Model Comparison

Claude Haiku 4.5 vs Claude Sonnet 4.5

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

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Claude Haiku 4.5 outperforms in 0 benchmarks, while Claude Sonnet 4.5 is better at 5 benchmarks (AIME 2025, GPQA, MMMLU, OSWorld, Terminal-Bench).

Claude Sonnet 4.5 significantly outperforms across most benchmarks.

Tue May 26 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 4.5 ($3.00/1M tokens).

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

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

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

Lowest available price from all providers

Tue May 26 2026 • llm-stats.com

Claude Haiku 4.5

Input tokens$1.00

Output tokens$5.00

Best providerAnthropic

Claude Sonnet 4.5

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.

Claude Haiku 4.5

Input200,000 tokens

Output64,000 tokens

Claude Sonnet 4.5

Input200,000 tokens

Output64,000 tokens

Tue May 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Haiku 4.5 and Claude Sonnet 4.5 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 4.5

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 Haiku 4.5

Proprietary

Closed source

Claude Sonnet 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Haiku 4.5 was released on 2025-10-15, while Claude Sonnet 4.5 was released on 2025-09-29.

Claude Haiku 4.5 is 1 month newer than Claude Sonnet 4.5.

Claude Haiku 4.5

Oct 15, 2025

7 months ago

2w newer

Claude Sonnet 4.5

Sep 29, 2025

7 months ago

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a knowledge cutoff of 2025-02-01, while Claude Sonnet 4.5 has a cutoff of 2025-01-31.

Claude Haiku 4.5 has more recent training data (up to 2025-02-01), making it potentially better informed about events through that date compared to Claude Sonnet 4.5 (2025-01-31).

Claude Haiku 4.5

Feb 2025

1 mo newer

Claude Sonnet 4.5

Jan 2025

Provider Availability

Claude Haiku 4.5 is available from Anthropic, Vertex AI. Claude Sonnet 4.5 is available from Anthropic.

Claude Haiku 4.5

Anthropic

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

Unknown Organization

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

Claude Sonnet 4.5

Anthropic

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

* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Claude Haiku 4.5

View details

Anthropic

Less expensive input tokens

Less expensive output tokens

Claude Sonnet 4.5

View details

Anthropic

Higher AIME 2025 score (87.0% vs 80.7%)

Higher GPQA score (83.4% vs 73.0%)

Higher MMMLU score (89.1% vs 83.0%)

Higher OSWorld score (61.4% vs 50.7%)

Higher Terminal-Bench score (50.0% vs 41.0%)

Detailed Comparison

AI Model Comparison Table
Feature	Claude Haiku 4.5	Claude Sonnet 4.5

FAQ

Common questions about Claude Haiku 4.5 vs Claude Sonnet 4.5.

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

Claude Sonnet 4.5 significantly outperforms across most benchmarks. Claude Haiku 4.5 is made by Anthropic and Claude Sonnet 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 Haiku 4.5 compare to Claude Sonnet 4.5 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 4.5 scores MMMLU: 89.1%, AIME 2025: 87.0%, TAU-bench Retail: 86.2%, GPQA: 83.4%, MMMUval: 77.8%.

Is Claude Haiku 4.5 cheaper than Claude Sonnet 4.5?

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 4.5 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 4.5?

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

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