Cheapest place to run gpt-oss-20b

Three providers serve gpt-oss-20b. The dearest costs 2.4× what the cheapest does for the same tokens.

Every host, ranked cheapest first

ProviderInput / 1MOutput / 1MBlended (4:1)Context window
OpenRouterCheapestGPT-OSS 20B$0.03$0.13$0.05131K
Fireworks AIGPT-OSS 20B$0.07$0.30$0.116131K
GroqGPT-OSS 20B$0.075$0.30$0.12131K

Running 10M input / 2.5M output tokens a month costs $0.63 at OpenRouter and $1.50 at Groq — a difference of $0.88 a month.

What this ranking does not tell you

These are list prices for the same open weights served by different providers, nothing more. A cheaper host is not automatically the better one: providers running the same model can still differ in context window, quantisation, throughput, rate limits and region availability, and none of those show up in a price column. Check the provider's own page for the details that matter for your workload before switching.