Models & Labs
Claude Opus 5.5 arrives in GitHub Copilot
GitHub Changeloghigh confidence
Why it matters
- →Opus 5.5 offers improved token efficiency in agentic coding tasks compared to its predecessor.
- →Enterprise admins can now control access via model policies within Copilot settings.
- →The model is available across all major IDEs including VS Code, JetBrains, and Xcode.
GitHub has added Anthropic's Claude Opus 5.5 to its Copilot platform, available to Pro+, Max, Business, and Enterprise subscribers. The update brings a new model tier that reportedly resolves tasks with fewer steps and tokens compared to the previous Opus version, while maintaining error recovery capabilities in agentic coding scenarios. Access is managed through existing model policies, with automatic enablement for new plans unless disabled by administrators. The feature is rolling out gradually across Visual Studio Code, JetBrains IDEs, Xcode, and other supported environments.
Read originalThe story around this
Earlier coverage that leads up to this article, and what followed. Lines connect each piece to the closest one after it, converging here.
How we got here
- 1Anthropic Releases Claude Opus 4.8
Anthropic · May 28, 2026 · Same story
- 2Claude Opus 4.8 now in GitHub Copilot
GitHub Changelog · May 28, 2026 · Same story
- 3Anthropic Releases Opus 4.8 Update
Matthew Berman · May 29, 2026 · Related
- 4Anthropic releases Claude Opus 4.8
AI News · May 29, 2026 · Same story
- 5Anthropic Launches Claude Opus 5 Model
Anthropic · July 24, 2026 · Same story
- 6Claude Opus 5 Now in GitHub Copilot
GitHub Changelog · July 24, 2026 · Same story
- 7Anthropic Launches Opus 5 Model
TechCrunch AI · July 24, 2026 · Same story
- 8Anthropic's Opus 5 Release Raises Concerns for Indie Hackers
Fireship · July 29, 2026 · Same story
What happened next
- 9Claude Code v2.1.280 adds Opus 5.5 and fixes agent stability
Claude Code Releases · September 22, 2026 · Related
- 10Anthropic Sonnet 5.5 narrows gap with Opus at half price
The Rundown AI · September 29, 2026 · Related
- 11Claude Code v2.1.284 adds Sonnet 5.5
Claude Code Releases · September 30, 2026 · Related
- 12Anthropic ships Claude 3.5 updates and new apps
Duncan Rogoff · October 21, 2026 · Related
Follow this story
Open the full story →Anthropic releases Claude Opus 5.5 with tighter security
10 developments
- Sep 22 · The Verge AI
Anthropic releases Claude Opus 5.5 with tighter security - Sep 22 · TechCrunch AI
Anthropic releases Opus 5.5 with lower prices↳ Opus 5.5 lowers output costs to $20 per million tokens while maintaining performance that beats the larger Fable model in coding and knowled - Sep 22 · GitHub Changelog
Claude Opus 5.5 arrives in GitHub Copilot (This article)↳ Claude Opus 5.5 is now available in GitHub Copilot for enterprise developers. - Sep 23 · Matthew Berman
Anthropic releases Opus 5.5 - Sep 23 · Duncan Rogoff
Anthropic releases official Claude Code playbook for Opus 5.5↳ Anthropic released an official guide optimizing Claude Code with Opus 5.5 to reduce latency and cost through specific prompting habits. - Sep 24 · AI Explained
Anthropic Releases Claude Opus 5.5 Model - Sep 25 · Lev Selector
Claude Opus 5.5 and GPT-6 Sol Released↳ OpenAI launches GPT-6 Sol and Luna variants alongside Anthropic's release. - Sep 26 · Matt Wolfe
Anthropic Releases Claude Opus 5.5 - Sep 30 · Matt Wolfe
Anthropic Releases Opus 5.5 Coding Model - Oct 2 · Lev Selector
Anthropic Launches Claude Sonnet 5.5 and Opus 5.5
More from GitHub Changelog
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GitHub Copilot Code Review API and UI updates
GitHub is finally exposing Copilot code review configuration to the REST and GraphQL APIs, closing a major gap for enterprise automation. Administrators can now programmatically control review effort, enablement, and custom instructions across organizations and repositories, moving beyond manual web interface tweaks. The update also refines the user experience with compact overviews, explicit attribution of AI sources like MCP servers, and better handling of bot-authored PRs. This shift makes Copilot Review a first-class citizen in CI/CD pipelines rather than just a UI feature.
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GitHub Copilot Dashboard Adds Chat and Agent Metrics
GitHub finally stops treating chat as a passive afterthought in its enterprise analytics. By adding Copilot Chat and the VS Code Agents window to the impact dashboard, the platform now tracks nine distinct experiences instead of just seven. The rebranding of 'Passive users' to 'Chat-first users' is a semantic correction that aligns metrics with actual developer behavior rather than arbitrary adoption thresholds. This gives engineering leaders a complete picture of how AI is actually being used across their codebases, closing the visibility gap between typing commands and writing code.
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Copilot expands to JetBrains Air and Xcode
GitHub Copilot is aggressively expanding its footprint beyond VS Code, landing in JetBrains Air and Xcode’s native assistant. This move signals a shift from IDE-specific plugins to a broader platform strategy, allowing developers to use their existing subscription across major ecosystems. The release also refines agent workflows with direct PR merging and remote preview capabilities, reducing context-switching for complex tasks. While the core AI engine remains unchanged, the integration depth in Xcode and JetBrains marks a significant step toward universal coding assistance.
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