references/latest-model.md
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Source excerpt starting at line 1.# Latest model fallback This is a compact, non-authoritative fallback, not a source for current availability, prices, aliases, or defaults. First search for and fetch current official model guidance at `https://developers.openai.com/api/docs/guides/latest-model` and the relevant official model page. The fetched official documentation wins if this snapshot has drifted. Disclose any use of this fallback. ## Model roles | Model ID | Documented workload to verify against the current model page || --- | --- || `gpt-6` | GPT-6 family alias; verify its currently documented routing and availability. || `gpt-6-astra` | Quality-first flagship, reasoning, and difficult coding work. || `gpt-5.6-terra` | Balanced quality, latency, and cost. || `gpt-5.6-luna` | Primary choice for faster or cheaper workloads. | Use `https://developers.openai.com/api/docs/guides/latest-model/gpt-6-astra.md#migration-quickstart` for an actual GPT-6 migration and `https://developers.openai.com/api/docs/guides/latest-model/gpt-6-astra.md#prompting-best-practices` for requested GPT-6 prompting. Open and read the relevant page before recommending a request shape, reasoning setting, endpoint, tool behavior, or migration. ## Explicitly requested existing models | Model ID | Boundary || --- | --- || `gpt-4.1` | Preserve only when the user explicitly requests this model or existing migration target; search and fetch its own current official guide. || `gpt-5.4` | Preserve only when the user explicitly requests this model or existing migration target; search and fetch its own current official guide. | Do not promote a legacy model as the current default, substitute it into an unrelated task, or replace an explicitly requested legacy target with GPT-6 Astra. Recommend a specialized image, audio, realtime, coding, moderation, or embedding model only after verifying the requested modality against current official documentation. Verify GPT-6 Pro against current official Responses and model documentation before describing model IDs, reasoning modes, request parameters, or account availability; do not invent a separate `gpt-6-pro` model slug.