Model comparison

Gemini 2.5 Flash-Lite vs Gemini 2.5 Pro

Gemini 2.5 Pro is the stronger model overall, scoring 45.0 to 37.0 on the Noometry Index. Gemini 2.5 Flash-Lite costs 20× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.

Last verified October 10, 2026. 32 shared benchmarks.

Gemini 2.5 Flash-Lite

Google

37.0

Rank #211 Confirmed

Gemini 2.5 Pro

Google

45.0

Rank #75 Confirmed

Summary

They share 32 benchmarks with published results for both. Gemini 2.5 Flash-Lite scores higher in 1 category and Gemini 2.5 Pro in 9 categories; 10 gaps are clear of the uncertainty.
The widest gap is in long context, where Gemini 2.5 Pro leads 59.8 to 33.3.
The biggest single-benchmark swing is Fiction.LiveBench: 47.2% for Gemini 2.5 Flash-Lite and 91.7% for Gemini 2.5 Pro.
Gemini 2.5 Flash-Lite is cheaper at $0.10 / $0.40 per million input/output tokens, against $1.25 / $10 for Gemini 2.5 Pro.

Side by side

Gemini 2.5 Flash-Lite and Gemini 2.5 Pro specifications
	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
Provider	Google	Google
Noometry Index	37.0	45.0
Released	2025-06-17	2025-03-25
Weights	Proprietary	Proprietary
Context window	1.05M	1.05M
Max output	66K	66K
Input $ / M tokens	$0.10	$1.25
Output $ / M tokens	$0.40	$10
Results tracked	33	78

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Category by category

Coding Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 38.5 (#173), Gemini 2.5 Pro: 42.4 (#101)

Coding benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
WeirdML	35.2%	54%
LMArena Coding	1373	1452
ALE-Bench	325.9	785.52
SWE-bench Verified	—	57.6%
SWE-bench Verified (bash only)	—	53.6%
Aider Polyglot	—	83.1%
LMArena WebDev	—	1227
SciCode	—	42.8%
GSO	—	3.9%
LiveBench Coding	—	85.9%
CadEval	—	64%
AlgoTune	—	1.51

Agentic & Tool Use Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 28.0 (#96), Gemini 2.5 Pro: 29.2 (#88)

Agentic & Tool Use benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
Terminal-Bench	—	32.6%
Berkeley Function Calling Leaderboard	36.9%	—
GDPval	—	23.3%
Remote Labor Index	—	0.8%
TheAgentCompany	—	30.3%
τ²-bench Banking	—	13.7%
DeepResearch Bench	—	42.8%
BALROG	—	43.3%
LMArena Search	—	1142
METR Time Horizons	—	55.4%
Vending-Bench 2	—	573.64

Reasoning Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 22.2 (#205), Gemini 2.5 Pro: 28.8 (#99)

Reasoning benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
Kagi LLM Benchmark	40.5%	70.3%
LMArena Hard Prompts	1377	1455
DTBench	62.8%	82.4%
LMCA	18.1%	34.8%
Epoch Capabilities Index	133.94	145.32
ARC-AGI-2	—	4.9%
SimpleBench	—	62.4%
ARC-AGI-1	—	41%
CritPt	—	2%
Chess Puzzles	—	20%
EnigmaEval	—	5.6%
LiveBench Reasoning	—	89.8%
LiveBench Data Analysis	—	79.9%
ForecastBench	—	61.3
LiveBench	—	82.3%

Math Gemini 2.5 Flash-Lite leads

Gemini 2.5 Flash-Lite: 38.0 (#144), Gemini 2.5 Pro: 32.5 (#213)

Math benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
Omni-MATH	48%	41.6%
LMArena Math	1373	1450
FrontierMath (Tiers 1-3)	—	24.6%
FrontierMath Tier 4	—	0%
OTIS Mock AIME 2024-2025	—	84.7%
LiveBench Math	—	90.2%
MATH Level 5	—	95.9%
FrontierMath (Feb 2025 set)	—	14.1%
FrontierMath Tier 4 (v1)	—	4.2%

Knowledge Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 32.5 (#210), Gemini 2.5 Pro: 56.0 (#46)

Knowledge benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
MMLU-Pro	53.7%	86.3%
Vectara Hallucination Rate	3.3%	7%
GPQA (HELM)	30.9%	74.9%
LMArena Expert	1373	1452
GPQA Diamond	—	85.3%
Humanity's Last Exam	—	21.6%
Confabulations	—	10.6%

Multimodal Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 29.1 (#114), Gemini 2.5 Pro: 45.2 (#18)

Multimodal benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
LMArena Vision	1198	1263
VPCT	30%	48%
GeoBench	—	86%
LMArena Document	—	1421
SpatialViz-Bench	—	44.7%

Multilingual Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 49.3 (#134), Gemini 2.5 Pro: 55.3 (#31)

Multilingual benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
LMArena Non-English	1369	1451
LMArena Chinese	1404	1507
LMArena French	1388	1472
LMArena German	1389	1487
LMArena Japanese	1359	1461
LMArena Korean	1360	1434
LMArena Russian	1373	1461
LMArena Spanish	1396	1473

Instruction Following Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 70.0 (#168), Gemini 2.5 Pro: 75.0 (#75)

Instruction Following benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
IFEval	81%	84%
LMArena Instruction Following	1367	1437
LiveBench Instruction Following	—	80.6%

Long Context Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 33.3 (#262), Gemini 2.5 Pro: 59.8 (#5)

Long Context benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
Fiction.LiveBench	47.2%	91.7%
LMArena Longer Query	1373	1449

Writing & Preference Gemini 2.5 Pro leads

Gemini 2.5 Flash-Lite: 56.8 (#135), Gemini 2.5 Pro: 63.7 (#62)

Writing & Preference benchmarks
Benchmark	Gemini 2.5 Flash-Lite	Gemini 2.5 Pro
LMArena Text	1379	1458
LMArena Creative Writing	1367	1454
WildBench	81.8%	85.7%
LMArena Multi-Turn	1366	1453
Short-Story Creative Writing	—	83.8%
EQ-Bench Creative Writing	—	1421
LiveBench Language	—	67.8%

Frequently asked questions

Is Gemini 2.5 Flash-Lite better than Gemini 2.5 Pro?

Which is cheaper, Gemini 2.5 Flash-Lite or Gemini 2.5 Pro?

Gemini 2.5 Flash-Lite is cheaper. It lists at $0.10 per million input tokens and $0.40 per million output tokens; Gemini 2.5 Pro lists at $1.25 and $10.

Is Gemini 2.5 Flash-Lite or Gemini 2.5 Pro better for coding?

Gemini 2.5 Pro scores higher on coding benchmarks: 42.4 versus 38.5 in the Noometry coding category.

Which has the bigger context window?

Both accept 1.05M tokens.

How many benchmarks do Gemini 2.5 Flash-Lite and Gemini 2.5 Pro share?

32 benchmarks have published results for both models. Gemini 2.5 Flash-Lite has 33 scored results on Noometry and Gemini 2.5 Pro has 78.