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Gemini 3.1 Flash Lite Preview vs Kimi K2.5

Kimi K2.5 leads Gemini 3.1 Flash Lite Preview on coding, 38.6 to 22.7 on the Vibe Coding Index, and Gemini 3.1 Flash Lite Preview costs 1.9x less per output token ($1.50 vs $2.85 per million). Updated October 22, 2026; 72 benchmarks have a result for both.

Replace Gemini 3.1 Flash Lite Preview Replace Kimi K2.5
Gemini 3.1 Flash Lite PreviewGoogle
Coding
22.7
Overall
36.6
Output $/M
$1.50
6
Kimi K2.5Moonshot AI
Coding
38.6
Overall
44.8
Output $/M
$2.85
66
vs boards won of 72 shared

Gemini 3.1 Flash Lite Preview or Kimi K2.5: which to pick

Pick Kimi K2.5 for coding: it scores 38.6 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview.

Pick Gemini 3.1 Flash Lite Preview for output tokens 1.9x cheaper ($1.50 vs $2.85 per million) and a lower cost per solved task ($0.18 against $0.24).

Model AGemini 3.1 Flash Lite PreviewGoogle22.7/1003 independent benchmarks$0.18 per solved taskModel BKimi K2.5Moonshot AI38.6/1003 independent benchmarks$0.24 per solved task
Shared results
72
Gemini 3.1 Flash Lite Preview only
7
Kimi K2.5 only
27
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Gemini 3.1 Flash Lite Preview 22.7 from 3 benchmarks, Kimi K2.5 38.6 from 3 benchmarks.
Widest category
Web design, 17.2 points apart on average over 8 shared benchmarks.
Widest single gap
LMArena WebDev: React: Gemini 3.1 Flash Lite Preview 1245 against Kimi K2.5 1429, 30.7 points apart on a 0 to 100 scale.
Output price
Gemini 3.1 Flash Lite Preview $1.50 against Kimi K2.5 $2.85 per million output tokens, 1.9x apart.
Context window
Gemini 3.1 Flash Lite Preview takes 1.05M tokens, Kimi K2.5 262K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryGemini 3.1 Flash Lite PreviewBarsKimi K2.5Ties
Coding013
Intelligence01
Agentic work03
Reasoning07
Math03
Knowledge37
Web design17
General225
All shared boards666
CodingLike-for-likeSix of these boards feed the Vibe Coding Index013
Coding benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
SWE-bench VerifiedNot measured70.8%Only Kimi K2.5 measured
SWE-bench MultilingualNot measured67.3%Only Kimi K2.5 measured
LMArena WebDev12571437Kimi K2.5
AA Coding Index34.746.8Kimi K2.5
LiveCodeBench (Vals AI)80.1%83.9%Kimi K2.5
SWE-bench Verified (Vals AI)62.8%70.0%Kimi K2.5
Vibe Code Bench (Vals AI)0.0%17.5%Kimi K2.5
Code migration (Vals AI)4.6%7.0%Kimi K2.5
ProgramBench (Vals AI)0.0%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Terminal-Bench 2.1 (Vals AI)34.1%42.0%Kimi K2.5
Terminal-Bench Hard (Artificial Analysis run)Not measured34.8%Only Kimi K2.5 measured
Terminal-BenchNot measured43.2%Only Kimi K2.5 measured
WeirdMLNot measured45.6%Only Kimi K2.5 measured
ALE-Bench797.7821.6Kimi K2.5
LMArena Text: coding14001483Kimi K2.5
LMArena Text: software and IT14131471Kimi K2.5
LMArena WebDev: React12451429Kimi K2.5
LMArena WebDev: HTML12761426Kimi K2.5
LMArena WebDev: from an image13361439Kimi K2.5
SciCode4.6%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 19 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
AA Intelligence Index15.623.5Kimi K2.5
Epoch Capabilities IndexNot measured148.1Only Kimi K2.5 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index03
Agentic work benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
AA Agentic Index1.6Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Design Arena: agents building web appsNot measured1136Only Kimi K2.5 measured
Design Arena: agents building full-stack appsNot measured1114Only Kimi K2.5 measured
Design Arena: agents building mobile appsNot measured1147Only Kimi K2.5 measured
Design Arena: agents building Android appsNot measured1118Only Kimi K2.5 measured
Design Arena: agents building Godot gamesNot measured1219Only Kimi K2.5 measured
Finance Agent (Vals AI)30.0%35.8%Kimi K2.5
Tax Agent Bench (Vals AI)3.1%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Legal Research Bench (Vals AI)3.4%15.9%Kimi K2.5
Excel Modeling Benchmark (Vals AI)8.6%28.5%Kimi K2.5
τ²-Bench TelecomNot measured95.9%Only Kimi K2.5 measured
OSWorldNot measured63.3%Only Kimi K2.5 measured
Vending-Bench 2Not measured$1,198Only Kimi K2.5 measured
Neither model has a result on the other 28 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index07
Reasoning benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
GPQA Diamond81.1%84.1%Kimi K2.5
MMMU Pro (Vals AI)82.5%84.3%Kimi K2.5
GPQA Diamond (Artificial Analysis run)Not measured87.9%Only Kimi K2.5 measured
Humanity's Last Exam (Artificial Analysis run)Not measured30.7%Only Kimi K2.5 measured
ARC-AGINot measured65.3%Only Kimi K2.5 measured
ARC-AGI-2Not measured11.8%Only Kimi K2.5 measured
SimpleBenchNot measured46.8%Only Kimi K2.5 measured
LMArena Text: hard prompts14071453Kimi K2.5
LMArena Text: expert13981466Kimi K2.5
LMArena Text: hard prompts in English14031460Kimi K2.5
LMArena Vision: diagrams12421282Kimi K2.5
LMArena Vision: homework12711297Kimi K2.5
Kagi LLM BenchmarkNot measured78.5%Only Kimi K2.5 measured
Neither model has a result on the other 9 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
AIME83.3%95.6%Kimi K2.5
LMArena Text: math14281470Kimi K2.5
LMArena Text: mathematical work14171473Kimi K2.5
Neither model has a result on the other 10 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index37
Knowledge benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
MMLU Pro86.2%85.9%Gemini 3.1 Flash Lite Preview
LegalBench (Vals AI)83.8%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
CaseLaw (Vals AI)55.0%58.7%Kimi K2.5
CorpFin (Vals AI)59.4%68.3%Kimi K2.5
TaxEval (Vals AI)71.8%74.2%Kimi K2.5
MortgageTax (Vals AI)68.0%66.5%Gemini 3.1 Flash Lite Preview
MedQA (Vals AI)Not measured94.4%Only Kimi K2.5 measured
MedCode (Vals AI)47.6%39.3%Gemini 3.1 Flash Lite Preview
SimpleQA VerifiedNot measured34.3%Only Kimi K2.5 measured
LMArena Text: science14251459Kimi K2.5
LMArena Text: medicine and healthcare14281448Kimi K2.5
LMArena Text: legal and government14181441Kimi K2.5
LMArena Text: business and finance13891427Kimi K2.5
FACTS Benchmark Suite51.4%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index17
Web design benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
Design Arena: websites10821248Kimi K2.5
Design Arena: UI components10691234Kimi K2.5
Design Arena: game dev10291206Kimi K2.5
Design Arena: data viz10451219Kimi K2.5
Design Arena: 3D10471204Kimi K2.5
Design Arena: all code categories10721236Kimi K2.5
Design Arena: SVG10521149Kimi K2.5
Design Arena: ASCII art11671166Gemini 3.1 Flash Lite Preview
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index225
General benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
SAGE (Vals AI)49.5%49.9%Kimi K2.5
MedScribe (Vals AI)63.9%76.4%Kimi K2.5
Vals Multimodal Index41.4%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
IFBenchNot measured70.2%Only Kimi K2.5 measured
Long context reasoning (AA-LCR)Not measured78.0%Only Kimi K2.5 measured
Fiction.LiveBenchNot measured86.1%Only Kimi K2.5 measured
CL-benchNot measured19.3%Only Kimi K2.5 measured
CL-bench LifeNot measured13.2%Only Kimi K2.5 measured
LMArena Text14161445Kimi K2.5
LMArena Text: instruction following13771431Kimi K2.5
LMArena Text: creative writing14011422Kimi K2.5
LMArena Vision12401269Kimi K2.5
LMArena Text: English14141453Kimi K2.5
LMArena Text: non-English14101433Kimi K2.5
LMArena Text: Chinese14601494Kimi K2.5
LMArena Text: German14301441Kimi K2.5
LMArena Text: Japanese14131423Kimi K2.5
LMArena Text: Korean13921412Kimi K2.5
LMArena Text: French14241454Kimi K2.5
LMArena Text: Spanish14211450Kimi K2.5
LMArena Text: Russian14201435Kimi K2.5
LMArena Text: Polish14431445Kimi K2.5
LMArena Text: multi-turn14171444Kimi K2.5
LMArena Text: longer queries13941445Kimi K2.5
LMArena Text: writing and language14081425Kimi K2.5
LMArena Text: entertainment and media13861417Kimi K2.5
LMArena Vision: English12321274Kimi K2.5
LMArena Vision: Chinese12781328Kimi K2.5
LMArena Vision: reading text12461276Kimi K2.5
LMArena Vision: humor12661284Kimi K2.5
LMArena Vision: captioning12591257Gemini 3.1 Flash Lite Preview
LMArena Vision: recognizing things13081285Gemini 3.1 Flash Lite Preview
LMArena Vision: creative writing12481269Kimi K2.5
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 3.1 Flash Lite Preview and Kimi K2.5
BenchmarkGemini 3.1 Flash Lite PreviewKimi K2.5Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Gemini 3.1 Flash Lite Preview$0.0010Fits in one request
Kimi K2.5$0.0020Fits in one request

Gemini 3.1 Flash Lite Preview costs less

Repository review

50K input + 3K output tokens

Gemini 3.1 Flash Lite Preview$0.017Fits in one request
Kimi K2.5$0.035Fits in one request

Gemini 3.1 Flash Lite Preview costs less

Agent loop

200K input + 10K output tokens

Gemini 3.1 Flash Lite Preview$0.065Fits in one request
Kimi K2.5$0.135Fits in one request

Gemini 3.1 Flash Lite Preview costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Gemini 3.1 Flash Lite Preview and Kimi K2.5
SpecificationGoogle Gemini 3.1 Flash Lite PreviewMoonshotAI Kimi K2.5
MakerGoogleMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedMarch 3, 2026January 27, 2026
Context window1.05M262K
Input $/Mtok$0.25$0.532
Output $/Mtok$1.50$2.85
Coding index22.738.6
Independent measurements behind it33
Cost per solved task$0.18$0.24
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 3.1 Flash Lite Preview better than Kimi K2.5 for coding?

Pick Kimi K2.5 for coding: it scores 38.6 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview. Pick Gemini 3.1 Flash Lite Preview for output tokens 1.9x cheaper ($1.50 vs $2.85 per million) and a lower cost per solved task ($0.18 against $0.24).

Which is cheaper, Gemini 3.1 Flash Lite Preview or Kimi K2.5?

Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens; Kimi K2.5 costs $0.532 and $2.85. Per solved SWE-bench Verified task, Gemini 3.1 Flash Lite Preview costs $0.18 and Kimi K2.5 $0.24.

Which has the bigger context window, Gemini 3.1 Flash Lite Preview or Kimi K2.5?

Gemini 3.1 Flash Lite Preview, with 1.05M tokens against 262K.

How many benchmarks is the Gemini 3.1 Flash Lite Preview vs Kimi K2.5 comparison based on?

72 benchmarks have a result for both models as of October 22, 2026. Gemini 3.1 Flash Lite Preview's coding index rests on 3 independent benchmarks and Kimi K2.5's on 3. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gemini-3-1-flash-lite-preview-vs-kimi-k2-5">LLMBenchmark.ai, Gemini 3.1 Flash Lite Preview vs Kimi K2.5</a></p>