GPT 5 Mini vs GPT-OSS 120B
openai/gpt-5-mini · openai/gpt-oss-120b
As of October 24, 2026, GPT-OSS 120B is the cheaper API on UberLLM: $0.0019 per million input tokens and $0.0081 per million output, versus $0.0302 / $0.2414 for GPT 5 Mini — about 97% less on a blended 3:1 token mix. Both are reached through one OpenAI-compatible key and routed to the cheapest healthy seller, with UberLLM's 10% fee already included, so the price you see is the price you pay. Choose GPT-OSS 120B to cut cost; choose GPT 5 Mini when context size wins — GPT 5 Mini carries the larger context window (400,000 vs 131,072 tokens), which can matter for long-document work.
GPT 5 Mini vs GPT-OSS 120B, side by side
| Spec | GPT 5 Mini | GPT-OSS 120B |
|---|---|---|
| Price · input / 1M | $0.0302 | $0.0019 |
| Price · output / 1M | $0.2414 | $0.0081 |
| Context length | 400,000 | 131,072 |
| Max output tokens | 128,000 | 32,768 |
| Input modalities | text | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Cheapest seller | UberLLM | UberLLM |
| % off list | 88% off | 97% off |
Live prices via UberLLM, routed to the cheapest healthy seller. The price shown includes UberLLM’s 10% fee. Updated October 24, 2026.
GPT 5 Mini vs GPT-OSS 120B — FAQ
Is GPT 5 Mini or GPT-OSS 120B cheaper?
GPT-OSS 120B is cheaper on a blended token mix, by about 97%. UberLLM routes every request to the cheapest healthy seller and bills the price shown, with its 10% fee included.
What's the price difference between GPT 5 Mini and GPT-OSS 120B?
GPT 5 Mini: $0.0302 in / $0.2414 out per 1M tokens. GPT-OSS 120B: $0.0019 in / $0.0081 out per 1M tokens. That's roughly a 97% blended difference. Prices are live and include UberLLM's 10% fee.
Can I use both GPT 5 Mini and GPT-OSS 120B with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.