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OpenAI: gpt-oss-20b

🇺🇸 OpenAI · gpt-oss-20b

Input Price $0.018 per million tokens NT$0.58
Output Price $0.090 per million tokens NT$2.9
Context Window 131K tokens Output limit: 33K
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Overview

OpenAI: gpt-oss-20b is a large language model API from OpenAI, part of its gpt-oss-20b model family. At $0.018 per million input tokens and $0.090 per million output tokens, it sits in the budget tier — among the cheaper options for high-throughput or cost-sensitive workloads. Output tokens cost about 5× as much as input, so prompt-heavy workloads run noticeably cheaper than generation-heavy ones. The 131K-token context window — around 197 pages of text — comfortably handles long documents, multi-file code, or extended conversations. On Artificial Analysis's Intelligence Index it scores 10 (F grade), a useful proxy for its general reasoning strength relative to the other models tracked here. All prices on this page reflect OpenRouter's routed rates and are re-synced automatically every day; confirm against the provider's official pricing before committing to production.

Dimension Unit Price (USD) Price (TWD) Effective From
Input per 1M tokens $0.018 NT$0.58
Output per 1M tokens $0.090 NT$2.9
Cached Input per 1M tokens $0.030 NT$0.96
Cached Input per 1M tokens $0.030 NT$0.96

Provider
OpenAI
Model Family
gpt-oss-20b
Version String
openai/gpt-oss-20b
Status
Active
Modality
Text
Context Window
131,072 tokens
Output Limit
32,768 tokens

Index Metrics

Cross-domain capability indexes evaluated by Artificial Analysis — Artificial Analysis

Intelligence Index 10 F Measured: 2026-09-08

Benchmark Scores

Data source: Artificial Analysis

AA-LCR 31.0% D Measured: 2026-09-08
GPQA Diamond 61.1% B Measured: 2026-09-08
HLE 5.3% D Measured: 2026-09-08
IFBench 57.8% C Measured: 2026-09-08
Non-Hallucination 13.3% Measured: 2026-09-08
Omniscience Accuracy 15.1% Measured: 2026-09-08
Tau2 50.3% Measured: 2026-09-08
TerminalBench 4.5% Measured: 2026-09-08

Performance Metrics

Real-world benchmarks, updated every 72 hours by Artificial Analysis — Artificial Analysis

First Token Latency 0.9s Measured: 2026-09-08
Output Speed 249 t/s Measured: 2026-09-08
Response Time 10.9s Measured: 2026-09-08

90-Day Price Trend

Input / Output price (USD per 1M tokens)

Past 90 days of records; every price change is shown here

Date Dimension Price (USD) Source
Output $0.090 OpenRouter
Input $0.018 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter
Cached Input $0.030 OpenRouter
Output $0.130 OpenRouter
Input $0.030 OpenRouter

Key Insights

Key data points from this page for quick reference and citation.

  • OpenAI: gpt-oss-20b Input price: $0.018/M tokens
  • OpenAI: gpt-oss-20b Output price: $0.09/M tokens
  • Context window: 131,072 tokens
  • Provider: OpenAI
  • Model family: gpt-oss-20b
  • Modalities: Text
  • Data source: OpenRouter, updated daily