GPT-OSS 120B pricing
GPT-OSS 120B, Mid-tier from OpenRouter, costs $0.037 per 1M input tokens and $0.17 per 1M output tokens.
Input$0.037per 1M tokens
Output$0.17per 1M tokens
Context window131Ktokens
TierMidOpenRouter
Price your own workload against GPT-OSS 120B in the calculator →
Specs and pricing
| Provider | OpenRouter |
| Tier | Mid |
| Context window | 131K tokens |
| Max output | 118K tokens |
| Input price | $0.037 / 1M tokens |
| Output price | $0.17 / 1M tokens |
| Modalities | text |
Note. OpenRouter's default route for this model; several dozen independent backends host it at different prices, this is only the one OpenRouter routes to by default.
What it costs at realistic volumes
Assuming a 4:1 input:output token ratio, a common shape for chat and RAG-style workloads:
| Volume (4:1 in:out ratio) | Input cost | Output cost | Total / month |
|---|---|---|---|
| 1,000,000 in / 250,000 out | $0.04 | $0.04 | $0.08 |
| 10,000,000 in / 2,500,000 out | $0.37 | $0.43 | $0.80 |
| 100,000,000 in / 25,000,000 out | $3.70 | $4.25 | $7.95 |
Cheaper alternatives
Same tier (Mid), a different provider, and a lower blended cost at the 4:1 ratio used above:
No same-tier model from another provider is cheaper than GPT-OSS 120B at a 4:1 input:output ratio, as of 2026-08-29.