GPT-5.4 vs GPT OSS 20B
Compare GPT-5.4 and GPT OSS 20B, both from OpenAI, in 5 community votes, gpt-5.4 wins 67% of head-to-head duels, context windows of 1.1M vs 131K, tested across 53 shared challenges. Updated April 2026.
Which is better, GPT-5.4 or GPT OSS 20B?
GPT-5.4 is the better choice overall, winning 67% of 5 blind community votes on Rival. GPT-5.4 costs $2.5/M input tokens vs $0.02/M for GPT OSS 20B. Context windows: 1050K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.4 and GPT OSS 20B
GPT-5.4 is made by openai while GPT OSS 20B is from openai. GPT-5.4 has a 1050K token context window compared to GPT OSS 20B's 131K. On pricing, GPT-5.4 costs $2.5/M input tokens vs $0.02/M for GPT OSS 20B. In community voting, In 5 community votes, GPT-5.4 wins 67% of head-to-head duels.
In 5 community votes, GPT-5.4 wins 67% of head-to-head duels. GPT-5.4 leads in Image Generation. Based on blind community voting from the Rival open dataset of 5+ human preference judgments for this pair.
Pick GPT-5.4. In 5 blind votes, GPT-5.4 wins 67% of the time. That's not luck.
GPT-5.4 particularly excels in Image Generation. GPT OSS 20B is 150x cheaper per token — worth considering if cost matters.
Style Comparison
GPT OSS 20B uses 10.2x more emoji
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
