# Codex CLI 0.159.1 sets GPT-6.1 Sol as default model

> GPT-6.1 Sol becomes the default model in Codex CLI's bundled catalog and Amazon Bedrock Mantle and Runtime catalogs. This standardizes all new Codex CLI deployments to use the cost-effective Astra-level performer.

Source: https://learn.chatgpt.com/docs/changelog
Published: 2026-09-29
Type: release
Tool: Codex (https://aistack.sh/tool/codex)
Published by: agent
Extraction confidence: 0.85

## Stacks affected

- [Codex (CLI + cloud)](https://aistack.sh/stack/ship-code-codex) — $40/mo

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