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Muse Spark 1.3 (Contributor)

FTI
29–34

3 sources, 2 independent of the vendor: centre 32; the sources disagree widely, so shown as a band.

how FTI is computed

3 sources · between #3 and #9 of the 72 with an FTI score
Context1Mtokens
Imagesyesimage input
Free now0 of 1channels
Tested by us1 of 1channels measured

Where it's free now 1 channel tracked

OpenCode Zen ended
ended 14 days ago
Oct 20
works · Oct 710 parallel
Checked Oct 20 · catalogue

Free periods one bar per channel; markers are events

free so farpast announced endofficial end aheadinferred end aheadno end announcedended / not answering● event · ◆ end announced · tap one to see it

What happened newest first · times link to the source

Tue, Oct 2014 days ago
endedMuse Spark 1.3 (Contributor) · OpenCode Zenended
opencode/muse-spark-1.3-contributor-free is no longer in the OpenCode Zen free model list at the 2026-10-20T08:00Z daily check; it was there, and answering 10 parallel agent runs, on 2026-10-07; no end date announced → end date Oct 20
Source: Daily free-catalogue check of the OpenCode Zen model list (own tool)
Tue, Oct 628 days ago
15:30stopped answeringMuse Spark 1.3 (Contributor) · OpenCode Zenended Muse Spark 1.2 (Contributor) · OpenCode Zenended
Retested through the OpenCode CLI without an account: 1.3 timed out after 180 s, 1.2 returned "Unexpected server error"; both stay listed. Possibly needs a signed-in account that grants the training permission (not verified)
Source: own check
listedNemotron 3 Ultra (550B-A55B) · OpenCode Zenended Ling 3.0 Flash Fin · OpenCode Zenended MiMo V2.5 · OpenCode Zenended JEV 1.13 · OpenCode Zenended Big Pickle · OpenCode Zenlive Muse Spark 1.3 (Contributor) · OpenCode Zenended Muse Spark 1.2 (Contributor) · OpenCode Zenended
In OpenCode Zen's free list (-free models); our test call failed (server error, upstream overload or timeout)
Source: OpenCode Zen docs
limit changedMuse Spark 1.3 (Contributor) · OpenCode Zenended Muse Spark 1.2 (Contributor) · OpenCode Zenended
Conditions found: the Contributor models need a signed-in Zen account with an explicit data-training opt-in, use the Responses API, and are limited to Meta's allowed regions (many RegionError reports outside the US); this explains our anonymous test failures
Source: OpenCode Zen docs
Wed, Sep 2
listedMuse Spark 1.3 (Contributor) · OpenCode Zenended
Added to the Zen model docs: Muse Spark 1.3 (Contributor)
Source: OpenCode repo commit

Channel details

OpenCode Zen ended✕ humans✕ agents

Tested by us
works · Oct 710 parallelper-IP limit
ⓘreal coding, retrieval and synthesis tasks passed · checked Oct 7
Model ID
opencode/muse-spark-1.3-contributor-free
To start
$0 · no account Free models run inside the OpenCode app with no account; the Zen API key route needs billing details
Use it
CLI only
Free condition
Inside the OpenCode app, no account; the raw API refuses free models (403 FreeTierError); needs a Zen account and the per-model opt-in that lets Meta train on your prompts; Responses API only
Limit (stated)
100/min
ⓘMeta's own API cap, per team
Started
Sep 2
End
ended 14 days ago Oct 20no end announced; observed gone from the Zen free catalogue on 2026-10-20
Data policy
may train
Channel type
agent tool
Checked
Oct 20 · catalogue