GPT-5.2 Chat vs GPT OSS 20B
Compare GPT-5.2 Chat and GPT OSS 20B, both from OpenAI, in 3 community votes, gpt-5.2 chat and gpt oss 20b are closely matched, context windows of 128K vs 131K, tested across 53 shared challenges. Updated April 2026.
Which is better, GPT-5.2 Chat or GPT OSS 20B?
GPT-5.2 Chat and GPT OSS 20B are closely matched based on 3 community votes. GPT-5.2 Chat costs $1.75/M input tokens vs $0.02/M for GPT OSS 20B. Context windows: 128K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.2 Chat and GPT OSS 20B
GPT-5.2 Chat is made by openai while GPT OSS 20B is from openai. GPT-5.2 Chat has a 128K token context window compared to GPT OSS 20B's 131K. On pricing, GPT-5.2 Chat costs $1.75/M input tokens vs $0.02/M for GPT OSS 20B. In community voting, In 3 community votes, GPT-5.2 Chat and GPT OSS 20B are closely matched.
In 3 community votes, GPT-5.2 Chat and GPT OSS 20B are closely matched. GPT-5.2 Chat and GPT OSS 20B perform similarly across challenge categories. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.
Votes are tied. GPT-5.2 Chat is newer and likely incorporates more recent improvements.
GPT OSS 20B is 140x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-5.2 Chat uses 3.0x more emoji
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