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Amazon Bedrock

gpt-oss-20b API

Amazon Bedrock
About

Build advanced reasoning agents with gpt-oss-20b, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.07/1M input and $0.30/1M output tokens, native tool calling support. Access gpt-oss-20b via the Amazon Bedrock API with up to 16K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
128K

Tokens

Input Limit
128K

Tokens

Max Output
16K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.07
Output
$0.30
Frequently Asked Questions

gpt-oss-20b by Amazon Bedrock costs $0.07 per 1M input tokens and $0.30 per 1M output tokens.

Model Details
ID
openai.gpt-oss-20b-1:0
Provider
Amazon Bedrock
Family
gpt-oss
Release Date
Aug 5, 2025
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/amazon-bedrock
Environment Variables
AWS_ACCESS_KEY_ID
AWS_SECRET_ACCESS_KEY
AWS_REGION
AWS_BEARER_TOKEN_BEDROCK
Documentation