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NovitaAI

ERNIE-4.5-21B-A3B-Thinking API

NovitaAI
About

Build advanced reasoning agents with ERNIE-4.5-21B-A3B-Thinking, 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 $0.28/1M output tokens, open weights architecture. Access ERNIE-4.5-21B-A3B-Thinking via the NovitaAI API with up to 66K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
No
Tool Use
No
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
131K

Tokens

Input Limit
131K

Tokens

Max Output
66K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.07
Output
$0.28
Frequently Asked Questions

ERNIE-4.5-21B-A3B-Thinking by NovitaAI costs $0.07 per 1M input tokens and $0.28 per 1M output tokens.

Model Details
ID
baidu/ernie-4.5-21B-a3b-thinking
Provider
NovitaAI
Family
ernie
Release Date
Sep 19, 2025
Knowledge Cutoff
Mar 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
NOVITA_API_KEY
API Base URL
https://api.novita.ai/openai
Documentation