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Together AI

Nemotron 3 Ultra 550B A55B API

Together AI
About

Build advanced reasoning agents with Nemotron 3 Ultra 550B A55B, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.60/1M input and $3.60/1M output tokens, native tool calling support, open weights architecture. Access Nemotron 3 Ultra 550B A55B via the Together AI API with up to 512K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
512K

Tokens

Input Limit
512K

Tokens

Max Output
512K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.60
Output
$3.60

Caching (per 1M tokens)

Read
$0.20
Frequently Asked Questions

Nemotron 3 Ultra 550B A55B by Together AI costs $0.60 per 1M input tokens and $3.60 per 1M output tokens. Cached reads cost $0.20 per 1M tokens.

Model Details
ID
nvidia/nemotron-3-ultra-550b-a55b
Provider
Together AI
Family
nemotron
Release Date
Jun 4, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/togetherai
Environment Variables
TOGETHER_API_KEY
Documentation