GLM-4.5 vs Grok 4 Fast (Reasoning)

Change models
IndexAll categories, out of 100.
45.7 ±9.2 best
45.3 ±4.3
GapIndex points below the top.
Top
−0.4 · no clear gap
CoverageIndex weight that has results.
65%
95% best
SpeedOutput tokens per second.
25/s
—
EloLMArena rating and rank.
1430 best
1400
ReleasedMonth of release.
2025-07
2025-09
Input / 1MUS dollars per 1M input tokens.
$0.60
—
Output / 1MUS dollars per 1M output tokens.
$2.20
—
1K chats2K tokens in, 500 out, each.
$2.30
—
1K documents20K tokens in, 1K out, each.
$14.20
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1K agent tasks200K tokens in, 20K out, each.
$164.00
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ContextMaximum tokens in one request.
131K
2M best
AgenticMulti-step tasks with tools.
48.1 best
42.9
CodingCode writing and repair.
43.3
44.9 best
ReasoningLogic problems and puzzles.
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47.8
MultimodalTasks with images and text.
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42.7
KnowledgeFacts and expert knowledge.
45.1
46.6 best
MultilingualTasks in many languages.
—
—
InstructionTasks with strict prompt rules.
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36.2
MathMath problems.
48.4
55.4 best

Benchmarks

11 shared
Only GLM-4.5: 5Only Grok 4 Fast (Reasoning): 24
GLM-4.5
Grok 4 Fast (Reasoning)
75.6%114 / 149
80.6% best84 / 149
TaxEval v2Finance
72.4%62 / 143
75.7% best12 / 143
67.4%96 / 142
79.0% best74 / 142
72.2%88 / 135
85.4% best48 / 135
MMLU ProKnowledge
81.2% best82 / 135
79.7%93 / 135
CorpFin v2Finance
61.0%60 / 131
66.9% best15 / 131
AIMEMath
86.7%31 / 95
91.3% best25 / 95
MedQAHealthcare
90.0%50 / 95
92.1% best35 / 95
MGSMMultilingual
90.8%37 / 74
90.9% best31 / 74
IOI v1Coding
2.9%53 / 61
11.5% best33 / 61
41.3% best18 / 47
27.5%35 / 47