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Release notes in AI Router

2026

September

  • added 75 new models, including:

    • Claude Fable 5.1;
    • Claude Opus 5.5;
    • GPT-6 Astra, Luna, and Sol;
    • GPT-6.1 Sol;
    • Gemini 3.8 Flash;
    • Grok 4.7;
    • DeepSeek V4.1 Flash;
    • GLM 5.3 Prime;
    • Qwen3.8 Max Prime;
    • as well as image generation models — GPT Image 2.5, MAI-Image-2.6, and Recraft V4.1 Flash.

    You can view the current list of all models and prices on selectel.ru.

  • added support for the Anthropic Messages API. Requests can now be sent using the POST /v1/messages method, and the Base URL for the Anthropic SDK is https://api.selectel.ru/aig. Supported model names include claude-haiku-4-5, claude-sonnet-4-5, and others. Claude Code, Cline, and LangChain clients work out of the box;

  • enabled automatic prompt caching on Claude models — no additional configuration is required;

  • added request cost in the API response: the usage.cost field is returned in both the OpenAI-compatible protocol and the Anthropic Messages API;

  • added the Retry-After header in the response when the rate limit is reached. It shows how many seconds to wait before retrying the request;

  • improved 400 error messages: the response now specifies which request field is invalid;

  • added the reasoning_effort parameter with the value off — it disables reasoning token generation for models that support it;

  • set a limit on the request body size — 7.5 MiB;

  • added new metrics to the detailed consumption export in CSV format:

    • cached_input_tokens — the number of input tokens read from the cache;
    • cache_write_tokens — the number of tokens written to the cache;
    • reasoning_tokens — the number of tokens generated by the model during the reasoning stage.
August

  • added incoming request masking. If a request contains personal or other confidential data, the service replaces it with placeholders or rejects the request entirely. Masking is automatically applied to existing API methods. Connecting a separate endpoint or changing the request format is not required;

  • improved viewing AI Router consumption:

    • added the ability to view the monthly consumption of a specific API key;
    • expanded the per-request consumption export to CSV: you can now select a report period and group data by hours, days, months, models, and keys.

    Learn more in the View AI Router consumption instructions;

  • added the ability to manage limits in AI Router.

June