Model Comparison
GPT-5 High vs Claude Haiku 4.5
GPT-5 High significantly outperforms across most benchmarks. Claude Haiku 4.5 is 1.7x cheaper per token.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5 High outperforms in 2 benchmarks (AIME 2025, GPQA), while Claude Haiku 4.5 is better at 0 benchmarks.
GPT-5 High significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5 High ($1.25/1M tokens) is 1.3x more expensive than Claude Haiku 4.5 ($1.00/1M tokens).
For output processing, GPT-5 High ($10.00/1M tokens) is 2.0x more expensive than Claude Haiku 4.5 ($5.00/1M tokens).
In conclusion, GPT-5 High is more expensive than Claude Haiku 4.5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5 High accepts 400,000 input tokens compared to Claude Haiku 4.5's 200,000 tokens. GPT-5 High can generate longer responses up to 128,000 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5 High and Claude Haiku 4.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5 High
Claude Haiku 4.5
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-5 High was released on 2025-08-07, while Claude Haiku 4.5 was released on 2025-10-15.
Claude Haiku 4.5 is 2 months newer than GPT-5 High.
Aug 7, 2025
8 months ago
Oct 15, 2025
6 months ago
2mo newerKnowledge Cutoff
When training data ends
GPT-5 High has a knowledge cutoff of 2024-09-30, 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 GPT-5 High (2024-09-30).
Sep 2024
Feb 2025
5 mo newerProvider Availability
GPT-5 High is available from OpenAI. Claude Haiku 4.5 is available from Anthropic.
GPT-5 High
Claude Haiku 4.5
Outputs Comparison
Key Takeaways
GPT-5 High
View detailsOpenAI
Claude Haiku 4.5
View detailsAnthropic
Detailed Comparison
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FAQ
Common questions about GPT-5 High vs Claude Haiku 4.5