diff --git a/kipina-codebench/benchmark.mjs b/kipina-codebench/benchmark.mjs
index 297e072..5c9cd58 100644
--- a/kipina-codebench/benchmark.mjs
+++ b/kipina-codebench/benchmark.mjs
@@ -35,6 +35,7 @@ const RESULTS_DIR = join(__dirname, 'results');
 const THINK_MODE = args.includes('--think');
 const COMPACT_MODE = args.includes('--compact');
 const NO_ORCHESTRATE = args.includes('--no-orchestrate');
+const SPEC_MODEL = arg('spec-model', '');  // Eri malli spec-vaiheille (1-2)
 const LANG = arg('lang', 'python');  // python | rust | go
 const ROUNDS = parseInt(arg('rounds', '1'));  // 1-10 toistoa
 const MAX_FIX_ROUNDS = 2;
@@ -328,8 +329,9 @@ async function runPipeline(model, scenario, round = 1) {
 
     try {
         // 1. Vaatimukset
-        console.log(`    [1/5] Vaatimukset...`);
-        const req = await ollamaChat(model, scenario.prompt, CLIENT_SYSTEM, 2048);
+        const specModel = SPEC_MODEL || model;
+        console.log(`    [1/5] Vaatimukset${SPEC_MODEL ? ` (${SPEC_MODEL})` : ''}...`);
+        const req = await ollamaChat(specModel, scenario.prompt, CLIENT_SYSTEM, 2048);
         timings.push(req);
         if (!req.text || req.text.length < 50) { result.error = 'Vaatimukset liian lyhyet'; return result; }
         result.reqOk = true;
@@ -337,7 +339,7 @@ async function runPipeline(model, scenario, round = 1) {
 
         // 2. JSON-speksi
         console.log(`    [2/5] JSON-speksi...`);
-        const specResp = await ollamaChat(model, `${req.text}\n\nOutput a JSON spec for this project.`, SPEC_SYSTEM, 4096);
+        const specResp = await ollamaChat(specModel, `${req.text}\n\nOutput a JSON spec for this project.`, SPEC_SYSTEM, 4096);
         timings.push(specResp);
         const spec = extractJson(specResp.text);
         if (!spec || !spec.entities || spec.entities.length === 0) { result.error = 'JSON-speksi epäonnistui'; writeFileSync(`${dir}/_spec_raw.txt`, specResp.text); return result; }