Sonoma Dusk Alpha

Image input Text input Text output
Author's Description

This is a cloaked model provided to the community to gather feedback. A fast and intelligent general-purpose frontier model with a 2 million token context window. Supports image inputs and parallel tool calling. Note: It’s free to use during this testing period, and prompts and completions are logged by the model creator for feedback and training.

Key Specifications
Cost
$
Context
2M
Released
Sep 05, 2025
Speed
Ability
Reliability
Supported Parameters

This model supports the following parameters:

Structured Outputs Response Format Tool Choice Max Tokens Tools
Features

This model supports the following features:

Response Format Tools Structured Outputs
Performance Summary

Sonoma Dusk Alpha, a frontier model from openrouter, demonstrates strong overall performance during its testing period. It consistently performs among the fastest models, ranking in the 73rd percentile for speed across six benchmarks. While no cost data is available due to its free testing phase, its "Top 3 in cost" accolades on several benchmarks suggest potential for competitive pricing. Reliability is a standout feature, with a perfect 100% success rate across all benchmarks, indicating exceptional stability and minimal technical failures. The model excels in specific areas. It achieves perfect accuracy in the Ethics benchmark and near-perfect scores in Email Classification (98.0%) and General Knowledge (98.5%), often being among the most accurate models for its speed. Its Coding performance is also robust, with 90.0% accuracy and high speed. However, Instruction Following (43.3% accuracy) and Reasoning (54.0% accuracy) show room for improvement, performing around the 42nd percentile. Despite these areas for development, Sonoma Dusk Alpha presents as a highly reliable, fast, and intelligent general-purpose model with significant strengths in knowledge-based and classification tasks.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $0
Completion $0

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Stealth
Stealth | openrouter/sonoma-dusk-alpha 2M $0 / 1M tokens $0 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Free Executions Accuracy Cost Duration
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