feat: switch translation model to gpt-5.4-nano

Author: duncanleo

packages/triage/README.md

@@ -44,7 +44,8 @@ Model dependency:
 
 - `extractClaimsFromNewEvidence` uses `gpt-5-mini`.
 - `triageNewEvidence` uses `gpt-5-mini`.
-- title/slug generation and translation use `gpt-5-nano`.
+- title/slug generation uses `gpt-5-nano`.
+- translation uses `gpt-5.4-nano`.
 
 Expected cost before running the checked-in eval set: less than USD 1 with the
 current short fixtures. Revisit this estimate in the same PR when adding or

packages/triage/src/llm/functions/translate/index.ts

@@ -7,9 +7,10 @@ import {
 import { assert } from '../../../util/assert.js';
 import { getOpenAiClient } from '../../client.js';
 import { toOpenAiJsonSchema } from '../../common/jsonSchema.js';
+import { TRANSLATE_MODEL } from './model.js';
 
 export async function translate(text: string) {
-  const model = 'gpt-5-nano';
+  const model = TRANSLATE_MODEL;
 
   const context: ResponseInputItem[] = [{ role: 'user', content: text }];
 

packages/triage/src/llm/functions/translate/model.ts

@@ -0,0 +1,2 @@
+export const TRANSLATE_MODEL = 'gpt-5.4-nano';
+export const TRANSLATE_MODEL_SOURCE = `@openai/${TRANSLATE_MODEL}`;

packages/triage/src/util/ingestContent/index.test.ts

@@ -132,6 +132,9 @@ describe('ingestContent', () => {
       title: {
         'en-SG': 'Downtown Line delay near Beauty World',
       },
+      titleMeta: {
+        source: '@openai/gpt-5.4-nano',
+      },
     });
     expect(bundle.evidence).toHaveLength(1);
     expect(bundle.evidence[0]).toMatchObject({
@@ -149,6 +152,9 @@ describe('ingestContent', () => {
         'Delay minutes: 15',
         'Report count: 4',
       ].join('\n\n'),
+      render: {
+        source: '@openai/gpt-5.4-nano',
+      },
     });
     expect(bundle.impactEvents).toEqual(
       expect.arrayContaining([

packages/triage/src/util/ingestContent/index.ts

@@ -12,6 +12,7 @@ import { computeImpactFromEvidenceClaims } from '../../helpers/computeImpactFrom
 import { extractClaimsFromNewEvidence } from '../../llm/functions/extractClaimsFromNewEvidence/index.js';
 import { generateIssueTitleAndSlug } from '../../llm/functions/generateIssueTitleAndSlug/index.js';
 import { translate } from '../../llm/functions/translate/index.js';
+import { TRANSLATE_MODEL_SOURCE } from '../../llm/functions/translate/model.js';
 import { triageNewEvidence } from '../../llm/functions/triageNewEvidence/index.js';
 import { assert } from '../assert.js';
 import { formatContentTextForIngest } from './helpers/formatContentTextForIngest.js';
@@ -167,7 +168,7 @@ export async function ingestContent(
         type: triageResult.result.issueType,
         title: translatedTitles,
         titleMeta: {
-          source: '@openai/gpt-5-nano',
+          source: TRANSLATE_MODEL_SOURCE,
         },
       };
 
@@ -206,7 +207,7 @@ export async function ingestContent(
     sourceUrl: evidenceProvenance.sourceUrl,
     render: {
       text: translatedEvidenceText,
-      source: '@openai/gpt-5-nano',
+      source: TRANSLATE_MODEL_SOURCE,
     },
   };