GPT OSS 120B vs GPT-4o-mini
Both have similar output pricing, while GPT OSS 120B offers a larger context window. Choose GPT OSS 120B or GPT-4o-mini based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT OSS 120B | GPT-4o-mini |
|---|---|---|
| Provider | Neon | OpenAI |
| Input / 1M tokens | $0.15 | $0.15 |
| Output / 1M tokens | $0.60 | $0.60 |
| Context window | 131K | 128K |
| Parameters | 117B | — |
| Open weights | Yes | No |
| Released | Aug 2025 | Jul 2024 |
| LiveBench score | 46.4 | — |
| Aider Polyglot score | 41.8 | 3.6 |
| LMArena (Chatbot Arena) Elo score | — | 1286 |
| LMArena Vision Elo score | — | 1066 |
| GPQA Diamond score | — | 37.7 |
| Epoch Capabilities Index score | — | 127 |
FAQ
Is GPT OSS 120B or GPT-4o-mini cheaper?
GPT OSS 120B and GPT-4o-mini have comparable output pricing.
Which has the larger context window, GPT OSS 120B or GPT-4o-mini?
GPT OSS 120B has the larger context window (131K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.