Model Comparison

Claude Haiku 4.5 vs Claude Sonnet 4

Claude Haiku 4.5 has a slight edge in benchmark performance. Claude Haiku 4.5 is 3.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Claude Haiku 4.5 outperforms in 3 benchmarks (AIME 2025, SWE-Bench Verified, Terminal-Bench), while Claude Sonnet 4 is better at 2 benchmarks (GPQA, MMMLU).

Claude Haiku 4.5 has a slight edge in benchmark performance.

Fri May 08 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 Haiku 4.5 ($1.00/1M tokens) is 3.0x cheaper than Claude Sonnet 4 ($3.00/1M tokens).

For output processing, Claude Haiku 4.5 ($5.00/1M tokens) is 3.0x cheaper than Claude Sonnet 4 ($15.00/1M tokens).

In conclusion, Claude Sonnet 4 is more expensive than Claude Haiku 4.5.*

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

Lowest available price from all providers
Fri May 08 2026 • llm-stats.com
Anthropic
Claude Haiku 4.5
Input tokens$1.00
Output tokens$5.00
Best providerAnthropic
Anthropic
Claude Sonnet 4
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 200,000 tokens. Both models can generate responses up to 64,000 tokens.

Anthropic
Claude Haiku 4.5
Input200,000 tokens
Output64,000 tokens
Anthropic
Claude Sonnet 4
Input200,000 tokens
Output64,000 tokens
Fri May 08 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Haiku 4.5 and Claude Sonnet 4 support multimodal inputs.

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

Claude Haiku 4.5

Text
Images
Audio
Video

Claude Sonnet 4

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 Haiku 4.5

Proprietary

Closed source

Claude Sonnet 4

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Haiku 4.5 was released on 2025-10-15, while Claude Sonnet 4 was released on 2025-05-22.

Claude Haiku 4.5 is 5 months newer than Claude Sonnet 4.

Claude Haiku 4.5

Oct 15, 2025

6 months ago

4mo newer
Claude Sonnet 4

May 22, 2025

11 months ago

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a documented knowledge cutoff of 2025-02-01, while Claude Sonnet 4'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 Sonnet 4's cutoff date.

Claude Haiku 4.5

Feb 2025

Claude Sonnet 4

—

Provider Availability

Claude Haiku 4.5 is available from Anthropic. Claude Sonnet 4 is available from Anthropic, Bedrock, Google.

Claude Haiku 4.5

anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

Claude Sonnet 4

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Less expensive input tokens
Less expensive output tokens
Higher AIME 2025 score (80.7% vs 70.5%)
Higher SWE-Bench Verified score (73.3% vs 72.7%)
Higher Terminal-Bench score (41.0% vs 35.5%)
Anthropic
Higher GPQA score (75.4% vs 73.0%)
Higher MMMLU score (86.5% vs 83.0%)
AnthropicClaude Haiku 4.5
AnthropicClaude Sonnet 4
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Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Haiku 4.5
Anthropic
Claude Sonnet 4

FAQ

Common questions about Claude Haiku 4.5 vs Claude Sonnet 4.

Which is better, Claude Haiku 4.5 or Claude Sonnet 4?

Claude Haiku 4.5 has a slight edge in benchmark performance. Claude Haiku 4.5 is made by Anthropic and Claude Sonnet 4 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Haiku 4.5 compare to Claude Sonnet 4 in benchmarks?

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%. Claude Sonnet 4 scores MMMLU: 86.5%, TAU-bench Retail: 80.5%, GPQA: 75.4%, MMMU: 74.4%, SWE-Bench Verified: 72.7%.

Is Claude Haiku 4.5 cheaper than Claude Sonnet 4?

Claude Haiku 4.5 is 3.0x cheaper for input tokens. Claude Haiku 4.5 costs $1.00/M input and $5.00/M output via anthropic. Claude Sonnet 4 costs $3.00/M input and $15.00/M output via anthropic.

What are the context window sizes for Claude Haiku 4.5 and Claude Sonnet 4?

Claude Haiku 4.5 supports 200K tokens and Claude Sonnet 4 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 Haiku 4.5 and Claude Sonnet 4?

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