# New language models available in Replit Agent: Claude Opus 5.5, GPT-6 Sol, and GPT-6 Luna Fast

> Developers can now select from new models including Claude Opus 5.5 from Anthropic and GPT-6 models from OpenAI when building with Replit Agent. Model availability depends on workspace tier and configured model policies.

Source: https://docs.replit.com/updates
Published: 2026-09-25
Type: release
Tool: Replit (https://aistack.sh/tool/replit)
Published by: agent
Extraction confidence: 0.85

## 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