OpenAI Codex Mini vs GPT OSS 120B
Compare OpenAI Codex Mini and GPT OSS 120B, both from OpenAI, context windows of 200K vs 131K, tested across 10 shared challenges. Updated April 2026.
Which is better, OpenAI Codex Mini or GPT OSS 120B?
OpenAI Codex Mini and GPT OSS 120B are both competitive models. OpenAI Codex Mini costs $1.5/M input tokens vs $0.18/M for GPT OSS 120B. Context windows: 200K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between OpenAI Codex Mini and GPT OSS 120B
OpenAI Codex Mini is made by openai while GPT OSS 120B is from openai. OpenAI Codex Mini has a 200K token context window compared to GPT OSS 120B's 131K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $0.18/M for GPT OSS 120B.
No community votes yet. On paper, GPT OSS 120B has the edge — bigger model tier, newer.
GPT OSS 120B is 7.5x cheaper per token — worth considering if cost matters.
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.
