Ultramarine 1 Flash Description

Ultramarine 1 Flash is a powerful hosted large language model that developers and organizations can access via an API, specifically tailored for enhancing AI-driven professional workflows. It caters to various knowledge work sectors including finance, law, consulting, and operations, facilitating tasks such as research, detailed analysis, and the preparation of documentation. Users can submit prompts to the application and receive either streamed or standard responses, while also utilizing reasoning controls, custom tool calls, and the option to request structured outputs. The API is capable of processing image inputs and is compatible with both OpenAI's chat-completion formats and Anthropic Messages, ensuring versatile integration. Developers can interface with the model through several SDKs, including those from OpenAI and Anthropic, as well as the Claude Agent SDK and Claude Code, and can effectively employ it alongside Paper Instruments' suite of tools for Word, PowerPoint, and Excel. Additionally, the billing structure is based on token usage against a prepaid balance, allowing for flexible financial management of resources. This model represents a significant step forward in the automation of high-level professional tasks, pushing the boundaries of what AI can accomplish in workplace settings.

Pricing

Pricing Starts At:
$0.15/1M input tokens
Pricing Information:
Usage is prepaid and billed per token: input costs $0.15 per 1M tokens, cached input costs $0.03 per 1M tokens, and output, including reasoning, costs $0.50 per 1M tokens.

Integrations

API:
Yes, Ultramarine 1 Flash has an API

Reviews - 1 Verified Review

Total
ease
features

Company Details

Company:
Paper Instruments
Year Founded:
2025
Headquarters:
United States
Website:
www.paperinstruments.com/ultramarine

Media

Ultramarine 1 Flash Screenshot 1
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Product Details

Platforms
Web-Based
Types of Training
Training Docs

Ultramarine 1 Flash Features and Options

Ultramarine 1 Flash User Reviews

Write a Review
  • Name: Anonymous (Verified)
    Job Title: COO
    Length of product use: Less than 6 months
    Used How Often?: Daily
    Role: User, Deployment
    Organization Size: 26 - 99
    Features
    Ease
    Pricing
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Wow for knowledge work

    Date: Oct 14 2026

    Summary: Ultramarine 1 Flash is one of the more interesting models I have used for serious knowledge work. It is cheap enough to run heavily, strong enough to compete with much more expensive models, and clearly optimized for the kind of open-ended professional tasks that most benchmarks tend to ignore.

    Positive: It's so good at professional work that does not have one obvious “correct” answer. It is especially strong for things like research, financial analysis, diligence, writing, business operations, and turning messy information into a polished deliverable. The cost-performance ratio is probably the most impressive part. Paper Instruments reports an average cost of just $0.13 per task on its internal knowledge-work benchmark, while scoring 59.3 compared with 57.8 for Claude Fable 5 and 55.1 for GPT-5.6 Sol.

    Negative: The main downside is that coding is not really its biggest strength. Its Terminal-Bench and DeepSWE scores are competitive, but models like GPT-5.6 Sol, Gemini 3.8 Flash, and DeepSeek V4.1 Flash still score higher on those coding-focused benchmarks.

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