# GPT-6.1 Sol released as new model for Codex and ChatGPT Work

> GPT-6.1 Sol delivers near-Astra performance for complex work at lower cost, designed for repeated long-running tasks across code, apps, and documents. Availability varies by plan, client, and workspace settings; access via model ID `gpt-6.1-sol`.

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