OpenRouter Adds Free API Capacity for gpt-oss-20b and Gemma 4

OpenRouter

Jun 15, 2026

OpenRouter added free API capacity for OpenAI’s gpt-oss-20b and Google DeepMind’s Gemma 4 26B models, served by provider Darkbloom. Both models are now available at zero cost for input and output tokens through OpenRouter’s free-variant endpoints. This update provides cost-free access to these open-weight models for testing and production workloads.

Darkbloom
Browse models provided by Darkbloom (Terms of Service)
2 models
Tokens processed on OpenRouter
260K
195K
130K
65K
Jun 15
Google: Gemma 4 26B A4B
Gemma 4 26B A4B IT is an instruction-tuned Mixture-of-Experts (MoE) model from Google DeepMind. Despite 25.2B total parameters, only 3.8B activate per token during inference — delivering near-31B qualit...
by google | Apr 3, 2026 | 262K context | $0/M input tokens | $0/M output tokens
OpenAI: gpt-oss-20b
gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...
by openai | Aug 5, 2025 | 131K context | $0/M input tokens | $0/M output tokens — Darkbloom model usage metrics on OpenRouter, featuring Google Gemma 4 and OpenAI gpt-oss-20b model performance specifications.

View the full update on openrouter.ai

OpenRouter

@OpenRouter7h ago

New Free capacity on OpenRouter, served by @eigenlabs's Darkbloom: gpt-oss-20b and Gemma 4 26B Start using the models today ↓ https://t.co/rpYTvi4wD6

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