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Release · Pi · earendil-works

Pi v0.87.1

What's new in Pi v0.87.1, released Sep 22, 2026 (). Newer: v1.4.0 (Oct 21, 2026)

Official release notes ↗ Pi changelog

Release notes

Pi v0.87.1

New Features
  • Latest frontier models — Use Claude Opus 5.5, GPT-6 Sol, and GPT-6 Luna through supported providers, including GitHub Copilot. See Choose a Model.
  • Grok 4.7 by default for xAI — New xAI sessions now default to Grok 4.7. See Provider Authentication.
Added
  • Added inherited Claude Opus 5.5, GPT-6 Sol, and GPT-6 Luna support for GitHub Copilot.
  • Added inherited GPT-6 Sol and GPT-6 Luna support for OpenAI API keys and OpenAI Codex subscriptions.
  • Added inherited Claude Opus 5.5 support for Anthropic with adaptive thinking and a 1M context window.
Changed
  • Changed the default xAI model to Grok 4.7.
Fixed
  • Fixed split-turn compaction summaries being refused by Claude Fable 5.1 by clearly separating the conversation and using continuation-oriented instructions (#9908 by @davidbrai).
  • Fixed missing or invalid --mode values being silently ignored instead of reporting an error and exiting with a nonzero status (#9045).
  • Fixed inherited image-only user messages being rejected by some OpenAI-compatible providers because they included an empty text part (#9797).
  • Fixed inherited Anthropic OAuth requests reporting an outdated Claude Code version.