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OpenCode Zen

Nemotron 3.5 Lightning Free API

OpenCode Zen
About

Build advanced reasoning agents with Nemotron 3.5 Lightning Free, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support, open weights architecture. Access Nemotron 3.5 Lightning Free via the OpenCode Zen API with up to 262K 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
262K

Tokens

Input Limit
262K

Tokens

Max Output
262K

Tokens

Pricing

Standard (per 1M tokens)

Input
Free
Output
Free

Caching (per 1M tokens)

Read
Free
Frequently Asked Questions

Nemotron 3.5 Lightning Free by OpenCode Zen costs Free per 1M input tokens and Free per 1M output tokens. Cached reads cost Free per 1M tokens.

Model Details
ID
nemotron-3.5-lightning-free
Provider
OpenCode Zen
Family
nemotron-free
Release Date
Aug 11, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
OPENCODE_API_KEY
API Base URL
https://opencode.ai/zen/v1
Documentation