Pi v1.5.0

New Features

• Extension update changelogs: see what changed in installed extension packages on the next fresh launch after an update. Package authors can choose the changelog path, and collapseChangelog condenses the notices. See Show a changelog.
• Faster streaming: large tool calls are parsed incrementally, and code-heavy answers and tool rows reuse highlighting and rendered Markdown instead of repeating the work on every update. See Keep rendering responsive.
• Custom self-update commands: use PI_SELF_UPDATE_COMMAND or selfUpdateCommand to update pi through a wrapper or another package manager. See Custom update command.
• GPT-6.1 Terra: available through OpenAI, Azure OpenAI Responses, and OpenAI Codex, with tool search, mid-conversation thinking-level changes, and thinking off. Codex offers a 500K context window. See Models.

Breaking Changes

• Tool argument validation runs on @earendil-works/pi-schema. TypeBox features outside JSON Schema (Type.Refine(), Type.BigInt(), Type.Undefined(), codecs, Format.Set() formats) no longer apply to tool arguments; see Tool parameter schemas and TypeBox. Plain JSON Schema tools, including MCP tools, now get the same coercion as TypeBox tools, such as converting numeric strings and wrapping a single value into an array. Validation failures the model sees list pi-schema's messages (- path: missing, - limit: expected number, got string) instead of TypeBox's (must have required properties path, must be number).

Added

• Extension packages can now show their changelog after an update. Pi reads pi.changelogPath from the package's package.json, or CHANGELOG.md in the package root, and on the next fresh launch shows entries newer than the last seen version under "Extension Updates". The collapseChangelog setting condenses this to one line per package (#5958, #8790)
• pi.exec() accepts a maxBuffer option that limits stdout and stderr combined, and its result has a truncated field that is true when output exceeded the limit (#11360)
• Device-code login (for example GitHub Copilot) now opens the verification page and copies the code when you press Enter. Providers can turn either action off with openBrowserOnConfirm: false or copyCodeOnConfirm: false (#9282, #9301)
• pi update can update Pi through a wrapper or another package manager. Set PI_SELF_UPDATE_COMMAND (for example mise use -g npm:{packageName}@{version}) or the global selfUpdateCommand setting; pi update runs it when pi.dev reports a newer release and fills {packageName}, {version}, and {installSpec} from that release. See Custom update command (#7756, #5607)
• Extensions can format the user's configured keybindings with keyText() and keyHint() from the tool render context and the message and entry renderer options. Importing these functions from @earendil-works/pi-coding-agent can resolve the extension's own copy of the package, which does not see pi's keybindings, so hints such as keyHint("app.tools.expand", "to expand") rendered without the key. The docs now recommend the injected functions (#4748)
• Added persisted session-entry messageId and ISO timestamp to MarkdownTransformContext. They are available when rendering saved entries and undefined for live rendering (#7952 by @vipentti)
• Added a blocked option to inline ctx.ui.custom() components so approval prompts and other custom dialogs can report that pi is waiting for user input. Overlays ignore the option. See Custom screens and overlays (#11428)
• Added Usage.cost.totalFromProvider to distinguish billed totals from catalog estimates in SDK and extension usage data; combined usage is marked provider-reported only when every part is (#11178)
• Added concrete responseModel metadata to messages from pi-messages providers such as Radius, including when a virtual model is requested. See AssistantMessage (#11265)
• Added GPT-6.1 Terra for OpenAI, Azure OpenAI Responses, and OpenAI Codex, with tool search and mid-conversation thinking-level changes. It supports thinking off; Codex offers a 500K context window

Changed

• Extensions keep importing Type, Static and TSchema from @earendil-works/pi-ai: Pi maps that import to pi-ai's compat entry plus the TypeBox it bundles, now that pi-ai itself no longer re-exports TypeBox, and its StringEnum there stays a TypeBox TUnsafe<T>. The built-in tool factories (createReadTool() and the others) return TypeBoxAgentTool<typeof schema>, which keeps params typed for TypeBox.
• Tightened system prompt
• pi update for installs from the pi.dev installer no longer passes --min-release-age=0 to npm ci. The release lockfile pins every package, so the flag had no effect, and security scanners that block it stopped the update (#11262)
• /model and /scoped-models now show a model's name next to its ID when the name adds words the ID lacks, such as a renamed models.json override (#5916, #11347)
• MCP OAuth sign-in now uses pi's Client ID Metadata Document by default when the authorization server supports it for public clients, and registers a client dynamically otherwise, like Codex, Claude Code, and opencode. Clients registered before stay in use while their redirect URI matches. The new default oauth.clientRegistration: "auto" registers when clientName or a non-default callbackUrl is set; "dcr" always registers. pi mcp add --oauth-client-registration sets the mode (#11426)
• Changed the default OpenAI model from gpt-5.5 to gpt-6.1-sol, including after ChatGPT sign-in when no model is selected (#11442)
• Updated the built-in model catalog to models.dev v2. Realtime and image-only models are no longer offered as chat models; newer OpenAI and Google chat models are included

Fixed

• Updated glob matching to prevent denial of service from amplified glob patterns.

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