deepseek
gpt-oss-20b vs DeepSeek V4 Flash 0423
65.5 overall · $0.061 / 1M
// openai
gpt-oss-20b
openai/gpt-oss-20b
reasoningtool calling
gpt-oss-20b costs $0.018 per 1M input tokens and $0.090 per 1M output tokens with a 131K-token context window.
A reasoning, tool-calling model from openai, released Aug 5, 2025. LiveBench hasn't published a run for it, so this page carries measured price and specs only — no benchmark numbers.
- Input / 1M
- $0.018
- Output / 1M
- $0.090
- Context
- 131K
- LiveBench overall
- Not evaluated
Specs and pricing
| Input price USD per 1M prompt tokens | $0.018 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $0.090 |
| Blended price 3:1 input:output — #10 cheapest of 343 listed models | $0.036 |
| Cached input read Blank means not priced separately — not free | — |
| Cache write | — |
| Context window | 131,072 tokens |
| Max output | 32,768 tokens |
| Input modalities | text |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | 2024-06-30 |
| Listed | Aug 5, 2025 |
Also listed as openai/gpt-oss-20b:batch ($0.046 blended)— the same model at a different price or rate limit.
What gpt-oss-20b costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $11.52/mo |
| RAG assistant 8K in / 600 out × 100K requests | $19.80/mo |
| Coding agent 40K in / 4K out × 20K requests | $21.60/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $24.75/mo |
| Bulk classification 500 in / 20 out × 5M requests | $54.00/mo |
Compare gpt-oss-20b with
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gpt-oss-20b FAQ
How much does gpt-oss-20b cost?
gpt-oss-20b lists at $0.018 per 1M input tokens and $0.090 per 1M output tokens. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $19.80 at list price.
What is the context window of gpt-oss-20b?
gpt-oss-20b accepts up to 131,072 tokens of context and can return up to 32,768 output tokens per response.
Does gpt-oss-20b support tool calling?
Yes — gpt-oss-20b supports tool (function) calling and exposes extended reasoning. It accepts text input.
How does gpt-oss-20b score on benchmarks?
LiveBench has not published a run for gpt-oss-20b yet. Until it does, compare it on price and specs, or run your own evaluation on your own tasks.
What is the API model ID for gpt-oss-20b?
On OpenRouter the model ID is "openai/gpt-oss-20b". It was listed on Aug 5, 2025.
More from openai
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.