Claude’s “Best Yet” Model Released: Double the Speed, Half the Price, Coding Skills Near GPT‑5

Claude Haiku 4.5 — Anthropic’s Latest Small-Tier Model

Just moments ago, Anthropic announced Claude Haiku 4.5 — the newest member of the Claude model family.

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📌 Background: The Claude Model Tiers

Anthropic’s Claude models come in three parameter-scale tiers:

• Claude Opus — Large
• Claude Sonnet — Medium
• Claude Haiku — Small

The Haiku tier targets speed and affordability, while maintaining strong model capabilities.

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Key Highlights

• Near Sonnet 4 performance at 1/3 the price
• 2× faster execution for code generation and reasoning tasks
• SWE-bench Verified benchmark score: 73% — matching Claude Sonnet 4 and OpenAI GPT‑5
• In certain use cases (e.g., computer operation), Haiku 4.5 outperforms Sonnet 4
• Ideal for low-latency AI applications such as:
• Real-time chat assistants
• Customer service bots
• Pair programming tools

▲ SWE-bench Verified benchmark — real-world coding task performance

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Coding & Development Benefits

For developers using Claude Code, Haiku 4.5 offers:

• Faster multi-agent collaboration
• Rapid prototyping capabilities
• Responsiveness across the programming workflow

Its speed advantage makes it well-suited for agile coding scenarios.

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Synergy with Sonnet 4.5

A noteworthy pairing:

• Sonnet 4.5 can decompose complex problems into multiple sub-tasks
• Haiku 4.5 instances execute them in parallel
• Result: High coordination with lower cost

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Safety & Alignment

Anthropic’s internal tests show:

• Low undesirable behavior incidence
• Improved alignment vs. Haiku 3.5
• Even lower deviation than Sonnet 4.5 and Opus 4.1
• Currently the safest model Anthropic has produced

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Pricing Snapshot

• Haiku 4.5: $1 per million input tokens, $5 per million output tokens
• GPT‑5 mini / Gemini 2.5 Flash: ~$0.25 (input) / $2.5 (output) per million tokens
• Despite being ~4× costlier than GPT‑5 mini, Haiku 4.5 offers top-tier speed + coding capability
• 3× cheaper than Sonnet 4.5 with minimal performance sacrifice

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Known Weakness

• Math performance: May miscalculate results, even after being corrected
• Example: Uber bill sum test — identified all emails but repeatedly miscalculated totals

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Industry Feedback

Quoting Dan Shipper’s assessment:

> If you’re using Sonnet 4.5 for complex intelligent agents, Haiku lets you cut costs significantly with minimal performance loss.

> If you’re on Gemini 2.5 Flash or GPT‑5 mini, Haiku may outperform in situations requiring tool use & autonomous workflows, even at a slightly higher cost.

▲ Full blog: https://every.to/vibe-check/vibe-check-claude-haiku-4-5-anthropic-cooked

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Availability

Haiku 4.5 is available via:

• Claude API
• Amazon Bedrock
• Google Cloud Vertex AI

It replaces Haiku 3.5 and Sonnet 4 at Anthropic’s most competitive pricing tier.

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Speed Demo

Following @zb1992’s prompt recommendation:

• Clock demo with Haiku 4.5 delivered noticeably faster code generation
• Reasoning + calculation test further proved its speed advantage in lightweight model use cases

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Company Strategy — Beyond Coding Assistants

According to The Information:

• Anthropic’s valuation: up to $170B
• Plans:
• Acquire technical talent via small-scale deals (<$500M)
• Expand into developer tools like automated vulnerability testing & AI-assisted design
• Explore vertical-specific products in finance, healthcare, cybersecurity

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Integrating Haiku 4.5 with Content Monetization Platforms

Tools like AiToEarn官网 offer synergy:

• Open-source global AI content monetization
• AI-assisted multi-platform publishing: Douyin, Kwai, WeChat, Bilibili, Xiaohongshu, Facebook, Instagram, LinkedIn, Threads, YouTube, Pinterest, X (Twitter)
• Built-in analytics & AI model ranking: AI模型排名
• Ideal for creators leveraging Haiku 4.5’s speed for real-time global content

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Bottom Line

Claude Haiku 4.5 delivers:

• Near-flagship performance
• Significant cost savings
• Exceptional speed — perfect for real-time and parallelized workloads
• Best safety profile yet from Anthropic

In a competitive AI market, Haiku 4.5’s value proposition makes it a compelling choice for:

• Developers requiring agility
• Businesses balancing cost & capability
• Creators aiming for global reach with AI-powered workflows

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Do you want me to also create a side-by-side comparison table of Haiku 4.5 vs. Sonnet 4.5 vs. GPT‑5 mini for quick reference? That would make this Markdown even more reader-friendly.