Model Comparison

Claude 3.5 Sonnet vs Claude Haiku 4.5

Claude Haiku 4.5 significantly outperforms across most benchmarks. Claude Haiku 4.5 is 3.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude 3.5 Sonnet outperforms in 0 benchmarks, while Claude Haiku 4.5 is better at 1 benchmark (GPQA).

Claude Haiku 4.5 significantly outperforms across most benchmarks.

Sat May 09 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Haiku 4.5 costs less

For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 3.0x more expensive than Claude Haiku 4.5 ($1.00/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 3.0x more expensive than Claude Haiku 4.5 ($5.00/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than Claude Haiku 4.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Sat May 09 2026 • llm-stats.com

Claude 3.5 Sonnet

Input tokens$3.00

Output tokens$15.00

Best providerAWS Bedrock

Claude Haiku 4.5

Input tokens$1.00

Output tokens$5.00

Best providerAnthropic

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Context Window

Maximum input and output token capacity

Both models have the same input context window of 200,000 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.

Claude 3.5 Sonnet

Input200,000 tokens

Output200,000 tokens

Claude Haiku 4.5

Input200,000 tokens

Output64,000 tokens

Sat May 09 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude 3.5 Sonnet and Claude Haiku 4.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude 3.5 Sonnet

Text

Images

Audio

Video

Claude Haiku 4.5

Text

Images

Audio

Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude 3.5 Sonnet

Proprietary

Closed source

Claude Haiku 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-06-21, while Claude Haiku 4.5 was released on 2025-10-15.

Claude Haiku 4.5 is 16 months newer than Claude 3.5 Sonnet.

Claude 3.5 Sonnet

Jun 21, 2024

1.9 years ago

Claude Haiku 4.5

Oct 15, 2025

6 months ago

1.3yr newer

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a documented knowledge cutoff of 2025-02-01, while Claude 3.5 Sonnet's cutoff date is not specified.

We can confirm Claude Haiku 4.5's training data extends to 2025-02-01, but cannot make a direct comparison without Claude 3.5 Sonnet's cutoff date.

Claude 3.5 Sonnet

—

Claude Haiku 4.5

Feb 2025

Provider Availability

Claude 3.5 Sonnet is available from Bedrock, Google. Claude Haiku 4.5 is available from Anthropic.

Claude 3.5 Sonnet

AWS Bedrock

Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Google

Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Claude Haiku 4.5

Anthropic

Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Claude 3.5 Sonnet

View details

Anthropic

No standout differentiators in the data we have for this pair.

Claude Haiku 4.5

View details

Anthropic

Less expensive input tokens

Less expensive output tokens

Higher GPQA score (73.0% vs 59.4%)

Claude 3.5 Sonnet

Claude Haiku 4.5

Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature	Claude 3.5 Sonnet	Claude Haiku 4.5

FAQ

Common questions about Claude 3.5 Sonnet vs Claude Haiku 4.5.

Which is better, Claude 3.5 Sonnet or Claude Haiku 4.5?

Claude Haiku 4.5 significantly outperforms across most benchmarks. Claude 3.5 Sonnet is made by Anthropic and Claude Haiku 4.5 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3.5 Sonnet compare to Claude Haiku 4.5 in benchmarks?

Claude 3.5 Sonnet scores GSM8k: 96.4%, BIG-Bench Hard: 93.1%, HumanEval: 92.0%, MGSM: 91.6%, MMLU: 90.4%. Claude Haiku 4.5 scores Tau2 Retail: 83.2%, MMMLU: 83.0%, Tau2 Telecom: 83.0%, AIME 2025: 80.7%, SWE-Bench Verified: 73.3%.

Is Claude 3.5 Sonnet cheaper than Claude Haiku 4.5?

Claude Haiku 4.5 is 3.0x cheaper for input tokens. Claude 3.5 Sonnet costs $3.00/M input and $15.00/M output via bedrock. Claude Haiku 4.5 costs $1.00/M input and $5.00/M output via anthropic.

What are the context window sizes for Claude 3.5 Sonnet and Claude Haiku 4.5?

Claude 3.5 Sonnet supports 200K tokens and Claude Haiku 4.5 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude 3.5 Sonnet and Claude Haiku 4.5?

Key differences include input pricing ($3.00 vs $1.00/M). See the full comparison above for benchmark-by-benchmark results.