OpenAI: gpt-oss-20b vs OpenAI: GPT-5.4

Side-by-side model comparison based on OpenRouter API data.

SpecOpenAI: gpt-oss-20bOpenAI: GPT-5.4
ProviderOpenAIOpenAI
Context Length131K1.1M
Max Output131K128K
Input Price/1M$0.03$2.50
Output Price/1M$0.11$15
Cache Read/1M$0.01$0.25
Cache Write/1MFreeFree
Input ModalitiesTextText + Image + File
Output ModalitiesTextText
TokenizerGPTGPT
ModeratedNoYes