Agent Breaking Changes_

← Pi

Pi v0.99.1

2026-09-29 · official notes

Summary

• New Features
• GPT-6.1 Sol — Available on OpenAI, Azure OpenAI, and OpenAI Codex, and now the default OpenAI Codex model. See Select a model.
• Added GPT-6.1 Sol (gpt-6.1-sol) to the OpenAI, Azure OpenAI Responses, and OpenAI Codex providers.

Full notes

### New Features

- **GPT-6.1 Sol** — Available on OpenAI, Azure OpenAI, and OpenAI Codex, and now the default OpenAI Codex model. See [Select a model](https://github.com/earendil-works/pi/blob/v0.99.1/packages/coding-agent/docs/models.md#select-a-model).

### Added

- Added GPT-6.1 Sol (`gpt-6.1-sol`) to the OpenAI, Azure OpenAI Responses, and OpenAI Codex providers.

### Changed

- Changed the default OpenAI Codex model to GPT-6.1 Sol (`gpt-6.1-sol`).

### Fixed

- Fixed `/login` with OpenAI failing in the bundled release with a missing `openai-chatgpt.js` module error.