AnthropicLLM matchup

Claude Haiku 5.5vs.Claude Haiku 4.5

What has improved?

Claude Haiku 5.5 performs better than Claude Haiku 4.5 and is cheaper: Claude Haiku 4.5 costs 10 times as much.

Haiku 5.5 ahead

IntelligenceOverall index, 100 points = average

103.4

Claude Haiku 5.5

Rank 20

53.7

Claude Haiku 4.5

Rank 79

Haiku 5.5 faster

SpeedTokens per second

236

Claude Haiku 5.5

Claude Haiku 4.5

Haiku 5.5 cheaper

Price$ per 1M tokens

$0.20

Claude Haiku 5.5

Claude Haiku 4.5

Haiku 5.5 more popular

Popularity0 to 100

Claude Haiku 5.5

Rank 3 of 875

Claude Haiku 4.5

Rank 430 of 875

Above 100,000 tokens of context, Claude Haiku 5.5 costs more: $0.50 input and $2.50 output per 1M tokens.

Choose Claude Haiku 5.5 for

CodingGeneralReasoningFinanceAgentsProductivityKnowledge

Choose Claude Haiku 4.5 for

No clear advantage

Where is the difference?

Strengths at a glance

Haiku 5.5Haiku 4.5

The median of all ranked models is below 100 in every area, so it sits in the centre of the net.

CodingHaiku 5.5 ahead

Haiku 5.5106.2Rank 18

Haiku 4.548.9Rank 96

Median of ranked models83.7

95 % range: Haiku 5.5 102.5 to 109.9, Haiku 4.5 38.6 to 59.3.

AreaHaiku 5.5Haiku 4.5

The same values and verdicts as the bars below. In the top field the net starts at 100 points, the reference group average; values below sit as a hollow point in the centre. Not in the net because a model has no own value there or the data are too thin: Mathematics, Multimodal, Legal, Health.

Haiku 5.5 is ahead in 6 of 9 areas, Haiku 4.5 in none.

Haiku 5.5 ahead: 6too little data: 3

Areas in the overall index

CodingHaiku 5.5 +57106.2 to 48.9

GeneralHaiku 5.5 +54106.4 to 52.1

ReasoningHaiku 5.5 +53105.2 to 52.3

AgentsHaiku 5.5 +46106.1 to 60.1

KnowledgeHaiku 5.5 +2585.5 to 60.2

Mathematicsonly Haiku 5.5 has a score

Specialist fields

FinanceHaiku 5.5 +47104.7 to 58.0

Legalonly Haiku 5.5 has a score

Healthonly Haiku 5.5 has a score

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Show 3 more areas that do not count toward the overall index

ProductivityHaiku 5.5 +43101.8 to 58.8

Cybersecurityonly Haiku 5.5 has a score

Educationonly Haiku 5.5 has a score

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Which model for which task?

Everyday tasks, translated from the area values above. Each row names the values it rests on.

TaskBetter choicebased on

Writing and debugging codeHaiku 5.5Coding 106.2 to 48.9

Maths and data analysisHaiku 5.5Mathematics without a score for Haiku 4.5, Reasoning 105.2 to 52.3

Facts and researchHaiku 5.5Knowledge 85.5 to 60.2

Agents and workflowsHaiku 5.5Agents 106.1 to 60.1

Fast chat repliesHaiku 5.5236 to 97 tokens per second

Security analysisopenCybersecurity without a score for Haiku 4.5

Many requests on a small budgetHaiku 5.5$0.20 to $2 per 1M tokens

Finance, legal and medical textsHaiku 5.5Finance 104.7 to 58.0, Legal without a score for Haiku 4.5, Health without a score for Haiku 4.5

See for yourself: same task, one attempt

SVG short test

One SVG task with the same fixed settings for every model, without hidden thinking.

Prompt

Return only one standalone SVG of a pelican riding a bicycle. Use viewBox="0 0 800 600", simple shapes, two clearly visible wheels and a recognizable pelican with a long beak. At most 30 SVG elements and 1800 characters. No Markdown, explanations, comments, scripts, animation, CSS or external resources.

Claude Haiku 5.5

Unavailable in this round

Claude Haiku 4.5

Earlier tests

Pelican on a bicycle

Prompt

Generate an SVG of a pelican riding a bicycle

Task origin: Simon Willison

Claude Haiku 5.5

Not tested yet

Claude Haiku 4.5

Oct 1, 2026 · 10 s · $0.0080

Test details

Run date: Oct 1, 2026
API provider: openrouter
Requested API model: anthropic/claude-haiku-4.5
Reasoning setting: high
Token limit including reasoning: 8,192 tokens
Output tokens: 1,585 tokens
Cost of the attempt: $0.0080
Response time: 10.1 s
API model reported in response: anthropic/claude-haiku-4.5
Pinned endpoint: Anthropic | anthropic/claude-4.5-haiku-20251001
Temperature: Provider default
Test protocol: community-visual-tests-v1
Technical checks: Passed, not a quality rating

Visually reviewed. This individual test does not establish overall model quality.

Claude Haiku 5.5 and Claude Haiku 4.5 in the overall index

Every model with a place in the overall index, both models of this matchup highlighted. You can add or hide other models.

Overall index (Gradually Meta-Score v4)

20 of 91 models

4 models in this view are measured at a lower reasoning effort than max in the overall index. Dashed column: lower reasoning effort than the top.

Claude Opus 5.5max126.1

Gemini 4 Carbonhigh125.7

Claude Fable 5.1max123.8

Claude Sonnet 5.5max122.8

Gemini 4 Argonhigh122.3

GPT-6 Astramax121.3

GPT-6.1 Solmax119.2

Muse Wonder Fullmax118.3

Claude Opus 5max117.2

Muse Wondermax113.4

Kimi K3.1 Promax112.9

Claude Fable 5max112.5

GPT-6 Solmax110.6

GPT-5.6 Solmax108.7

Muse Spark 1.3max107.4

Gemini 3.7 Flashhigh107.1

DeepSeek V4.1 Flash 1017max106.6

Gemini 3.8 Flashhigh106.5

Claude Haiku 5.5max103.4

Claude Haiku 4.553.7

Claude Opus 5.5

Gemini 4 Carbon

Claude Fable 5.1

Claude Sonnet 5.5

Gemini 4 Argon

GPT-6 Astra

GPT-6.1 Sol

Muse Wonder Full

Claude Opus 5

Muse Wonder

Kimi K3.1 Pro

Claude Fable 5

GPT-6 Sol

GPT-5.6 Sol

Muse Spark 1.3

Gemini 3.7 Flash

DeepSeek V4.1 Flash 1017

Gemini 3.8 Flash

Claude Haiku 5.5

Claude Haiku 4.5

Popularity compared

How often the models are searched for, used and mentioned, on a scale from 0 to 100.

Claude Haiku 5.5 is more popular than Claude Haiku 4.5: 77 to 31 out of 100.

Over time

Weekly values from October 18, 2026 to November 5, 2026

Claude Haiku 5.5Claude Haiku 4.5

All data side by side

The better value is bold. For the overall index only when the gap is clear.

Metric	Claude Haiku 5.5	Claude Haiku 4.5
Intelligence
Overall indexpoints, 100 = reference group average, higher is better	103.4	53.7
Rank	Rank 20 of 91	Rank 79 of 91
Price per 1M tokens
Inputwhat you send	$0.10above 100,000 tokens: $0.50	$1
Outputwhat the model writes	$0.50above 100,000 tokens: $2.50	$5
Speed
Tokens per second	236	97
Popularity
Popularitysearch, usage and mentions, 0 to 100	77Rank 3 of 875	31Rank 430 of 875
Technical
Context windowhow much text the model reads at once	1 M tokens≈ 1,500 A4 pages	200,000 tokens≈ 300 A4 pages
Knowledge cutoff	June 2026	February 2025
Released	Oct 7, 2026	October 2025
Availability	Active	Active
Open weights	no	no

Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis

Is there a better choice?

Cheaper than Haiku 5.5MiMo V2.6 Flash

Overall index 98.3, rank 31. $0.14 input and $0.28 output per 1M tokens.

View profile

Best model in the overall indexClaude Opus 5.5

Overall index 126.1, rank 1. $4 input and $20 output per 1M tokens.

Haiku 5.5 vs. Claude Opus 5.5

Shared benchmarks

Single results from the same benchmark version, task and metric. A value is bold only with the same test setup and a clear gap.

A: Claude Haiku 5.5B: Claude Haiku 4.5

Public Benefits Bench v1.1Overall · higher is betterTest setup not documented as identical63.2%54.3%Vals AIAs of 10/12/2026

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