Editing Openai/691a14bb-ac48-8008-85d0-2e4fb3f780d1 (section)

===== Model map by plan phase =====

| Phase / Step                                                                                                                                       | Primary model            | Why                                                                        | Assist models                                                                                                                                                       |
| ------------------------------------------------------------------------------------------------------------------------ | ------------------------ | -------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ |
| Phase 1 — Chat foundation: integrate ChatKit UI → /chat calling Responses API, register tools, pass tenant metadata. 

HOSTED_ASSISTANT_VOICE_PLAN | GPT-5 High Reasoning     | Lays the scaffold, enforces request/response shapes, and threads metadata. | SWE-1.5 for structured repo diffs and clean commits; Claude Sonnet 4.5 for clear config and SDK docs text; Kimi K2 if you need to load many existing files at once. |
| Ingestion pipeline: uploads → normalize/OCR → chunk → embed → vector_store.create; map tenant→store. 

HOSTED_ASSISTANT_VOICE_PLAN                 | GPT-5 Medium Reasoning   | Balanced throughput for boilerplate services and workers.                  | Qwen3-Coder Fast to generate batch jobs, schemas, and retries quickly.                                                                                              |
| Phase 2 — Tool layer: sql_read, doc_summarize, compare_docs, with tenant validation and logging. 

HOSTED_ASSISTANT_VOICE_PLAN                     | o3 High Reasoning        | Precise contract/spec authoring and invariant checks on params and auth.   | Gemini 2.5 Pro to wire HTTP/JSON, error mapping, and idempotency; SWE-1.5 to group function files and tests into coherent commits.                                  |
| Architecture flow glue: ChatKit ↔ Responses API with tools and vector store. 

HOSTED_ASSISTANT_VOICE_PLAN                                         | Claude Opus 4.1 Thinking | Strong at cross-component causality and failure paths.                     | GPT-5 High as alternate if latency is acceptable.                                                                                                                   |
| Phase 3 — STT: Realtime API WebSocket streaming; capture mic frames and forward text to /chat. 

HOSTED_ASSISTANT_VOICE_PLAN                       | Gemini 2.5 Pro           | Good at evented streaming handlers and WebSocket state.                    | Grok Code Fast to draft front-end audio workers and frame queues.                                                                                                   |
| Phase 3 — TTS: audio/speech with gpt-4o-mini-tts or tts-1, return signed URL/base64; cache by (message_id, voice). 

HOSTED_ASSISTANT_VOICE_PLAN   | Claude Sonnet 4.5        | Clear server/controller code and response caching logic.                   | GPT-5 Medium to finalize SDK calls and response types.                                                                                                              |
| Phase 4 — UI voice controls: Hold-to-Speak, Speak Response, settings toggle. 

HOSTED_ASSISTANT_VOICE_PLAN                                         | Grok Code Fast           | Fast JS/TS components and event wiring.                                    | Haiku 4.5 for small, rapid UI edits.                                                                                                                                |
| Phase 5 — Observability & security: per-tenant isolation, signed URLs, cost tracking. 

HOSTED_ASSISTANT_VOICE_PLAN                                | SWE-1.5                  | Commit hygiene, logging hooks, and policy checks across files.             | o3 High to write assertions and guardrails; Qwen3-Coder Fast to generate probes and tests.                                                                          |
| Deliverables sweep: /chat, /ingest, /tts, /stt, ChatKit UI, tenant-aware File Search, logging/caching/costs. 

HOSTED_ASSISTANT_VOICE_PLAN         | Kimi K2                  | Load many files and tickets at once for the final integration pass.        | SWE-1.5 to batch and label commits coherently.                                                                                                                      |