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Models › openai › OpenAI: gpt-oss-120b

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

By openai · Updated 2026-07-24 · cheap high-volumestep-by-step reasoning

OpenAI: gpt-oss-120b costs $0.037 per 1M input tokens and $0.17 per 1M output tokens, with a 131K context window. It is best suited for cheap high-volume, step-by-step reasoning, and is available through one OpenAI-compatible Appmo API key.
$0.037Input / 1M
$0.17Output / 1M
131KContext
—Intelligence
—Coding
—GPQA %
—Speed tok/s

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

OpenAI: gpt-oss-120b is best suited for cheap high-volume, step-by-step reasoning. Access it through one Appmo API key alongside 390 other models — Appmo's optimizer can route to it automatically when it is the best value for a request.

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 2026-07-24. 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.

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.