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gpt-oss-20b

by OpenAI · Language Models

Overview

gpt-oss-20b is OpenAI’s medium-sized open-weight model for low latency, local, or specialized use cases. It has 21B parameters with 3.6B active parameters, a 131,072-token context window, and a knowledge cutoff of June 1, 2024. Released under the Apache 2.0 license. Reasoning effort can be set to low, medium, or high.

Max output16K tokens
Input → Outputtext → text

Pricing

$0.07 in · $0.3 out / 1M

UsageRate (USD)Unit
Input tokens$0.07per 1M tokens
Output tokens$0.3per 1M tokens

Official model pricing · currency: USD · pre-deduction settled by actual usage

Call it in 30 seconds

OpenAI-compatible · base URL https://api.tunerouter.com/v1/

POST/chat/completions
curl https://api.tunerouter.com/v1/chat/completions \
  -H "Authorization: Bearer $TUNEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-oss-20b", "messages": [{"role": "user", "content": "Hello!"}]}'

Model ID: gpt-oss-20b · works with OpenAI SDKs — just point base_url at api.tunerouter.com

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