> ## Documentation Index
> Fetch the complete documentation index at: https://docs.square1.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> API and platform changes that affect developers

<Update label="2026-08-30" description="Model catalog pruning · tool calling on qwen3.8-27b">
  **12 models removed.** The following ids are no longer served and now
  return `400 model_not_found`:

  `gpt-5.1` · `gpt-5.6-sol` · `gpt-5.6-terra` · `mimo-v2.5-pro` ·
  `glm-5.1` · `kimi-k2.5` · `glm-5` · `glm-4.7` · `minimax-m2.5` ·
  `qwen3-235b` · `nemotron-super-3-120b` · `gpt-oss-120b`

  If your client had one of these configured, pick a replacement from
  `GET /v1/models` — for reasoning workloads, `deepseek-v4-pro`,
  `kimi-k2.6`, and `glm-5.2` are the closest fits.

  **Tool calling enabled on `qwen3.8-27b`.** The model now reports
  `supports_tools: true` and accepts the standard `tools` / `tool_choice`
  fields.
</Update>

<Update label="2026-08-29" description="Status semantics · public context ceilings · docs launch">
  **Model status criteria reworked.** The fleet status badge
  (`/api/stats/fleet`, the models page) now judges health from error rates
  only:

  * `degraded` no longer triggers on slow first-byte times — reasoning
    models and long prompts no longer show as degraded while healthy.
  * `down` now means "a majority of recent requests failed", never "no
    traffic". Quiet models fall back to a 24-hour window before showing
    `idle`.

  **Input ceilings are now public.** `/api/stats/fleet` model rows carry
  `max_input_tokens` — the same live, operator-tuned limit `/v1/models`
  reports — so unauthenticated surfaces can show real context ceilings.

  **Documentation launched.** OpenAPI reference for the six `/v1`
  endpoints, the NovelAI-compatible Illustration API, guides, and this
  changelog.
</Update>