OpenAI: gpt-oss-20b (batch) API Pricing
OpenAI: gpt-oss-20b (batch) costs $0.024 per 1M input tokens and $0.112 per 1M output tokens. Context window: 131K. Prices verified 2026-10-21 · source
Alternatives to consider
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Cheapest openai model — 22% less per month
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Higher effort = deeper thinking = more reasoning tokens billed as output.
Training data ends here — newer events require retrieval or web search.
What would OpenAI: gpt-oss-20b (batch) cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $0.64 |
| Coding agent | 5,000 | 8,000 / 2,000 | $2.08 |
| RAG pipeline | 30,000 | 4,000 / 500 | $4.56 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $1.18 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About OpenAI: gpt-oss-20b (batch)
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...
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Popular head-to-heads — see all on the comparisons index.
Frequently asked questions
How much does OpenAI: gpt-oss-20b (batch) cost?
OpenAI: gpt-oss-20b (batch) costs $0.024 per 1M input tokens and $0.112 per 1M output tokens. Verified 2026-10-21 — provider source.
What is the context window?
131K tokens, with up to 118K output tokens per response. That's roughly 164 pages of text in a single request.
Does it support prompt caching?
Prompt-caching pricing is not published for this model via OpenRouter.
What's a cheaper alternative?
Check the value chart for models with similar intelligence at lower cost.
Official resources
- OpenAI: gpt-oss-20b (batch) on OpenRouter — live endpoint, pricing source of record.
- Artificial Analysis leaderboard → — independent intelligence and performance rankings.
- OpenAI pricing → — first-party pricing and billing details.
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