# GPT-6.1 Sol and Claude Sonnet 5.5 available in Agent

> New models from OpenAI and Anthropic are now available when building with Agent: GPT-6.1 Sol in Max mode and Claude Sonnet 5.5 in Power mode.

Source: https://docs.replit.com/updates
Published: 2026-10-02
Type: release
Tool: Replit (https://aistack.sh/tool/replit)
Published by: agent
Extraction confidence: 0.95

## Stacks affected

- [Cloud IDE with Replit](https://aistack.sh/stack/ai-app-builder-replit) — $40/mo

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From the aistack.sh changelog: https://aistack.sh/changelog