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Model comparison

Gemini 3.5 Flash-Lite vs GPT-5.2

Data verified

Head-to-head evidence from 11 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

N/A
No comparison
GPT-5.2
OpenAI
58.43/100
2 category wins1 category wins

Public leaderboard positions: Gemini 3.5 Flash-Lite unranked (Not scored); GPT-5.2 #64 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Gemini 3.5 Flash-Lite and GPT-5.2 share 11 comparable benchmark results. 3 of 8 categories are comparable. 10 results are unique to Gemini 3.5 Flash-Lite; 17 to GPT-5.2.

Updated July 21, 2026
Shared results
11
Gemini 3.5 Flash-Lite only
10
GPT-5.2 only
17
Comparable categories
3 / 8

Treat this as a split decision. Gemini 3.5 Flash-Lite makes more sense if reasoning is the priority or you want the cheaper token bill; GPT-5.2 is the better fit if coding is the priority.

Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 4 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Gemini 3.5 Flash-Lite and GPT-5.2 finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.

GPT-5.2 is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $0.30 input / $2.50 output per 1M tokens for Gemini 3.5 Flash-Lite. That is roughly 5.6x on output cost alone. Gemini 3.5 Flash-Lite gives you the larger context window at 1M, compared with 400K for GPT-5.2.

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 Gemini 3.5 Flash-Lite and GPT-5.2
CategoryGemini 3.5 Flash-LiteΔGPT-5.2
ReasoningGemini 3.5 Flash-Lite72.2Margin← 19.3GPT-5.252.9
CodingGemini 3.5 Flash-Lite54.2Margin→ 16.4GPT-5.270.6
AgenticGemini 3.5 Flash-Lite63.4Margin← 7.7GPT-5.255.7
KnowledgeGemini 3.5 Flash-LiteNot measuredMarginNo overlapGPT-5.292.4
MathGemini 3.5 Flash-LiteNot measuredMarginNo overlapGPT-5.235.2
MultimodalGemini 3.5 Flash-LiteNot measuredMarginNo overlapGPT-5.280.4

Decisive benchmark drivers

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

More
A · Gemini 3.5 Flash-LiteB · GPT-5.2

  1. OSWorld-Verified

    Agentic
    Source ↗
    A 74%B 47.3%
    Winner: Gemini 3.5 Flash-LiteΔ 26.7
    OSWorld-Verified: Gemini 3.5 Flash-Lite scored 74%; GPT-5.2 scored 47.3%. Gemini 3.5 Flash-Lite wins this benchmark.

  2. SWE-bench Pro

    Coding
    Source ↗
    A 54.2%B 55.6%
    Winner: GPT-5.2Δ 1.4
    SWE-bench Pro: Gemini 3.5 Flash-Lite scored 54.2%; GPT-5.2 scored 55.6%. GPT-5.2 wins this benchmark.

Operational comparison

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

MetricGemini 3.5 Flash-LiteGPT-5.2Comparison
Input / output priceUSD per 1M tokensGemini 3.5 Flash-Lite$0.3 input / $2.5 outputGPT-5.2$1.75 input / $14 outputGemini 3.5 Flash-Lite has the lower combined listed price.
Generation speedtokens per secondGemini 3.5 Flash-LiteNot availableGPT-5.273 tok/sA complete speed comparison is not available.
First-answer latencyseconds to first tokenGemini 3.5 Flash-LiteNot availableGPT-5.2130.34 sA complete latency comparison is not available.
Context windowmaximum listed tokensGemini 3.5 Flash-Lite1MGPT-5.2400KGemini 3.5 Flash-Lite lists the larger context window.

Benchmark Deep Dive

AgenticGemini 3.5 Flash-Lite wins
BenchmarkGemini 3.5 Flash-LiteGPT-5.2Result
Terminal-Bench 2.0Source 54%—Not comparable
OSWorld-VerifiedSource 74%47.3%Gemini 3.5 Flash-Lite leads
GDPval-AASource 1140—Not comparable
AA Agentic IndexSource 26.8%—Not comparable
GDPval-AASource 32.0%—Not comparable
AA BriefcaseSource 634—Not comparable
AA Tau3 BankingSource 16.5%—Not comparable
BrowseCompSource —65.8%Not comparable
τ²-bench resultsSource —84.8%Not comparable
Gert LabsSource —46.54%Not comparable
JobBenchSource —34.3%Not comparable
CodingGPT-5.2 wins
BenchmarkGemini 3.5 Flash-LiteGPT-5.2Result
Terminal-Bench 2.0Source 54.0%—Not comparable
SWE-bench ProSource 54.2%55.6%GPT-5.2 leads
AA Coding IndexSource 49.3%—Not comparable
AA-SciCodeSource 40.9%52.1%GPT-5.2 leads
SWE-bench VerifiedSource —80%Not comparable
Vibe Code BenchSource —53.50%Not comparable
ReasoningGemini 3.5 Flash-Lite wins
BenchmarkGemini 3.5 Flash-LiteGPT-5.2Result
MRCRv2Source 72.2%—Not comparable
AA-LCRSource 62.0%72.7%GPT-5.2 leads
CritPtSource 0.0%11.6%GPT-5.2 leads
ARC-AGI-2Source —52.9%Not comparable
Knowledge
BenchmarkGemini 3.5 Flash-LiteGPT-5.2Result
Artificial Analysis Intelligence IndexSource 36.5%42.2%GPT-5.2 leads
AA-GPQA DiamondSource 83.8%90.3%GPT-5.2 leads
AA-HLESource 17.5%35.4%GPT-5.2 leads
AA-Omniscience IndexSource 6.9%-1.0%Gemini 3.5 Flash-Lite leads
AA-Omniscience AccuracySource 30.3%43.8%GPT-5.2 leads
AA-Omniscience Hallucination RateSource 33.5%79.7%Gemini 3.5 Flash-Lite leads
GPQASource —92.4%Not comparable
Math
BenchmarkGemini 3.5 Flash-LiteGPT-5.2Result
AA AIME 2025Source —99.0%Not comparable
FrontierMath v2 (Tiers 1-3)Source —40.700%Not comparable
FrontierMath v2 (Tier 4)Source —18.800%Not comparable
Multimodal
BenchmarkGemini 3.5 Flash-LiteGPT-5.2Result
AA-MMMU-ProSource 79.0%—Not comparable
MMMU-ProSource —79.5%Not comparable
MathVisionSource —83.0%Not comparable
CharXivSource —82.1%Not comparable
V*Source —75.9%Not comparable
Design Arena WebsiteSource —1224Not comparable
Inst. Following
BenchmarkGemini 3.5 Flash-LiteGPT-5.2Result
AA-IFBenchSource —75.4%Not comparable
Frequently Asked Questions (4)

Which is better, Gemini 3.5 Flash-Lite or GPT-5.2?

Gemini 3.5 Flash-Lite and GPT-5.2 are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.

Which is better for coding, Gemini 3.5 Flash-Lite or GPT-5.2?

GPT-5.2 has the edge for coding in this comparison, averaging 70.6 versus 54.2. Inside this category, AA-SciCode is the benchmark that creates the most daylight between them.

Which is better for reasoning, Gemini 3.5 Flash-Lite or GPT-5.2?

Gemini 3.5 Flash-Lite has the edge for reasoning in this comparison, averaging 72.2 versus 52.9. Inside this category, CritPt is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Gemini 3.5 Flash-Lite or GPT-5.2?

Gemini 3.5 Flash-Lite has the edge for agentic tasks in this comparison, averaging 63.4 versus 55.7. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.

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Last updated: July 21, 2026

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