Claude Haiku 4.5 vs Claude Opus 4.1 Comparison

Comparing Claude Haiku 4.5 and Claude Opus 4.1 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Claude Haiku 4.5 outperforms in 1 benchmarks (AIME 2025), while Claude Opus 4.1 is better at 5 benchmarks (GPQA, MMMLU, MMMU (validation), SWE-Bench Verified, Terminal-Bench).

Claude Opus 4.1 significantly outperforms across most benchmarks.

Tue Mar 17 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 15.0x cheaper than Claude Opus 4.1 ($15.00/1M tokens).

For output processing, Claude Haiku 4.5 ($5.00/1M tokens) is 15.0x cheaper than Claude Opus 4.1 ($75.00/1M tokens).

In conclusion, Claude Opus 4.1 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 Mar 17 2026 • llm-stats.com

Claude Haiku 4.5

Input tokens$1.00

Output tokens$5.00

Best providerAnthropic

Claude Opus 4.1

Input tokens$15.00

Output tokens$75.00

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 Haiku 4.5 can generate longer responses up to 64,000 tokens, while Claude Opus 4.1 is limited to 32,000 tokens.

Claude Haiku 4.5

Input200,000 tokens

Output64,000 tokens

Claude Opus 4.1

Input200,000 tokens

Output32,000 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Haiku 4.5 and Claude Opus 4.1 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 Opus 4.1

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 Opus 4.1

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Haiku 4.5 was released on 2025-10-15, while Claude Opus 4.1 was released on 2025-08-05.

Claude Haiku 4.5 is 2 months newer than Claude Opus 4.1.

Claude Haiku 4.5

Oct 15, 2025

5 months ago

2mo newer

Claude Opus 4.1

Aug 5, 2025

7 months ago

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a documented knowledge cutoff of 2025-02-01, while Claude Opus 4.1'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 Opus 4.1's cutoff date.

Claude Haiku 4.5

Feb 2025

Claude Opus 4.1

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Provider Availability

Claude Haiku 4.5 is available from Anthropic. Claude Opus 4.1 is available from Anthropic, Bedrock, Google. The availability of providers can affect quality of the model and reliability.