Model Comparison

GPT-4o vs Claude Haiku 4.5

Claude Haiku 4.5 significantly outperforms across most benchmarks. Claude Haiku 4.5 is 2.2x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

GPT-4o outperforms in 0 benchmarks, while Claude Haiku 4.5 is better at 6 benchmarks (GPQA, MMMLU, SWE-Bench Verified, Tau2 Airline, Tau2 Retail, Tau2 Telecom).

Claude Haiku 4.5 significantly outperforms across most benchmarks.

Sun May 10 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, GPT-4o ($2.50/1M tokens) is 2.5x more expensive than Claude Haiku 4.5 ($1.00/1M tokens).

For output processing, GPT-4o ($10.00/1M tokens) is 2.0x more expensive than Claude Haiku 4.5 ($5.00/1M tokens).

In conclusion, GPT-4o is more expensive than Claude Haiku 4.5.*

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

Lowest available price from all providers
Sun May 10 2026 • llm-stats.com
OpenAI
GPT-4o
Input tokens$2.50
Output tokens$10.00
Best providerAzure
Anthropic
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

Claude Haiku 4.5 accepts 200,000 input tokens compared to GPT-4o's 128,000 tokens. Claude Haiku 4.5 can generate longer responses up to 64,000 tokens, while GPT-4o is limited to 16,384 tokens.

OpenAI
GPT-4o
Input128,000 tokens
Output16,384 tokens
Anthropic
Claude Haiku 4.5
Input200,000 tokens
Output64,000 tokens
Sun May 10 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4o and Claude Haiku 4.5 support multimodal inputs.

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

GPT-4o

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.

GPT-4o

Proprietary

Closed source

Claude Haiku 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4o was released on 2024-08-06, while Claude Haiku 4.5 was released on 2025-10-15.

Claude Haiku 4.5 is 15 months newer than GPT-4o.

GPT-4o

Aug 6, 2024

1.8 years ago

Claude Haiku 4.5

Oct 15, 2025

6 months ago

1.2yr newer

Knowledge Cutoff

When training data ends

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

GPT-4o

—

Claude Haiku 4.5

Feb 2025

Provider Availability

GPT-4o is available from Azure, OpenAI. Claude Haiku 4.5 is available from Anthropic.

GPT-4o

azure logo
Azure
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M
openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

Claude Haiku 4.5

anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI

No standout differentiators in the data we have for this pair.

Anthropic
Larger context window (200,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (73.0% vs 70.1%)
Higher MMMLU score (83.0% vs 81.4%)
Higher SWE-Bench Verified score (73.3% vs 33.2%)
Higher Tau2 Airline score (63.6% vs 45.5%)
Higher Tau2 Retail score (83.2% vs 63.4%)
Higher Tau2 Telecom score (83.0% vs 23.5%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o
Anthropic
Claude Haiku 4.5

FAQ

Common questions about GPT-4o vs Claude Haiku 4.5.

Which is better, GPT-4o or Claude Haiku 4.5?

Claude Haiku 4.5 significantly outperforms across most benchmarks. GPT-4o is made by OpenAI and Claude Haiku 4.5 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4o compare to Claude Haiku 4.5 in benchmarks?

GPT-4o scores AI2D: 94.2%, DocVQA: 92.8%, ChartQA: 85.7%, MMLU: 85.7%, CharXiv-D: 85.3%. 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%.

Is GPT-4o cheaper than Claude Haiku 4.5?

Claude Haiku 4.5 is 2.5x cheaper for input tokens. GPT-4o costs $2.50/M input and $10.00/M output via azure. Claude Haiku 4.5 costs $1.00/M input and $5.00/M output via anthropic.

What are the context window sizes for GPT-4o and Claude Haiku 4.5?

GPT-4o supports 128K tokens and Claude Haiku 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 GPT-4o and Claude Haiku 4.5?

Key differences include context window (128K vs 200K), input pricing ($2.50 vs $1.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-4o and Claude Haiku 4.5?

GPT-4o is developed by OpenAI and Claude Haiku 4.5 is developed by Anthropic.