OpenAI: gpt-oss-20b (free) vs OpenAI: GPT-5.3 Chat

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

SpecOpenAI: gpt-oss-20b (free)OpenAI: GPT-5.3 Chat
ProviderOpenAIOpenAI
Context Length131K128K
Max Output131K16K
Input Price/1MFree$1.75
Output Price/1MFree$14
Cache Read/1MFree$0.17
Cache Write/1MFreeFree
Input ModalitiesTextText + Image + File
Output ModalitiesTextText
TokenizerGPTGPT
ModeratedYesYes
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