OpenAI: gpt-oss-120b (free) vs OpenAI: GPT-5.4 Pro

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

SpecOpenAI: gpt-oss-120b (free)OpenAI: GPT-5.4 Pro
ProviderOpenAIOpenAI
Context Length131K1.1M
Max Output131K128K
Input Price/1MFree$30
Output Price/1MFree$180
Cache Read/1MFreeFree
Cache Write/1MFreeFree
Input ModalitiesTextText + Image + File
Output ModalitiesTextText
TokenizerGPTGPT
ModeratedYesYes
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OpenAI: gpt-oss-120b (free) vs OpenAI: GPT-5.4 Pro -- AI Model Comparison | AIToolRank