Ultramarine 1 Flash

Ultramarine 1 Flash

Paper Instruments
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About

Ultramarine 1 Flash is a hosted large language model offered through an API for developers and organizations building AI-assisted professional workflows. It is designed for knowledge-work tasks across areas such as finance, law, consulting, and operations, including research, analysis, and preparation of document-based deliverables. Applications can send prompts and receive streamed or standard responses, use reasoning controls and custom tool calls, and request structured output. The API accepts image inputs and supports OpenAI-compatible chat-completion and Responses formats, as well as Anthropic Messages-compatible requests. Developers can connect through the OpenAI or Anthropic SDKs, Claude Agent SDK, or Claude Code, and can use the model with Paper Instruments' Word, PowerPoint, and Excel libraries. Usage is billed by tokens against a prepaid balance.

About

Zerouter is a hosted AI API gateway for developers building applications and coding workflows with large language models. It provides one API key and a configurable base URL for sending requests to models from Anthropic (Claude), OpenAI (GPT), Google (Gemini), xAI (Grok), and Moonshot AI (Kimi). The gateway exposes OpenAI-compatible and Anthropic-compatible endpoints, allowing supported SDKs and clients such as Claude Code, Codex CLI, and Cursor to connect with a custom endpoint rather than managing separate provider connections. Users can select model IDs, view published per-token rates, and review request-level usage and charges. Zerouter uses pay-as-you-go billing based on input and output token use, with no subscription or monthly minimum. It is aimed at software developers and technical teams integrating hosted LLMs into apps, coding agents, and other API-based workflows.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and organizations building AI-enabled knowledge-work tools in finance, law, consulting, and operations.

Audience

Developers, AI engineers, startups and teams using Claude Code, Codex CLI, Cursor or LLM APIs

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$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.
Free Version Not Supported
Free Trial Not Supported

Pricing

$0.023/1M input tokens
Pay-as-you-go pricing varies by model and token type. The published rate table includes input pricing from $0.023 per million tokens and output pricing from $0.12 per million tokens. No subscription or monthly minimum is stated.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • 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.

Cons

  • 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.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Paper Instruments
Founded: 2025
United States
www.paperinstruments.com/ultramarine

Company Information

Zerouter
Founded: 2025
zerouter.ai

Alternatives

Alternatives

Categories

AI Models Supported

Categories

AI Gateways Supported

Integrations

Claude Code Supported
OpenAI Supported
Anthropic Not Supported
Claude Agent SDK Supported
Codex CLI Not Supported
Cursor Not Supported
Gemini Not Supported
Grok Not Supported
Kimi Not Supported
OpenAI Agents SDK Supported

Integrations

Claude Code Supported
OpenAI Supported
Anthropic Supported
Claude Agent SDK Not Supported
Codex CLI Supported
Cursor Supported
Gemini Supported
Grok Supported
Kimi Supported
OpenAI Agents SDK Not Supported
Claim Ultramarine 1 Flash and update features and information
Claim Ultramarine 1 Flash and update features and information
Claim Zerouter and update features and information
Claim Zerouter and update features and information