Claude Sonnet 4.5
Claude Sonnet 4.5 (Anthropic, 2025) is an image-generation model. Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
by Anthropic · 1000K token context window
Best for
- image generation from text
- creative design and ideation
Ways to use Claude Sonnet 4.5 in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your Anthropic API key. osFoundry discovers Claude Sonnet 4.5 automatically — assign it to a Maestro role (router, direct, orchestrator, or fallback) in the Pipeline tab and it is live in every chat. Your key, your provider account — no token markup.
Use it in a Room App
Room Apps declare AI features in their manifest, then call them with invokeAI:
import { invokeAI } from '@osfoundry/app-sdk'
// 'summarize' is an AI feature declared in your app manifest.
const result = await invokeAI('summarize', userText)
Call it from your own apps
Once a model is wired into your workspace you can host it as an API and reach it from your own services, scripts, or CI — outside osFoundry.
Claude Sonnet 4.5 vs similar models
Licence
Hosted — usage subject to provider terms — Hosted-only model — usage governed by the provider's API terms. Bring your own provider key.
No weights distributed; usage subject to provider terms.
Frequently asked about Claude Sonnet 4.5
How much does Claude Sonnet 4.5 cost?
Claude Sonnet 4.5 is metered at $ 3.00 /1M for input, and $ 15.00 /1M for output. Bring your own Anthropic API key — osFoundry passes through provider pricing without markup.
Can I use Claude Sonnet 4.5 commercially?
Commercial use is allowed with conditions. Hosted-only model — usage governed by the provider's API terms. Bring your own provider key. No weights distributed; usage subject to provider terms.
What is the context window of Claude Sonnet 4.5?
Claude Sonnet 4.5 supports a 1000K token context window.
Can I run Claude Sonnet 4.5 locally?
No — Claude Sonnet 4.5 is hosted only and accessed via the Anthropic API.
What is Claude Sonnet 4.5 best at?
Claude Sonnet 4.5 is well-suited to image generation from text, creative design and ideation.
How do I use Claude Sonnet 4.5 in osFoundry?
Paste your Anthropic API key in the key dialog (or deploy the open weights for self-hostable models), assign Claude Sonnet 4.5 to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by Anthropic on September 29, 2025. Source: https://openrouter.ai/anthropic/claude-sonnet-4.5