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IDE plugins: v2.9.1: Claude Sonnet 4.5 & 4.5 Thinking is now available.

Product: IDE plugins (Next channel)

Claude Sonnet 4.5 & 4.5 Thinking is now available.

What changed

  • Claude Sonnet 4.5 & 4.5 Thinking is now available.
  • Claude 4.5 will be 1x prompt credits and 4.5 Thinking will be 1.5x prompt credits.
  • GPT-5-Codex is now available for free (0x credits) for a limited time for paid users.
  • Free users can use GPT-5-Codex as well for 0.5x credits.
  • Grok Code Fast 1 is available for Pro and Teams users.
  • Users can now add follow-up messages to Cascade while it is working, and Cascade will process them in order after the current task is complete.
  • Cascade now renders mermaid diagrams in the conversation.
  • Fixed multi line autocomplete regression for some users.

Source

Why it matters

If you use IDE plugins, skim the official notes above and decide what to try in your next session. Tag the right surface — Cloud vs Desktop vs CLI — before you change workflows.

Fan coverage from Devin Central — not an official Cognition announcement. Devin is a trademark of Cognition.