gpt-oss-20b pricing & benchmarks
gpt-oss-20b is available from OpenAI at $0.030 per million input tokens and $0.130 per million output tokens ($0.055 blended at 3:1). It accepts up to 131,072 tokens of context. gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...
Pricing
Per million tokens · OpenRouter
Input$0.030
Output$0.130
Blended (3:1)$0.055
Specification
openai/gpt-oss-20b
Context window131K
Max output131K
ReleasedAug 2025
LicenceOpen weights
Modalitiesin:text, out:text
No independently-run benchmark scores are published for gpt-oss-20b yet. We show nothing rather than reprinting an unverified figure.
Where to run gpt-oss-20b
12 options across 11 providers · 2.4× between cheapest and dearest. Blended at 3:1. ⚠ marks an option serving less context than the best available, or re-pricing above a prompt-length threshold. Bracketed labels are the provider's own service tier or region.
| Host | Blended $/1M | In / Out | Context | Weights | Uptime 24h |
|---|---|---|---|---|---|
| CoreWeave | $0.055 | $0.030 / $0.130 | 131K | fp4 | 99.2% |
| DeepInfra | $0.058 | $0.030 / $0.140 | 131K | bf16 | 99.8% |
| Parasail | $0.060 | $0.030 / $0.150 | 131K | fp4 | 81.5% |
| Novita | $0.068 | $0.040 / $0.150 | 131K | fp4 | 95.9% |
| Phala | $0.068 | $0.040 / $0.150 | 131K | — | 92.7% |
| SiliconFlow | $0.075 | $0.040 / $0.180 | 131K | fp8 | 97.6% |
| Together | $0.087 | $0.050 / $0.200 | 131K | — | 97.5% |
| Amazon Bedrock (eu-west-1) | $0.090 | $0.070 / $0.150 | 131K | — | — |
| Amazon Bedrock | $0.090 | $0.070 / $0.150 | 131K | — | 99.8% |
| Google (us-central1) | $0.115 | $0.070 / $0.250 | 131K | — | 58.1% |
| Fireworks | $0.128 | $0.070 / $0.300 | 131K | — | — |
| Groq | $0.131 | $0.075 / $0.300 | 131K | — | 99.4% |
Host prices and uptime from OpenRouter, synced 2026-08-08. Lower-precision weights (fp4, fp8) can cost less and score worse than the same model at bf16 — the score above is not host-specific.
Compare gpt-oss-20b
FAQ
How much does gpt-oss-20b cost?
gpt-oss-20b costs $0.030 per million input tokens and $0.130 per million output tokens on OpenRouter. At a 3:1 input:output mix that blends to $0.055 per million tokens.
What is gpt-oss-20b's context window?
gpt-oss-20b accepts up to 131,072 tokens of context, and can generate up to 131,072 output tokens.