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Model comparison

GLM-5 vs LFM2.5-8B-A1B

Data verified

Head-to-head evidence from 14 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

Z.AI
65.98/100
Margin
24.7pts
← winning
41.25/100
2 category wins0 category wins

Verified leaderboard positions: GLM-5 #15; LFM2.5-8B-A1B unranked

BenchAlign evidence: GLM-5 supported; LFM2.5-8B-A1B estimated. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. GLM-5 and LFM2.5-8B-A1B share 14 comparable benchmark results. 2 of 8 categories are comparable. 36 results are unique to GLM-5; 4 to LFM2.5-8B-A1B.

Updated July 16, 2026
Shared results
14
GLM-5 only
36
LFM2.5-8B-A1B only
4
Comparable categories
2 / 8

Pick GLM-5 if you want the stronger benchmark profile. LFM2.5-8B-A1B only becomes the better choice if you want the cheaper token bill or you want the stronger reasoning-first profile.

Confidence note. This is a partial-evidence comparison with 14 shared benchmark results across 6 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

GLM-5 is clearly ahead on the provisional aggregate, 63 to 37. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

GLM-5's sharpest advantage is in instruction following, where it averages 92.6 against 68.8. The single biggest benchmark swing on the page is AIME26, 95.8% to 50.0%.

GLM-5 is also the more expensive model on tokens at $1.00 input / $3.20 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for LFM2.5-8B-A1B. That is roughly Infinityx on output cost alone. LFM2.5-8B-A1B is the reasoning model in the pair, while GLM-5 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. GLM-5 gives you the larger context window at 200K, compared with 128K for LFM2.5-8B-A1B.

Category breakdown

Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.

Category scores and score margins for GLM-5 and LFM2.5-8B-A1B
CategoryGLM-5ΔLFM2.5-8B-A1B
Inst. FollowingGLM-592.6Margin 23.8LFM2.5-8B-A1B68.8
MathGLM-556.3Margin 6.3LFM2.5-8B-A1B50.0
AgenticGLM-556.2MarginNo overlapLFM2.5-8B-A1BNot measured
CodingGLM-566.3MarginNo overlapLFM2.5-8B-A1BNot measured
ReasoningGLM-560.8MarginNo overlapLFM2.5-8B-A1BNot measured
KnowledgeGLM-566.6MarginNo overlapLFM2.5-8B-A1BNot measured
MultilingualGLM-583.1MarginNo overlapLFM2.5-8B-A1BNot measured

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · GLM-5B · LFM2.5-8B-A1B
  1. AIME26

    Math
    Source ↗
    A 95.8%B 50.0%
    Winner: GLM-5Δ 45.8
    AIME26: GLM-5 scored 95.8%; LFM2.5-8B-A1B scored 50.0%. GLM-5 wins this benchmark.
  2. IFEval

    Inst. Following
    Source ↗
    A 92.6%B 91.8%
    Winner: GLM-5Δ 0.8
    IFEval: GLM-5 scored 92.6%; LFM2.5-8B-A1B scored 91.8%. GLM-5 wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricGLM-5LFM2.5-8B-A1BComparison
Input / output priceUSD per 1M tokensGLM-5$1 input / $3.2 outputLFM2.5-8B-A1B$0 input / $0 outputLFM2.5-8B-A1B has the lower combined listed price.
Generation speedtokens per secondGLM-574 tok/sLFM2.5-8B-A1BNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenGLM-51.64 sLFM2.5-8B-A1BNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensGLM-5200KLFM2.5-8B-A1B128KGLM-5 lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkGLM-5LFM2.5-8B-A1BResult
Terminal-Bench 2.0Source 56.2%Not comparable
Claw-EvalSource 57.7%Not comparable
QwenClawBenchSource 54.1%Not comparable
τ³-bench resultsSource 65.6%Not comparable
DeepPlanningSource 14.6%Not comparable
ToolathlonSource 38%Not comparable
MCP AtlasSource 31.1%Not comparable
MCP-TasksSource 60.8%Not comparable
WideResearchSource 69.8%Not comparable
τ²-bench resultsSource 98.2%16.1%GLM-5 leads
CyberGymSource 43.2%Not comparable
APEX-Agents-AASource 14.5%Not comparable
Gert LabsSource 50.99%Not comparable
BFCL v4Source 49.7%Not comparable
Coding
BenchmarkGLM-5LFM2.5-8B-A1BResult
SWE-bench VerifiedSource 77.8%Not comparable
SWE-bench Verified*Source 72.8%Not comparable
SWE-bench ProSource 55.1%Not comparable
SWE MultilingualSource 73.3%Not comparable
SWE-RebenchSource 62.8%Not comparable
React Native EvalsSource 74.8%Not comparable
Terminal-Bench HardSource 43.2%4.5%GLM-5 leads
AA-SciCodeSource 46.2%7.8%GLM-5 leads
Reasoning
BenchmarkGLM-5LFM2.5-8B-A1BResult
LongBench v2Source 60.8%Not comparable
AI-NeedleSource 63.3%Not comparable
AA-LCRSource 63.3%0.0%GLM-5 leads
CritPtSource 2.0%0.0%GLM-5 leads
Knowledge
BenchmarkGLM-5LFM2.5-8B-A1BResult
GPQASource 86%Not comparable
GPQA-DSource 86.0%Not comparable
SuperGPQASource 66.8%Not comparable
MMLU-ProSource 85.7%Not comparable
MMLU-Pro (Arcee)Source 85.8%Not comparable
HLESource 50.4%Not comparable
Artificial Analysis Intelligence IndexSource 39.5%8.3%GLM-5 leads
AA-GPQA DiamondSource 82.0%51.3%GLM-5 leads
AA-HLESource 27.2%6.9%GLM-5 leads
AA-Omniscience IndexSource 2.0%-33.3%GLM-5 leads
AA-Omniscience AccuracySource 26.9%9.4%GLM-5 leads
AA-Omniscience Hallucination RateSource 34.0%47.0%GLM-5 leads
MathGLM-5 wins
BenchmarkGLM-5LFM2.5-8B-A1BResult
AIME26Source 95.8%50.0%GLM-5 leads
AIME25 (Arcee)Source 93.3%Not comparable
HMMT Feb 2025Source 97.5%Not comparable
HMMT Nov 2025Source 96.9%Not comparable
HMMT Feb 2026Source 86.4%Not comparable
MMAnswerBenchSource 82.5%Not comparable
FrontierMath v2 (Tiers 1-3)Source 16.434%Not comparable
FrontierMath v2 (Tier 4)Source 2.100%Not comparable
MATH-500Source 88.8%Not comparable
AIME 2025Source 42.5%Not comparable
Multilingual
BenchmarkGLM-5LFM2.5-8B-A1BResult
MMLU-ProXSource 83.1%Not comparable
NOVA-63Source 55.1%Not comparable
Multimodal
BenchmarkGLM-5LFM2.5-8B-A1BResult
Design Arena WebsiteSource 1282Not comparable
Inst. FollowingGLM-5 wins
BenchmarkGLM-5LFM2.5-8B-A1BResult
IFEvalSource 92.6%91.8%GLM-5 leads
AA-IFBenchSource 72.3%55.6%GLM-5 leads
IFBenchSource 56.5%Not comparable
Frequently Asked Questions (3)

Which is better, GLM-5 or LFM2.5-8B-A1B?

GLM-5 is ahead on BenchLM's provisional leaderboard, 63 to 37. The biggest single separator in this matchup is AIME26, where the scores are 95.8% and 50.0%.

Which is better for math, GLM-5 or LFM2.5-8B-A1B?

GLM-5 has the edge for math in this comparison, averaging 56.3 versus 50. Inside this category, AIME26 is the benchmark that creates the most daylight between them.

Which is better for instruction following, GLM-5 or LFM2.5-8B-A1B?

GLM-5 has the edge for instruction following in this comparison, averaging 92.6 versus 68.8. Inside this category, AA-IFBench is the benchmark that creates the most daylight between them.

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Last updated: July 16, 2026

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