Claude Haiku 4.5 vs Gemini 3 Flash Preview

Gemini 3 Flash Preview leads Claude Haiku 4.5 on coding, 43.7 to 35.6 on the Vibe Coding Index, and Gemini 3 Flash Preview costs 1.7x less per output token ($3.00 vs $5.00 per million). Updated October 22, 2026; 44 benchmarks have a result for both.

Replace Claude Haiku 4.5 Replace Gemini 3 Flash Preview

Claude Haiku 4.5Anthropic

Coding: 35.6
Overall: 41.0
Output $/M: $5.00

Gemini 3 Flash PreviewGoogle

Coding: 43.7
Overall: 55.0
Output $/M: $3.00

vs boards won of 44 shared, 1 tied

Claude Haiku 4.5 or Gemini 3 Flash Preview: which to pick

Pick Gemini 3 Flash Preview for coding: it scores 43.7 on the Vibe Coding Index against 35.6 for Claude Haiku 4.5, though on 2 benchmarks against 4.

Pick Claude Haiku 4.5 for work measured by Code migration (Vals AI) or CaseLaw (Vals AI), where it leads.

Model AClaude Haiku 4.5Anthropic35.6/1004 independent benchmarks$0.56 per solved task Model BGemini 3 Flash PreviewGoogle43.7/1002 independent benchmarks$0.37 per solved task

445127

Shared results: 44
Claude Haiku 4.5 only: 51
Gemini 3 Flash Preview 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.

Coding
Vibe Coding Index, six public coding benchmarks
Gemini 3 Flash Preview
Gemini 3 Flash Preview scores 43.7 against 35.6.
4 and 2 benchmarks behind the scores
Intelligence
AA Intelligence Index
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 26.3 against 16.9.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Claude Haiku 4.5 has a AA Agentic Index result, 8.0.
Directional only
Reasoning
GPQA Diamond
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 87.9% against 72.2%.
Same board, both measured
Math
AIME
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 95.6% against 82.7%.
Same board, both measured
Knowledge
MMLU Pro
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 88.6% against 78.7%.
Same board, both measured
Web design
Design Arena: websites
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 1196 against 1122.
Same board, both measured
Long documents
Listed context window
Gemini 3 Flash Preview
Gemini 3 Flash Preview takes 1.05M tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 3 Flash Preview
Claude Haiku 4.5 $0.0035, Gemini 3 Flash Preview $0.0020 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Gemini 3 Flash Preview
Claude Haiku 4.5 $0.56, Gemini 3 Flash Preview $0.37.
Published attempt cost and pass rate

At a glance

Coding index: Claude Haiku 4.5 35.6 from 4 benchmarks, Gemini 3 Flash Preview 43.7 from 2 benchmarks.
Widest category: Reasoning, 28.8 points apart on average over 6 shared benchmarks.
Widest single gap: SimpleQA Verified: Claude Haiku 4.5 13.2% against Gemini 3 Flash Preview 66.8%, 53.6 points apart on a 0 to 100 scale.
Output price: Claude Haiku 4.5 $5.00 against Gemini 3 Flash Preview $3.00 per million output tokens, 1.7x apart.
Context window: Claude Haiku 4.5 takes 200K tokens, Gemini 3 Flash Preview 1.05M.

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
Category	Claude Haiku 4.5	Gemini 3 Flash Preview	Ties
Coding	1	7	1 tie
Intelligence	0	1
Agentic work	0	7
Reasoning	0	6
Math	0	3
Knowledge	1	8
Web design	0	4
General	1	4
All shared boards	3	40	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index17

Coding benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
SWE-bench Verified	66.6%	75.8%	Gemini 3 Flash Preview
SWE-bench Multilingual	64.7%	Not measured	Only Claude Haiku 4.5 measured
LiveBench coding	48.1%	Not measured	Only Claude Haiku 4.5 measured
LMArena WebDev	1330	Not measured	Only Claude Haiku 4.5 measured
AA Coding Index	43.9	Not measured	Only Claude Haiku 4.5 measured
LiveCodeBench (Vals AI)	41.2%	85.6%	Gemini 3 Flash Preview
SWE-bench Verified (Vals AI)	66.6%	75.0%	Gemini 3 Flash Preview
Vibe Code Bench (Vals AI)	11.4%	20.2%	Gemini 3 Flash Preview
Code migration (Vals AI)	7.5%	6.4%	Claude Haiku 4.5
ProgramBench (Vals AI)	0.0%	0.0%	Tie
Terminal-Bench 2.1 (Vals AI)	43.8%	53.9%	Gemini 3 Flash Preview
LiveCodeBench (Artificial Analysis run)	Not measured	90.8%	Only Gemini 3 Flash Preview measured
Terminal-Bench Hard (Artificial Analysis run)	Not measured	38.6%	Only Gemini 3 Flash Preview measured
Terminal-Bench	35.5%	64.3%	Gemini 3 Flash Preview
GSO-Bench	Not measured	9.8%	Only Gemini 3 Flash Preview measured
WeirdML	45.4%	61.6%	Gemini 3 Flash Preview
ALE-Bench	Not measured	1367.2	Only Gemini 3 Flash Preview measured
LMArena Text: coding	1454	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: software and IT	1439	Not measured	Only Claude Haiku 4.5 measured
LMArena WebDev: React	1326	Not measured	Only Claude Haiku 4.5 measured
LMArena WebDev: HTML	1318	Not measured	Only Claude Haiku 4.5 measured
SciCode	Not measured	12.7%	Only Gemini 3 Flash Preview measured
Neither model has a result on the other 17 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01

Intelligence benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
AA Intelligence Index	16.9	26.3	Gemini 3 Flash Preview
Epoch Capabilities Index	142.2	Not measured	Only Claude Haiku 4.5 measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index07

Agentic work benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
AA Agentic Index	8.0	Not measured	Only Claude Haiku 4.5 measured
Design Arena: agents building web apps	Not measured	1111	Only Gemini 3 Flash Preview measured
Design Arena: agents building full-stack apps	Not measured	1063	Only Gemini 3 Flash Preview measured
Design Arena: agents building mobile apps	Not measured	1090	Only Gemini 3 Flash Preview measured
Design Arena: agents building Android apps	Not measured	1051	Only Gemini 3 Flash Preview measured
Design Arena: agents building Godot games	Not measured	1161	Only Gemini 3 Flash Preview measured
Design Arena: PowerPoint slides	Not measured	1036	Only Gemini 3 Flash Preview measured
LiveBench research	42.2%	Not measured	Only Claude Haiku 4.5 measured
LiveBench browser	40.0%	Not measured	Only Claude Haiku 4.5 measured
LiveBench long agentic	11.1%	Not measured	Only Claude Haiku 4.5 measured
Finance Agent (Vals AI)	31.0%	42.5%	Gemini 3 Flash Preview
Tax Agent Bench (Vals AI)	5.9%	11.8%	Gemini 3 Flash Preview
Legal Research Bench (Vals AI)	10.6%	18.3%	Gemini 3 Flash Preview
Excel Modeling Benchmark (Vals AI)	22.7%	26.0%	Gemini 3 Flash Preview
τ²-Bench Telecom	Not measured	80.4%	Only Gemini 3 Flash Preview measured
BALROG	31.2%	48.1%	Gemini 3 Flash Preview
DeepResearch Bench	45.5%	49.8%	Gemini 3 Flash Preview
Vending-Bench 2	$459	$3,635	Gemini 3 Flash Preview
Berkeley Function Calling Leaderboard (BFCL)	68.7%	Not measured	Only Claude Haiku 4.5 measured
Neither model has a result on the other 22 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index06

Reasoning benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
GPQA Diamond	72.2%	87.9%	Gemini 3 Flash Preview
LiveBench reasoning	61.7%	Not measured	Only Claude Haiku 4.5 measured
MMMU Pro (Vals AI)	46.1%	87.6%	Gemini 3 Flash Preview
GPQA Diamond (Artificial Analysis run)	Not measured	89.8%	Only Gemini 3 Flash Preview measured
Humanity's Last Exam (Artificial Analysis run)	Not measured	36.6%	Only Gemini 3 Flash Preview measured
GPQA Diamond (Epoch AI run)	71.2%	89.4%	Gemini 3 Flash Preview
ARC-AGI	47.7%	84.7%	Gemini 3 Flash Preview
ARC-AGI-2	4.0%	33.6%	Gemini 3 Flash Preview
SimpleBench	Not measured	61.1%	Only Gemini 3 Flash Preview measured
Chess puzzles	8.0%	39.0%	Gemini 3 Flash Preview
Mystery game puzzles	Not measured	26.0%	Only Gemini 3 Flash Preview measured
VPCT	Not measured	72.6%	Only Gemini 3 Flash Preview measured
LMArena Text: hard prompts	1421	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: expert	1443	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: hard prompts in English	1435	Not measured	Only Claude Haiku 4.5 measured
Neither model has a result on the other 7 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index03

Math benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
AIME	82.7%	95.6%	Gemini 3 Flash Preview
MGSM (Vals AI)	92.2%	93.3%	Gemini 3 Flash Preview
AA Math Index	Not measured	97.0	Only Gemini 3 Flash Preview measured
AIME 2025 (Artificial Analysis run)	Not measured	97.0%	Only Gemini 3 Flash Preview measured
OTIS Mock AIME	66.7%	95.6%	Gemini 3 Flash Preview
FrontierMath, tiers 1 to 3	Not measured	51.2%	Only Gemini 3 Flash Preview measured
FrontierMath, tier 4	Not measured	17.1%	Only Gemini 3 Flash Preview measured
ProofBench	Not measured	15.0%	Only Gemini 3 Flash Preview measured
MATH level 5	96.4%	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: math	1398	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: mathematical work	1430	Not measured	Only Claude Haiku 4.5 measured
Neither model has a result on the other 2 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index18

Knowledge benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
MMLU Pro	78.7%	88.6%	Gemini 3 Flash Preview
LegalBench (Vals AI)	81.2%	86.9%	Gemini 3 Flash Preview
CaseLaw (Vals AI)	56.5%	55.8%	Claude Haiku 4.5
CorpFin (Vals AI)	60.6%	66.4%	Gemini 3 Flash Preview
TaxEval (Vals AI)	67.5%	73.9%	Gemini 3 Flash Preview
MortgageTax (Vals AI)	62.2%	68.7%	Gemini 3 Flash Preview
MedQA (Vals AI)	79.6%	95.8%	Gemini 3 Flash Preview
MedCode (Vals AI)	32.7%	55.9%	Gemini 3 Flash Preview
MMLU Pro (Artificial Analysis run)	Not measured	89.0%	Only Gemini 3 Flash Preview measured
SimpleQA Verified	13.2%	66.8%	Gemini 3 Flash Preview
GeoBench	Not measured	88.0%	Only Gemini 3 Flash Preview measured
LMArena Text: science	1406	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: medicine and healthcare	1394	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: legal and government	1400	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: business and finance	1400	Not measured	Only Claude Haiku 4.5 measured
FACTS Benchmark Suite	Not measured	63.4%	Only Gemini 3 Flash Preview measured
Neither model has a result on the other 2 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index04

Web design benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
Design Arena: websites	1122	1196	Gemini 3 Flash Preview
Design Arena: UI components	1097	Not measured	Only Claude Haiku 4.5 measured
Design Arena: game dev	1097	1166	Gemini 3 Flash Preview
Design Arena: data viz	1124	Not measured	Only Claude Haiku 4.5 measured
Design Arena: 3D	1071	1183	Gemini 3 Flash Preview
Design Arena: all code categories	1114	1189	Gemini 3 Flash Preview
Design Arena: SVG	1025	Not measured	Only Claude Haiku 4.5 measured
Design Arena: ASCII art	1140	Not measured	Only Claude Haiku 4.5 measured
LiveBench design	59.9%	Not measured	Only Claude Haiku 4.5 measured

GeneralLike-for-likePublic boards, shown as published, kept out of the index14

General benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
LiveBench data analysis	59.3%	Not measured	Only Claude Haiku 4.5 measured
Public Benefits Bench (Vals AI)	54.3%	Not measured	Only Claude Haiku 4.5 measured
SAGE (Vals AI)	31.8%	51.8%	Gemini 3 Flash Preview
MedScribe (Vals AI)	85.2%	69.9%	Claude Haiku 4.5
Vals Multimodal Index	42.9%	52.2%	Gemini 3 Flash Preview
IFBench	Not measured	78.0%	Only Gemini 3 Flash Preview measured
Long context reasoning (AA-LCR)	Not measured	78.0%	Only Gemini 3 Flash Preview measured
DTBench	73.6%	89.1%	Gemini 3 Flash Preview
LMCA	30.9%	43.1%	Gemini 3 Flash Preview
ExploitBench	13.7%	Not measured	Only Claude Haiku 4.5 measured
LMArena Text	1397	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: instruction following	1414	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: creative writing	1371	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: English	1414	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: non-English	1377	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: Chinese	1418	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: German	1374	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: Japanese	1338	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: Korean	1346	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: French	1411	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: Spanish	1421	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: Russian	1381	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: Polish	1343	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: multi-turn	1409	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: longer queries	1427	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: writing and language	1386	Not measured	Only Claude Haiku 4.5 measured
LMArena Text: entertainment and media	1369	Not measured	Only Claude Haiku 4.5 measured
LMArena Document	1420	Not measured	Only Claude Haiku 4.5 measured
Neither model has a result on the other 18 boards here

Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared

Image generation benchmarks for Claude Haiku 4.5 and Gemini 3 Flash Preview
Benchmark	Claude Haiku 4.5	Gemini 3 Flash Preview	Leader
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

Claude Haiku 4.5$0.0035Fits in one request

Gemini 3 Flash Preview$0.0020Fits in one request

Gemini 3 Flash Preview costs less

Repository review

50K input + 3K output tokens

Claude Haiku 4.5$0.065Fits in one request

Gemini 3 Flash Preview$0.034Fits in one request

Gemini 3 Flash Preview costs less

Agent loop

200K input + 10K output tokens

Claude Haiku 4.5$0.250Exceeds the context window

Gemini 3 Flash Preview$0.130Fits in one request

Gemini 3 Flash 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 Claude Haiku 4.5 and Gemini 3 Flash Preview
Specification	Anthropic Claude Haiku 4.5	Google Gemini 3 Flash Preview
Maker	Anthropic	Google
Weights	No public weights listed	No public weights listed
Released	October 15, 2025	December 17, 2025
Context window	200K	1.05M
Input $/Mtok	$1.00	$0.50
Output $/Mtok	$5.00	$3.00
Coding index	35.6	43.7
Independent measurements behind it	4	2
Cost per solved task	$0.56	$0.37
Source	OpenRouter listing	OpenRouter listing

Questions

Is Claude Haiku 4.5 better than Gemini 3 Flash Preview for coding?

Pick Gemini 3 Flash Preview for coding: it scores 43.7 on the Vibe Coding Index against 35.6 for Claude Haiku 4.5, though on 2 benchmarks against 4. Pick Claude Haiku 4.5 for work measured by Code migration (Vals AI) or CaseLaw (Vals AI), where it leads.

Which is cheaper, Claude Haiku 4.5 or Gemini 3 Flash Preview?

Claude Haiku 4.5 costs $1.00 per million input tokens and $5.00 per million output tokens; Gemini 3 Flash Preview costs $0.50 and $3.00. Per solved SWE-bench Verified task, Claude Haiku 4.5 costs $0.56 and Gemini 3 Flash Preview $0.37.

Which has the bigger context window, Claude Haiku 4.5 or Gemini 3 Flash Preview?

Gemini 3 Flash Preview, with 1.05M tokens against 200K.

How many benchmarks is the Claude Haiku 4.5 vs Gemini 3 Flash Preview comparison based on?

44 benchmarks have a result for both models as of October 22, 2026. Claude Haiku 4.5's coding index rests on 4 independent benchmarks and Gemini 3 Flash Preview's on 2. Where only one model has a result, the page says so instead of naming a winner.

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Claude Haiku 4.5 or Gemini 3 Flash Preview: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Math

Knowledge

Web design

Long documents

Everyday cost

Cost per solved task

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

Compare next