Modelpeers

Claude Opus 5 changelog

Every change to Claude Opus 5 that Modelpeers has recorded, newest first, each with the source it came from. The record starts Jul 24, 2026.

All (14)Releases (3)Retiring (1)Breaking changes (3)Quality (2)Benchmarks (5)

October 2026

GitHub Copilot characterClaude Opus 5 characterClaude Opus 4.8 character

Claude Opus 4.8, Opus 5 and GitHub Copilot

3 products from Anthropic and GitHub

Retiring

Copilot to remove Claude Opus 4.8, Claude Opus 5 and GPT-5.6 Terra on November 16

Copilot will deprecate Claude Opus 4.8 and Claude Opus 5 (replace with Claude Opus 5.5) and GPT-5.6 Terra (replace with GPT-6.1 Sol or GPT-6 Luna) on November 16, 2026. Opus 4.8 stays for individual annual-plan subscribers.

Takes effect Nov 16, 2026 · in 15 days

Who is affected:
Copilot users and integrations pinned to those models.
Action needed:
Move to the suggested alternatives before November 16, 2026.

8 incidents are listed on the Claude Opus 5 page. Get this changelog in a feed reader with the RSS feed.