The Ultimate GitHub Copilot Model Guide (2026): Every Model Compared by Cost, Context, and SWE-bench Accuracy

Model Name Context Window SWE-bench (Verified) Multiplier Recommended Use Case Claude Haiku 4.5 160K 73.3% 0.33x Snappy, low-cost refactoring. Claude Opus 4.5 160K 80.9% 3x High-level architectur