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9 undominated of 134 · Aug 28, 2026

As of Aug 28, 2026, GLM 5.3 is dominated for Balanced on LMArena. Muse Spark 1.1 scores 1.4 higher and costs 7% less, with a covering envelope. 9 of 134 rated, priced standard models are undominated.

134 rated, priced standard models. Chartreuse is the frontier. Cobalt is the model you named, when it is not on the staircase.

Muse Spark 1.1 is both better and cheaper than GLM 5.3.

GLM 5.3

LMArena Elo

1476.9

Effective $/M · Balanced

$2.15/M

Muse Spark 1.1

LMArena Elo

1478.3

Effective $/M · Balanced

$2.00/M

Envelope-safe replacements

Each row scores at least as high, costs no more, and covers this model’s context, output, modalities, tools, and reasoning. A cheaper narrower model is not listed here.

Model	LMArena	Effective $/M	You save
Muse Spark 1.1	1478.3 +1.4	$2.00/M	7%

Higher score, lower price, named losses

Not a drop-in. The loss is why these are not a recommendation.

Model	LMArena	Effective $/M	You give up
Gemini 3.7 Flash	1490.2	$0.750/M	max output

Open the frontier

This page does not mail you. The URL is the watch: same model, same mix, current catalogue.