Model Comparison

o3-mini vs Claude 3.5 Haiku

o3-mini significantly outperforms across most benchmarks. Claude 3.5 Haiku is 1.2x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

o3-mini outperforms in 6 benchmarks (GPQA, MATH, MGSM, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail), while Claude 3.5 Haiku is better at 0 benchmarks.

o3-mini significantly outperforms across most benchmarks.

Sat May 23 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude 3.5 Haiku costs less

For input processing, o3-mini ($1.10/1M tokens) is 1.4x more expensive than Claude 3.5 Haiku ($0.80/1M tokens).

For output processing, o3-mini ($4.40/1M tokens) is 1.1x more expensive than Claude 3.5 Haiku ($4.00/1M tokens).

In conclusion, o3-mini is more expensive than Claude 3.5 Haiku.*

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

Lowest available price from all providers

Sat May 23 2026 • llm-stats.com

o3-mini

Input tokens$1.10

Output tokens$4.40

Best providerAzure

Claude 3.5 Haiku

Input tokens$0.80

Output tokens$4.00

Best providerAWS Bedrock

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. Claude 3.5 Haiku can generate longer responses up to 200,000 tokens, while o3-mini is limited to 100,000 tokens.

o3-mini

Input200,000 tokens

Output100,000 tokens

Claude 3.5 Haiku

Input200,000 tokens

Output200,000 tokens

Sat May 23 2026 • llm-stats.com

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 3.5 Haiku

Proprietary

Closed source

Release Timeline

When each model was launched

o3-mini was released on 2025-01-30, while Claude 3.5 Haiku was released on 2024-10-22.

o3-mini is 3 months newer than Claude 3.5 Haiku.

o3-mini

Jan 30, 2025

1.3 years ago

3mo newer

Claude 3.5 Haiku

Oct 22, 2024

1.6 years ago

Knowledge Cutoff

When training data ends

o3-mini has a documented knowledge cutoff of 2023-09-30, while Claude 3.5 Haiku's cutoff date is not specified.

We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without Claude 3.5 Haiku's cutoff date.

o3-mini

Sep 2023

Claude 3.5 Haiku

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Provider Availability

o3-mini is available from Azure, OpenAI. Claude 3.5 Haiku is available from Bedrock, Google, Anthropic.

o3-mini

Azure

Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M

OpenAI

Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M

Claude 3.5 Haiku

AWS Bedrock

Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M

Google

Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M

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

o3-mini

View details

OpenAI

Higher GPQA score (77.2% vs 41.6%)

Higher MATH score (97.9% vs 69.4%)

Higher MGSM score (92.0% vs 85.6%)

Higher SWE-Bench Verified score (49.3% vs 40.6%)

Higher TAU-bench Airline score (32.4% vs 22.8%)

Higher TAU-bench Retail score (57.6% vs 51.0%)

Claude 3.5 Haiku

View details

Anthropic

Less expensive input tokens

Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature	o3-mini	Claude 3.5 Haiku

FAQ

Common questions about o3-mini vs Claude 3.5 Haiku.

Which is better, o3-mini or Claude 3.5 Haiku?

o3-mini significantly outperforms across most benchmarks. o3-mini is made by OpenAI and Claude 3.5 Haiku is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o3-mini compare to Claude 3.5 Haiku in benchmarks?

o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%. Claude 3.5 Haiku scores HumanEval: 88.1%, MGSM: 85.6%, DROP: 83.1%, MATH: 69.4%, MMLU-Pro: 65.0%.

Is o3-mini cheaper than Claude 3.5 Haiku?

Claude 3.5 Haiku is 1.4x cheaper for input tokens. o3-mini costs $1.10/M input and $4.40/M output via azure. Claude 3.5 Haiku costs $0.80/M input and $4.00/M output via bedrock.

What are the context window sizes for o3-mini and Claude 3.5 Haiku?

o3-mini supports 200K tokens and Claude 3.5 Haiku 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 o3-mini and Claude 3.5 Haiku?

Key differences include input pricing ($1.10 vs $0.80/M). See the full comparison above for benchmark-by-benchmark results.

Who makes o3-mini and Claude 3.5 Haiku?

o3-mini is developed by OpenAI and Claude 3.5 Haiku is developed by Anthropic.