o3-mini vs Claude Haiku 4.5 Comparison

Comparing o3-mini and Claude Haiku 4.5 across benchmarks, pricing, and capabilities.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

o3-mini outperforms in 1 benchmarks (GPQA), while Claude Haiku 4.5 is better at 1 benchmark (SWE-Bench Verified).

Both models are evenly matched across the benchmarks.

Sun Mar 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o3-mini costs less

For input processing, o3-mini ($1.10/1M tokens) is 1.1x more expensive than Claude Haiku 4.5 ($1.00/1M tokens).

For output processing, o3-mini ($4.40/1M tokens) is 1.1x cheaper than Claude Haiku 4.5 ($5.00/1M tokens).

In conclusion, Claude Haiku 4.5 is more expensive than o3-mini.*

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

Lowest available price from all providers

Sun Mar 15 2026 • llm-stats.com

o3-mini

Input tokens$1.10

Output tokens$4.40

Best providerAzure

Claude Haiku 4.5

Input tokens$1.00

Output tokens$5.00

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. o3-mini can generate longer responses up to 100,000 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.

o3-mini

Input200,000 tokens

Output100,000 tokens

Claude Haiku 4.5

Input200,000 tokens

Output64,000 tokens

Sun Mar 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Haiku 4.5 supports multimodal inputs, whereas o3-mini does not.

Claude Haiku 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

o3-mini

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.

o3-mini

Proprietary

Closed source

Claude Haiku 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

o3-mini was released on 2025-01-30, while Claude Haiku 4.5 was released on 2025-10-15.

Claude Haiku 4.5 is 9 months newer than o3-mini.

o3-mini

Jan 30, 2025

1.1 years ago

Claude Haiku 4.5

Oct 15, 2025

5 months ago

8mo newer

Knowledge Cutoff

When training data ends

o3-mini has a knowledge cutoff of 2023-09-30, while Claude Haiku 4.5 has a cutoff of 2025-02-01.

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 o3-mini (2023-09-30).

o3-mini

Sep 2023

Claude Haiku 4.5

Feb 2025

1.4 yr newer

Provider Availability

o3-mini is available from Azure, OpenAI. Claude Haiku 4.5 is available from Anthropic. The availability of providers can affect quality of the model and reliability.