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Claude Haiku 5.5 matches Sonnet 5.5 on accuracy, beats it on speed and cost

By PulseAugur Editorial · [1 sources] ·

A recent test comparing Anthropic's Claude Haiku 5.5 and Claude Sonnet 5.5 found that Haiku 5.5 performed equally well on three specific office tasks, achieving a perfect score of 15/15. Haiku 5.5 was also faster, completing the tasks in 11.7 seconds compared to Sonnet 5.5's 15.7 seconds. Crucially, Haiku 5.5 was 18 times cheaper to use, costing $0.00129 per run versus $0.02357 for Sonnet 5.5. AI

IMPACT Offers a more cost-effective option for common office tasks without sacrificing accuracy or speed.

RANK_REASON Comparative analysis of two existing models with specific performance metrics. [lever_c_demoted from research: ic=1 ai=1.0]

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Claude Haiku 5.5 matches Sonnet 5.5 on accuracy, beats it on speed and cost

How we ranked this

Signal score
45 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Comparative analysis of two existing models with specific performance metrics. [lever_c_demoted from research: ic=1 ai=1.0]
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, model release
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
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High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · RanThis ·

    Claude Haiku vs Sonnet 5.5: 18x Cheaper and Just as Accurate in a Three-Task API Test

    <p><em>Originally published at <a href="https://ranthis.com/guides/claude-haiku-vs-sonnet?utm_source=devto&amp;utm_medium=crosspost&amp;utm_campaign=claude-haiku-vs-sonnet" rel="noopener noreferrer">ranthis.com</a>. The scripts and raw answers are in the <a href="https://github.c…

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