OpenAI: gpt-oss-120b — pricing & benchmarks

By openai · Updated 2026-10-06 · Open weights · apache-2.0cheap high-volumestep-by-step reasoningopen weights / self-hostable

What OpenAI: gpt-oss-120b is used for

OpenAI: gpt-oss-120b is best suited for cheap high-volume, step-by-step reasoning, open weights / self-hostable. Access it through one Appmo API key alongside 458 other models — Appmo's optimizer can route to it automatically when it is the best value for a request. Weights: huggingface.co/openai/gpt-oss-120b.

Use it via the Appmo API (OpenAI-compatible)

curl https://appmo.com/v1/chat/completions \
  -H "Authorization: Bearer $APPMO_KEY" \
  -d '{"model":"openai/gpt-oss-120b","messages":[{"role":"user","content":"Hello"}]}'

FAQ

How much does OpenAI: gpt-oss-120b cost?
OpenAI: gpt-oss-120b costs $0.037 per 1M input tokens and $0.17 per 1M output tokens ($0.07 blended), as of 2026-10-06. Prices are expected to fall as competition increases.

What is OpenAI: gpt-oss-120b best for?
OpenAI: gpt-oss-120b is best suited for cheap high-volume, step-by-step reasoning, open weights / self-hostable.

How do I use OpenAI: gpt-oss-120b?
Send requests to Appmo's OpenAI-compatible endpoint with model id "openai/gpt-oss-120b" and one API key — no separate provider account needed.

Is OpenAI: gpt-oss-120b open source?
Yes — its weights are public on Hugging Face (openai/gpt-oss-120b) under the apache-2.0 license; check the license terms before commercial use.

Can OpenAI: gpt-oss-120b create images?
No, OpenAI: gpt-oss-120b works with text.