Is GLM 5.1 a good deal?

As of Oct 16, 2026, GLM 5.1 is dominated for Balanced on LMArena. MiMo-V2.6-Pro scores 27.7 higher and costs 70% less, with a covering envelope. 12 of 144 rated, priced standard models are undominated.

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MiMo-V2.6-Pro is both better and cheaper than GLM 5.1: 27.7 points higher on LMArena and 70% less per million tokens, $1.29 cheaper at this mix.

GLM 5.1 takes text, returns up to 128,000 tokens from a 204,800-token context, and is listed by 13 sellers.

Compared against 144 rated, priced models on this lens: 5 models dominate it and give up nothing, 1 more dominates it but gives something up. GLM 5.1 scores 1462.6 at $1.83 per million tokens for this mix.

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
MiMo-V2.6-Pro	1490.3 +27.7	$0.540/M	70%
GLM 5.3	1471.4 +8.8	$1.00/MPrice under confirmation since Oct 12, 2026	45%
GLM 5.3 Flash	1471.0 +8.4	$0.238/MPrice under confirmation since Oct 12, 2026	87%
GLM 5.2	1470.0 +7.4	$1.12/MPrice under confirmation since Oct 12, 2026	39%
MiMo-V2.5-Pro	1465.1 +2.5	$0.544/MPrice under confirmation since Oct 16, 2026	70%

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 3.6 Flash	1479.5	$1.50/M	max output

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