Model comparison · text
GPT-5.6 Luna vs gpt-oss-120b
Symmetrical, primary-source facts with unknown values left visible. No winner is assigned without comparable measurements.
FieldAt a glance
OpenAI · activeGPT-5.6 LunaVerified Aug 28, 2026
OpenAI · activegpt-oss-120bVerified Aug 28, 2026
Technical differences
Side-by-side facts
| Field | GPT-5.6 Luna | gpt-oss-120b |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Family | Gpt 5 6 | Gpt Oss 120b |
| Model | GPT-5.6 Luna | gpt-oss-120b |
| Version | GPT-5.6 Luna | gpt-oss-120b |
| Lifecycle | active | active |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 1050000 | 131072 |
| Total parameters | Unknown | 116829156672 |
| Active parameters | Unknown | 5100000000 |
| License | Unknown | apache-2.0 |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
12 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-5.6 Luna capabilities
Input price$0.20
Output price$1.20
Serving providers1
Canonical IDopenai/gpt-5.6-luna
gpt-oss-120b capabilities
Input price$0.037
Output price$0.17
Serving providers5
Canonical IDopenai/gpt-oss-120b
Internal comparison graph
Related comparisons
Primary evidence