From 45812420f5d0a3bc53e8c8ffd1984c8bb4e9441c Mon Sep 17 00:00:00 2001
From: Peter Foster <peter@foster.net>
Date: Thu, 22 Jan 2026 19:58:16 +0000
Subject: [PATCH] perf: Switch CV parsing and company matching to Claude Haiku
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- CVParserService: Sonnet 4 → Haiku (MaxTokens 4096 → 2048)
- AICompanyNameMatcherService: Sonnet 4 → Haiku (MaxTokens 1024 → 512)
- Estimated cost savings: ~60% per CV check
- Haiku handles structured extraction and semantic matching effectively

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 .../Services/AICompanyNameMatcherService.cs                   | 4 ++--
 src/RealCV.Infrastructure/Services/CVParserService.cs         | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/RealCV.Infrastructure/Services/AICompanyNameMatcherService.cs b/src/RealCV.Infrastructure/Services/AICompanyNameMatcherService.cs
index 3ce515b..624dd9a 100644
--- a/src/RealCV.Infrastructure/Services/AICompanyNameMatcherService.cs
+++ b/src/RealCV.Infrastructure/Services/AICompanyNameMatcherService.cs
@@ -128,8 +128,8 @@ public sealed class AICompanyNameMatcherService : ICompanyNameMatcherService
 
             var parameters = new MessageParameters
             {
-                Model = "claude-sonnet-4-20250514",
-                MaxTokens = 1024,
+                Model = "claude-3-5-haiku-20241022",
+                MaxTokens = 512,
                 Messages = messages,
                 System = [new SystemMessage(SystemPrompt)]
             };
diff --git a/src/RealCV.Infrastructure/Services/CVParserService.cs b/src/RealCV.Infrastructure/Services/CVParserService.cs
index ccd3867..d30f259 100644
--- a/src/RealCV.Infrastructure/Services/CVParserService.cs
+++ b/src/RealCV.Infrastructure/Services/CVParserService.cs
@@ -171,8 +171,8 @@ public sealed class CVParserService : ICVParserService
 
         var parameters = new MessageParameters
         {
-            Model = "claude-sonnet-4-20250514",
-            MaxTokens = 4096,
+            Model = "claude-3-5-haiku-20241022",
+            MaxTokens = 2048,
             Messages = messages,
             System = [new SystemMessage(SystemPrompt)]
         };