Model comparison · text
gpt-oss-120b vs GLM-5.1
Symmetrical, primary-source facts with unknown values left visible. No winner is assigned without comparable measurements.
FieldAt a glance
OpenAI · activegpt-oss-120bVerified Aug 28, 2026
Z.ai · activeGLM-5.1Verified Aug 28, 2026
Technical differences
Side-by-side facts
| Field | gpt-oss-120b | GLM-5.1 |
|---|---|---|
| Developer | OpenAI | Z.ai |
| Family | Gpt Oss 120b | Glm 5 1 |
| Model | gpt-oss-120b | GLM-5.1 |
| Version | gpt-oss-120b | GLM-5.1 |
| Lifecycle | active | active |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
| Context window | 131072 | 202752 |
| Total parameters | 116829156672 | 753864139008 |
| Active parameters | 5100000000 | Unknown |
| License | apache-2.0 | mit |
| Open weights | Yes | Yes |
| API available | Yes | Yes |
| Self-hostable | Yes | Yes |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
14 comparable fields · 7 material differences · Pair passes the primary-source comparison gate
Primary benchmark evidence
Comparable performance
No protocol-matched benchmark yet.Results appear here only when both models share the same benchmark version, metric, evaluation protocol, and evidence class.
gpt-oss-120b capabilities
Input price$0.037
Output price$0.17
Serving providers5
Canonical IDopenai/gpt-oss-120b
GLM-5.1 capabilities
Input price$1.26
Output price$3.96
Serving providers1
Canonical IDzai-org/GLM-5.1
Internal comparison graph
Related comparisons
Primary evidence