Sonoma Sky Alpha

Image input Text input Text output
Author's Description

This is a cloaked model provided to the community to gather feedback. A maximally 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 Reasoning Tools Include Reasoning
Features

This model supports the following features:

Response Format Tools Reasoning Structured Outputs
Performance Summary

Sonoma Sky Alpha, a general-purpose frontier model from openrouter, demonstrates a strong overall performance profile during its testing period. While its speed ranking places it competitively at the 44th percentile, indicating solid response times, specific cost data is unavailable, suggesting it may be operating on a free tier. A standout feature is its exceptional reliability, achieving a 100% success rate across all benchmarks, meaning it consistently provides usable responses without technical failures. The model exhibits remarkable accuracy in several key areas. It achieved perfect 100% accuracy in Ethics, Reasoning, and General Knowledge benchmarks, often performing among the fastest models in these categories and demonstrating exceptional value in Reasoning. Its performance in Email Classification was also near-perfect at 99.0%, showcasing strong classification capabilities and leading in cost efficiency. Coding accuracy was high at 93.0%, placing it in the top tier for this skill. The primary area for improvement appears to be Instruction Following, where it achieved 72.4% accuracy, though still ranking well within the top 85th percentile. Overall, Sonoma Sky Alpha presents as a highly reliable and accurate model, particularly strong in knowledge, reasoning, and ethical understanding, with instruction following as a potential area for further refinement.

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-sky-alpha 2M $0 / 1M tokens $0 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Free Executions Accuracy Cost Duration
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