models: free model muse-spark-1.3-contributor-free removed from catalog without notice #56541

Summary

The free model opencode/muse-spark-1.3-contributor-free ("Muse Spark 1.3 Free", family muse-free) was available and working on v1.18.32–1.18.35, but is absent from the catalog on v2.0.32 and can no longer be selected or invoked. There is no error, changelog entry, or in-app notice explaining the removal, so users cannot tell whether it was retired intentionally, is temporarily unavailable, or is a regression in catalog loading.

Environment

• opencode version: 2.0.32
• OS: Microsoft Windows [Version 10.0.19045.7807] (win32 x64)
• Terminal: Unavailable: TERM_PROGRAM, COLORTERM, and WT_SESSION are unset; TERM=xterm-256color
• Shell: C:\Windows\system32\cmd.exe (ComSpec)
• Install/channel: release, installed via npm (@opencode/cli@2.0.32 global)
• Active plugins: none configured in ~/.config/opencode/opencode.jsonc; @opencode-ai/plugin@1.18.25 is present as a dependency only

Reproduction

1. On opencode v1.18.32–v1.18.35, select model opencode/muse-spark-1.3-contributor-free (variant high) and send a message. It responds normally at cost: 0.

2. Update opencode to v2.0.32.

3. Run:

   opencode run --model opencode/muse-spark-1.3-contributor-free#high "Reply with exactly: ok"

4. Observe the model is missing from the model picker and the invocation fails.

Expected Behavior

Either the model remains listed (for example as deprecated, possibly still routable during a deprecation window), or its removal comes with an explicit notice — a changelog entry, release note, or in-app message naming muse-spark-1.3-contributor-free and stating whether it is retired permanently or coming back.

A clear error such as "this model has been retired, use X instead" would also be acceptable.

Actual Behavior

The model does not appear in the catalog, and forcing it fails immediately during client-side catalog validation (no network request is made):

Error: Model unavailable: opencode/muse-spark-1.3-contributor-free

opencode --version reports v2.0.32.

Additional Context

The last successful use was on 2026-10-11 18:34 (session "Checking what's new in laptop", opencode v1.18.35). Earlier usage spans 2026-09-27 through 2026-10-03 on v1.18.32/v1.18.34. All sessions used providerID: opencode, variant: high, cost: 0.

Metadata captured from the locally cached catalog snapshot (from the session store) while the model was live:

{
  "id": "muse-spark-1.3-contributor-free",
  "name": "Muse Spark 1.3 Free",
  "description": "Muse Spark 1.3 is a multimodal reasoning model from Meta for coding and agentic workflows.",
  "family": "muse-free",
  "attachment": true,
  "reasoning": true,
  "reasoning_options": [{ "type": "effort", "values": ["minimal", "low", "medium", "high", "xhigh"] }],
  "tool_call": true,
  "structured_output": true,
  "temperature": true,
  "release_date": "2026-09-02",
  "last_updated": "2026-09-02",
  "modalities": { "input": ["text", "image", "video", "pdf", "audio"], "output": ["text"] },
  "open_weights": false,
  "limit": { "context": 1048576, "output": 131072 },
  "provider": { "npm": "@ai-sdk/openai" },
  "cost": { "input": 0, "output": 0, "cache_read": 0 }
}

Related model ids that also appeared in the catalog previously: muse-spark-1.2-contributor-free ("Muse Spark 1.2 Free", released 2026-08-05) and an earlier muse-spark-1.1. If the intent is that the free Muse Spark tier rotates, a deprecation notice plus a documented successor id in the catalog would avoid this confusion.

Frequency: consistently reproducible on v2.0.32 (100% of attempts).

Workarounds tried: none succeeded. The failure occurs before any request is sent, so no auth, network, or region workaround applies.

Related change: the disappearance lines up with the 1.18.x to 2.0.x upgrade; the model was present and working in the last 1.18.x sessions and absent after updating.

Request: please confirm whether muse-spark-1.3-contributor-free was retired intentionally, and if so whether a replacement free Muse model will be offered.