Z.aiopen weightsSupersededReasoning

GLM-5.1

Name: GLM-5.1
Author: Z.ai

Led the open-license Arena board in Apr 2026 (day approximate).

Released

Apr 15, 2026

Price in / out

—

Blended $/1M

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Context

203K

Parameters: 744B / 40B active. License: MIT.

Benchmark scoresvs GLM-5

Benchmark	Score	Δ vs prior	Rank (current)	Configuration	Source
Terminal-Bench 2.1	56.9%	—	#19 of 23	leaderboard	benchlm.ai ↗
GPQA Diamond	86.2%	+0.2	#17 of 22	leaderboard	benchlm.ai ↗
Humanity's Last Exam	52.3%	+1.9	#7 of 32	leaderboard	benchlm.ai ↗
AIME 2026	95.3%	-0.5	#1 of 2	leaderboard	benchlm.ai ↗
τ²-bench (Telecom)	97.7%	-0.5	#1 of 10	leaderboard	benchlm.ai ↗
Artificial Analysis Intelligence Index	40.2	+0.7	#12 of 17	leaderboard	benchlm.ai ↗

Version

$ in / out

Terminal-Bench

SWE-bench

GPQA

HLE

AIME

τ²-bench

GLM-4.6Superseded

—

76.9%

GLM-4.7Superseded

—

73.8%

—

24.8%

—

95.9%

GLM-5Superseded

—

77.8%

86%

50.4%

95.8%

98.2%

GLM-5.1Superseded

—

56.9%

—

86.2%

52.3%

95.3%

97.7%

GLM-5.2Superseded

$1.4 / $4.4

67.8%

—

91.2%

54.7%

99.2%

99.1%

GLM-5.3

$1.4 / $4.4

71.5%

—

88.1%

42.3%

—

GLM-5.3 Flash

—

62.9%

—

86.4%

39.9%

—

GLM-5.1

Benchmark scoresvs GLM-5

GLM versions

Compare

Shipping with it?

Current open-weight peers

Version	Released	$ in / out	Terminal-Bench	SWE-bench	GPQA	HLE	AIME	τ²-bench
GLM-4.6Superseded	2025-09-30	—	—	—	—	—	—	76.9%
GLM-4.7Superseded	2025-12-22	—	—	73.8%	—	24.8%	—	95.9%
GLM-5Superseded	2026-02-11	—	—	77.8%	86%	50.4%	95.8%	98.2%
GLM-5.1Superseded	2026-04-15	—	56.9%	—	86.2%	52.3%	95.3%	97.7%
GLM-5.2Superseded	2026-06-17	$1.4 / $4.4	67.8%	—	91.2%	54.7%	99.2%	99.1%
GLM-5.3	2026-08-14	$1.4 / $4.4	71.5%	—	88.1%	42.3%	—	—
GLM-5.3 Flash	2026-08-26	—	62.9%	—	86.4%	39.9%	—	—