Bert-Nebulon Alpha

Image input Text input Text output Unavailable
Author's Description

This is a cloaked model provided to the community to gather feedback. A general-purpose multimodal model (text/image in, text out) designed for reliability, long-context comprehension, and adaptive logic. It is engineered for production-grade assistants, retrieval-augmented systems, science workloads, and complex agentic workflows. **Note:** All prompts and completions for this model are logged by the provider and may be used to improve the model.

Key Specifications
Cost
$
Context
256K
Released
Nov 24, 2025
Speed
Ability
Reliability
Supported Parameters

This model supports the following parameters:

Tools Max Tokens Structured Outputs Response Format Tool Choice
Features

This model supports the following features:

Response Format Tools Structured Outputs
Performance Summary

Bert-Nebulon Alpha, a general-purpose multimodal model from openrouter, demonstrates exceptional performance across several key metrics. It consistently ranks among the fastest models, achieving an Infinityth percentile speed across 8 benchmarks, indicating superior processing efficiency. While specific cost data is unavailable, suggesting potential free tier usage, its reliability is outstanding with a 100% success rate across all benchmarks, ensuring consistent and usable responses. The model exhibits perfect accuracy in General Knowledge, placing it among the top performers in both accuracy and speed for this category. It also shows strong capabilities in Mathematics (95.0% accuracy, 92nd percentile) and Email Classification (99.0% accuracy, 92nd percentile), highlighting its proficiency in structured tasks. Its performance in Coding (91.0% accuracy) and Reasoning (78.0% accuracy) is commendable. However, a notable weakness is its 0.0% accuracy in the Hallucinations benchmark, indicating it does not appropriately acknowledge uncertainty when presented with fictional concepts. This suggests a potential area for improvement in its ability to defer to "I don't know" responses.

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/bert-nebulon-alpha 256K $0 / 1M tokens $0 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration
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