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What is Ultramarine 1 Flash?

Ultramarine 1 Flash serves as a robust hosted large language model accessible to both developers and organizations through an API, designed specifically to enhance workflows driven by AI in professional environments. It supports a range of industries such as finance, law, consulting, and operations, aiding in activities like research, comprehensive analysis, and document preparation. Users can interact with the application by submitting prompts and can expect either streamed or standard responses, while also having access to reasoning controls, custom tool calls, and structured output options. The API additionally supports the processing of image inputs and is compatible with OpenAI's chat-completion formats as well as Anthropic Messages, promoting flexible integration across various platforms. Developers can connect with the model using multiple SDKs, including those from OpenAI and Anthropic, as well as the Claude Agent SDK and Claude Code, allowing for seamless collaboration with Paper Instruments' tools for Word, PowerPoint, and Excel. Furthermore, the billing system operates on a token-based model against a prepaid balance, providing users with flexible financial resource management. This model not only advances the automation of sophisticated professional tasks but also challenges the conventional limits of AI capabilities in workplace scenarios. As a result, it encourages organizations to rethink their approach to integrating AI technologies into their daily operations.

What is Claude Opus 4.8?

Claude Opus 4.8 is Anthropic’s latest frontier AI model engineered to deliver advanced coding intelligence, reasoning capabilities, autonomous workflows, and enterprise-grade collaboration for developers, technical teams, and organizations building AI-powered systems. As the successor to Claude Opus 4.7, the model introduces improvements across software engineering, agentic execution, practical knowledge work, benchmark performance, and alignment behavior while retaining the same standard pricing structure. Claude Opus 4.8 is specifically optimized for complex coding tasks, large-scale workflow orchestration, long-running automation processes, and advanced reasoning scenarios where reliability, transparency, and contextual judgment are critical. One of the model’s defining advancements is its improved honesty and uncertainty awareness, making it significantly less likely to produce unsupported conclusions or overlook defects in generated code, reasoning chains, and operational outputs. Anthropic’s alignment assessments also report stronger prosocial behavior, lower rates of deceptive or unsafe actions, and improved adherence to user intent compared to earlier Opus releases. The release introduces configurable effort controls that allow users to determine how much computational reasoning the model applies to a task, enabling flexible tradeoffs between speed, token consumption, and response depth depending on workflow complexity. Claude Opus 4.8 also powers new “dynamic workflows” functionality in Claude Code, where the model can coordinate hundreds of parallel AI subagents during a single session to execute large-scale software engineering operations such as repository-wide migrations, testing workflows, and multi-step automation tasks. Anthropic further expanded the platform with lower-cost fast mode processing, enabling the model to operate at significantly higher speeds while remaining more affordable than previous high-performance configurations.

Media

Media

Integrations Supported

Claude Agent SDK
Claude Code
OpenAI

Integrations Supported

Claude Agent SDK
Claude Code
Anything
BLACKBOX AI
Bash
Bind AI
Brokk
C#
Claude Max
Clawd.run
Gemini Enterprise Agent Platform
GitHub Copilot CLI
JetBrains Junie
Muses
Rider
RubyMine
Solidity
Vellum
Verdent

API Availability

Has API

API Availability

Has API

Pricing Information

$0.15/1M input tokens
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.

Pricing Information

$5 per 1M (input)
$5 per million input tokens and $25 per million output tokens. Pricing for fast mode is $10 per million input tokens and $50 per million output tokens.

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Not specified

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Paper Instruments

Date Founded

2025

Company Location

United States

Company Website

www.paperinstruments.com/ultramarine

Company Facts

Organization Name

Anthropic

Date Founded

2021

Company Location

United States

Company Website

claude.ai/

Categories and Features

AI Models

Not specified

Large Language Models

Not specified

Categories and Features

AI Coding Models

Not specified

AI Models

Not specified

AI Reasoning Models

Not specified

AI Vision Models

Not specified

Foundation Models

Not specified

Large Language Models

Not specified

Multimodal Models

Not specified

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