gpt-oss-20b vs DeepSeek Flash Latest: pricing comparison
DeepSeek Flash Latest is the cheaper option at $0.00/$2.40 per 1M input/output tokens — gpt-oss-20b ($0.02/$0.09) costs about 6.0x more per input token. Full spec-by-spec breakdown below.
| gpt-oss-20b | DeepSeek Flash Latest | |
|---|---|---|
| Input /1M tokens | $0.02 | $0.00 |
| Output /1M tokens | $0.09 | $2.40 |
| Cache read /1M | $0.01 | $0.00 |
| Context window | 131K | 1.0M |
| Provider | OpenAI | ~deepseek |
| Vision input | No | Yes |
| Released | Aug 2025 | Sep 2026 |
Real workload costs: gpt-oss-20b vs DeepSeek Flash Latest
Cost per single request at common token profiles — the cheapest model for each workload is highlighted.
| Workload | Tokens (in / out) | gpt-oss-20b | DeepSeek Flash Latest |
|---|---|---|---|
| Chatbot message | 500 / 300 | <$0.0001 | $0.0007 |
| RAG query with context | 4,000 / 500 | $0.0001 | $0.0012 |
| Document summarization | 20,000 / 1,000 | $0.0004 | $0.0025 |
| Agent coding session | 100,000 / 5,000 | $0.0022 | $0.01 |
Frequently asked questions
Which is cheaper: gpt-oss-20b vs DeepSeek Flash Latest?
DeepSeek Flash Latest is the cheapest on input tokens at $0.00 per 1M, and gpt-oss-20b is cheapest on output at $0.09 per 1M. gpt-oss-20b costs about 6.0x more per input token than DeepSeek Flash Latest.
How much does gpt-oss-20b cost per 1M tokens?
gpt-oss-20b costs $0.02 per 1M input tokens and $0.09 per 1M output tokens on the OpenAI API, with a 131K-token context window.
How much does DeepSeek Flash Latest cost per 1M tokens?
DeepSeek Flash Latest costs $0.00 per 1M input tokens and $2.40 per 1M output tokens on the ~deepseek API, with a 1.0M-token context window.
What does a typical request cost on gpt-oss-20b vs DeepSeek Flash Latest?
For a typical request with 2,000 input and 500 output tokens: gpt-oss-20b costs <$0.0001, DeepSeek Flash Latest costs $0.0012. At 1,000 requests/day for a month that is $2.43 for gpt-oss-20b vs $36.18 for DeepSeek Flash Latest.
Estimate your own workload with the per-model calculators (gpt-oss-20b, DeepSeek Flash Latest), browse all current prices on the live model pricing dashboard, or run these models head-to-head on a real prompt (free account required). Prices may differ from provider list prices for batch or tiered usage.
Pricing data via the OpenRouter models API.