Modality | text->text | text->text |
| Released | Aug 4, 2025 | Apr 3, 2026 |
| 75.9 GBest | 475.3 GBest | |
| Cheapest hosted | $0.037 / $0.17 per 1M (OpenRouter) | $0.97 / $3.04 per 1M (OpenRouter) |
| Tracked providers | 23 | 23 |
gpt-oss-120b — our take
gpt-oss-120b is OpenAI's first downloadable model, released in 2025 with a permissive Apache licence and a 120.4-billion-parameter dense architecture. It offers broad measured coverage across chat, coding and creative tasks, though its scores vary sharply by category and it is text-only.
full breakdown →GLM 5.1 — our take
GLM 5.1 is a large downloadable text model from Z.AI with a permissive MIT licence and a 204,800-token request limit. Its strongest measured skill is coding, though creative writing lags well behind, and no active-parameter count is disclosed.
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