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Model comparison

GPT-OSS 120B vs LFM2.5-8B-A1B

Data verified

Head-to-head evidence from 12 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

49.97/100
Margin
8.7pts
← winning
41.25/100
0 category wins0 category wins

BenchAlign evidence: GPT-OSS 120B supported; LFM2.5-8B-A1B estimated. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. GPT-OSS 120B and LFM2.5-8B-A1B share 12 comparable benchmark results. 0 of 8 categories are comparable. 16 results are unique to GPT-OSS 120B; 6 to LFM2.5-8B-A1B.

Updated July 16, 2026
Shared results
12
GPT-OSS 120B only
16
LFM2.5-8B-A1B only
6
Comparable categories
0 / 8

Benchmark data for GPT-OSS 120B and LFM2.5-8B-A1B is coming soon on BenchLM.

Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 5 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.

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 GPT-OSS 120B and LFM2.5-8B-A1B
CategoryGPT-OSS 120BΔLFM2.5-8B-A1B
MathGPT-OSS 120BNot measuredMarginNo overlapLFM2.5-8B-A1B50.0
Inst. FollowingGPT-OSS 120BNot measuredMarginNo overlapLFM2.5-8B-A1B68.8

Operational comparison

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

MetricGPT-OSS 120BLFM2.5-8B-A1BComparison
Input / output priceUSD per 1M tokensGPT-OSS 120B$0 input / $0 outputLFM2.5-8B-A1B$0 input / $0 outputListed prices are equal.
Generation speedtokens per secondGPT-OSS 120B262 tok/sLFM2.5-8B-A1BNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenGPT-OSS 120B0.79 sLFM2.5-8B-A1BNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensGPT-OSS 120B128KLFM2.5-8B-A1B128KListed context windows are equal.

Benchmark Deep Dive

Agentic
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
AA Agentic IndexSource 13.2%—Not comparable
APEX-Agents-AASource 3.1%—Not comparable
τ²-bench resultsSource 65.8%16.1%GPT-OSS 120B leads
GDPval-AASource 15.0%—Not comparable
GDPval-AASource 799—Not comparable
Gert LabsSource 29.61%—Not comparable
AA EnterpriseOps-GymSource 25.5%—Not comparable
AA Harvey LABSource 0.0%—Not comparable
AA ITBenchSource 5.6%—Not comparable
BFCL v4Source —49.7%Not comparable
Coding
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
React Native EvalsSource 71.6%—Not comparable
AA Coding IndexSource 30.4%—Not comparable
Terminal-Bench HardSource 23.5%4.5%GPT-OSS 120B leads
AA-SciCodeSource 38.9%7.8%GPT-OSS 120B leads
AA LiveCodeBenchSource 87.8%—Not comparable
Reasoning
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
AA-LCRSource 50.7%0.0%GPT-OSS 120B leads
CritPtSource 1.1%0.0%GPT-OSS 120B leads
Knowledge
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
Artificial Analysis Intelligence IndexSource 23.8%8.3%GPT-OSS 120B leads
AA-GPQA DiamondSource 78.2%51.3%GPT-OSS 120B leads
AA-HLESource 18.5%6.9%GPT-OSS 120B leads
AA-Omniscience IndexSource -50.0%-33.3%LFM2.5-8B-A1B leads
AA-Omniscience AccuracySource 21.5%9.4%GPT-OSS 120B leads
AA-Omniscience Hallucination RateSource 91.2%47.0%LFM2.5-8B-A1B leads
AA Openness IndexSource 38.9%—Not comparable
AA MMLU-ProSource 80.8%—Not comparable
Math
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
AA AIME 2025Source 93.4%—Not comparable
MATH-500Source —88.8%Not comparable
AIME 2025Source —42.5%Not comparable
AIME26Source —50.0%Not comparable
Multilingual
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
AA Global-MMLU-LiteSource 82.8%—Not comparable
Multimodal
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
Design Arena WebsiteSource 1002—Not comparable
Inst. Following
BenchmarkGPT-OSS 120BLFM2.5-8B-A1BResult
AA-IFBenchSource 69.0%55.6%GPT-OSS 120B leads
IFEvalSource —91.8%Not comparable
IFBenchSource —56.5%Not comparable
Frequently Asked Questions (3)

Can I compare GPT-OSS 120B and LFM2.5-8B-A1B on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for GPT-OSS 120B and LFM2.5-8B-A1B today?

GPT-OSS 120B: $0.00 input / $0.00 output per 1M tokens LFM2.5-8B-A1B: $0.00 input / $0.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

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