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These entries record LaoZhang API announcements from September through December 2025, newest first. Prices and availability describe the state at the time; current models and prices are in the model and pricing catalog.

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December 2025

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December 11, 2025: GPT-5.2 launched

  • New models: gpt-5.2 and gpt-5.2-2025-12-11, with Instant, Thinking, and Pro modes.
  • Priced the same as OpenAI’s official prices at the time; actual charges followed the console price.

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November 2025

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November 24, 2025: Claude Opus 4.5 launched

  • New models: claude-opus-4-5-20251101 and claude-opus-4-5-20251101-thinking.
  • Supported the effort parameter for controlling response token usage, a thinking mode, and a 200K context window.
  • Priced the same as Anthropic’s official prices at the time, with usage-based billing.

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November 18, 2025: Gemini 3 series launched

  • New models: gemini-3-pro-preview, gemini-3-flash-preview, and gemini-3-pro-image-preview for image generation.
  • Supported thinking and non-thinking modes.
  • Priced the same as Google’s official prices at the time; actual charges followed the console price.

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November 13, 2025: GPT-5.1 series launched

  • New models: gpt-5.1 / gpt-5.1-2025-11-13 and the coding-focused gpt-5.1-codex series in High, Medium, and Mini tiers.

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October 2025

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October 15, 2025: Claude Haiku 4.5 launched

  • New models: claude-haiku-4-5-20251001 and claude-haiku-4-5-20251001-thinking.
  • Low-latency responses, a thinking mode, and a 200K context window, suited to high-volume tasks.

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September 2025

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September 29, 2025: Claude Sonnet 4.5 launched

  • New models: claude-sonnet-4-5-20250929 and claude-sonnet-4-5-20250929-thinking.
  • Aimed at coding, agents, and front-end development, with a thinking mode. The announcement recommended it as a backend model for coding tools such as Cursor and Cline.
Back to the 2025 archive index