gpt-oss-20b vs gpt-5-nano-2025-08-07

Pricing, Performance & Features Comparison

Price unit:

Authoropenai

Context Length131K

Reasoning

Providers0

ReleasedAug 2025

Knowledge Cutoff-

License-

OpenAI medium-sized open weight model for low latency.

Input-

Output-

Latency (p50)-

Output Limit131K

Function Calling

JSON Mode

InputText

OutputText

Authoropenai

Context Length400K

Reasoning

Providers1

ReleasedAug 2025

Knowledge Cutoff-

License-

GPT-5 Nano is our fastest, cheapest version of GPT-5. It's great for summarization and classification tasks.

Input$0.5

Output$0.4

Latency (p50)2.9s

Output Limit128K

Function Calling

JSON Mode

InputText, Image

OutputText

in$0.5out$0.4-write$0.05