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GitHub Changelog: Copilot

10 items

GitHub's running log of Copilot changes, including quiet ones that never get an announcement.

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GitHub Copilot ships a local sandbox for agent commands and lets its CLI pick models from Ollama

On October 7, 2026, GitHub made local sandboxing for Copilot generally available in the Copilot CLI, the GitHub Copilot app, and VS Code sessions that use Agent Host, at no extra cost. The sandbox limits what a command Copilot runs can read, write, and reach on the network, and it is off until you or your organization turn it on. The same day the CLI gained a picker for models served by a local Ollama instance, and Claude Haiku 5.5 joined the model list for paid plans.

GitHub Changelogverified

The words Claude Haiku 5.5 in black serif type on an off-white background, between three torn paper fragments in yellow, beige, and blue, with a thin black arc running beneath the name.
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Claude Haiku 5.5 cuts Anthropic's small-model price by 90% for prompts under 100,000 tokens

Anthropic released Claude Haiku 5.5 on October 7, 2026. For prompts up to 100,000 tokens it costs $0.10 per million input tokens and $0.50 per million output tokens, a tenth of what Haiku 4.5 charges; above that line the prices are $0.50 and $2.50. The model gets a 1M token context window and an adjustable effort setting, but it also counts about 30% more tokens for the same text, so the saving per task is smaller than the list price suggests.

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GitHub's screenshot of the review effort level menu: Organization default (Balanced) is selected, followed by Lite, Balanced, and Max marked Coming soon.
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GitHub Copilot retires four models and makes Balanced its default code review effort

GitHub deprecated four models across all Copilot experiences on October 2, 2026: Gemini 3.5 Flash, Gemini 3.6 Flash, Kimi K2.7 Code, and Claude Opus 4.7. On the same day it made Copilot code review available through the REST and GraphQL APIs. Balanced is now the default review effort level, a change that took effect on September 28, 2026. According to GitHub's documentation, a Balanced review consumes more AI credits than a Lite one.

GitHub Changelogverified

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GitHub Copilot can now control desktop apps and run workflows defined in code

GitHub put two Copilot features into public preview on October 1, 2026. Computer use lets Copilot CLI and the GitHub Copilot app operate desktop applications on macOS and Windows, and it stays off until you turn it on. Dynamic workflows run a multi-agent process that is defined in code, and they are available on all Copilot plans. GitHub's documentation warns that computer use can pick the wrong control and that on-screen content can trigger unintended actions.

GitHub Changelogverified

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GitHub Copilot's HydraFusion, which can run two models on one request, reaches VS Code and the Copilot app

HydraFusion sits in the model picker but is not a model. It chooses one of three workflows per request and can hand a task to two models in a row, one drafting and one checking. GitHub moved the research preview from Copilot CLI to Visual Studio Code and the Copilot app on September 30, 2026, for Pro, Pro+, Business, and Enterprise plans. Billing follows the tokens each model consumes, so a request can cost more or less than a single-model one.

GitHub Changelogverified

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OpenAI ships GPT-6.1 Sol at GPT-6 Sol prices and adds a $500 Pro plan with Ultrafast

GPT-6.1 Sol costs $2 per million input tokens and $10 per million output tokens, the same as GPT-6 Sol, and its cached input drops to $0.10. OpenAI says the model comes close to GPT-6 Astra on coding and computer use at a fifth of Astra's price. The larger GPT-6.1 Astra did not ship. A new Pro 500 plan at $500 a month is the only Pro tier that includes Ultrafast, and Pro 200 returns with a smaller allowance.

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The GitHub Copilot app can now sandbox local sessions, but the setting is off by default

Since September 23, 2026, the GitHub Copilot app can limit what a local agent session reaches on your machine: folders, network access, and Git and GitHub CLI credentials. The feature is in public preview and has to be switched on for each project. A day earlier the app gained OpenTelemetry export for administrators, and Copilot code review settings reached every plan.

GitHub Changelogverified

Modelsstrong signal

Anthropic ships Claude Opus 5.5 and cuts token prices by a fifth

Opus 5.5 charges $4 per million input tokens and $20 per million output tokens, 20% below Opus 5. Cache reads, which dominate the bill for agentic and coding work, fall 60% to $0.20 per million. Anthropic says the model works at the level of Claude Fable 5.1 on most tasks while costing 40% less to run than Opus 5. It also arrives with safeguards that reroute most cybersecurity work to Opus 4.8.

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