Skip to main content
2026/8/14 13:47 (UTC+8) · Service Notice · OpenAI 🗂️ OpenAI has retired the gpt-5.x-chat-latest family — calls return 404 model_not_found OpenAI has deprecated the versioned chat-latest models — gpt-5.1-chat-latest, gpt-5.2-chat-latest, gpt-5.3-chat-latest — and calling the official API returns HTTP 404 with The model gpt-5.3-chat-latest has been deprecated, type invalid_request_error and code model_not_found. This is an upstream retirement, not a fault on our routing, so neither retrying nor switching groups will bring it back — migration means changing the model field. The GPT-5.6 family covers the same conversational workloads and stays callable, all three tiers at 1M context (pick whichever fits):
  • gpt-5.6-terra: $2 / $12 per 1M tokens, GPT-5.5-level performance at half the price
  • gpt-5.6-sol: $5 / $30 per 1M tokens, the flagship tier, and what the gpt-5.6 alias points to
  • gpt-5.6-luna: $0.2 / $1.2 per 1M tokens, the lightweight tier for high concurrency and cost-sensitive workloads
Migration is a model name swap with every other parameter unchanged; see the model pricing page for live prices and available groups.
← Back to Live Updates · 📚 Monthly archive