Discrepancies on context sizes using Opencode/Copilot CLI

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Hi,

I'm using Opencode to connect to my github copilot subscription provided by my company. But it seems the context size seen by Opencode for a specific model is not the same than the one provided by copilot. For example , if i'm using Sonnet 4.6 on Copilot CLI, i can see a context size of 200K. With Opencode , we cannot see directly the full contexte size (it could be interesting to have it displayed directly) . but from the percent displayed the context size is 12K tokens . It seems to be the same for a lot of models.

This issue might be a duplicate of existing issues. Please check:

Copilot CLI has higher context window than GitHub Copilot extension #16861: Same issue — OpenCode shows lower context window sizes for GitHub Copilot models (e.g. claude-sonnet-4.6 shows 128K in OpenCode vs 200K from the Copilot CLI), which appears to be caused by OpenCode using static model metadata instead of live Copilot model metadata.
What is the specific context size of Github Copilot, is it only 128K? #16129: Related question about GitHub Copilot context sizes in OpenCode.

we sync from models api now

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Discrepancies on context sizes using Opencode/Copilot CLI #17582

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Discrepancies on context sizes using Opencode/Copilot CLI #17582

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github-actions commented on Mar 15, 2026

rekram1-node commented on May 13, 2026

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