fix: remove outdated Haiku filter for GitHub Copilot #6593
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…ction Claude Haiku 4.5 now has a 0.33x multiplier in GitHub Copilot, the same as other models in the small model priority list (Gemini 3 Flash, GPT-5.1-Codex-Mini). The filter was added when Haiku was considered premium, but this is no longer the case. Removing this filter allows Haiku 4.5 to be properly selected as a small model for cost-effective operations like session title generation. Fixes session title generation failures for GitHub Copilot users where titles remained as "New session - <date>" instead of being auto-generated.
thdxr
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Jan 1, 2026
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Summary
Removes the GitHub Copilot filter that excluded Claude Haiku 4.5 from small model selection.
Problem
Session titles weren't being auto-generated for GitHub Copilot users - they stayed as "New session - 2026-01-01..." instead of getting meaningful names.
The issue: Haiku 4.5 was filtered out based on outdated assumptions. When the filter was added in Oct 2025, Haiku was considered a premium model. Now it has a 0.33x multiplier, same as other small models in the priority list (Gemini 3 Flash, GPT-5.1-Codex-Mini - Pricing page).
Solution
Remove the filter. Haiku 4.5 is now cost-effective and should be available for title generation.
Changes
provider.tsthat filtered outclaude-haiku-4.5for GitHub CopilotFixes #4040