Comprehensive side-by-side LLM comparison
GPT-5 leads with 3.9% higher average benchmark score. GPT-5 offers 128.0K more tokens in context window than Claude Haiku 4.5. Claude Haiku 4.5 is $5.25 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
Anthropic
Claude Haiku 4.5 continues Anthropic's tradition of fast, efficient models in the fourth generation Claude family. Designed to maintain the hallmark speed and cost-effectiveness of the Haiku line while incorporating advancements from the Claude 4 series, it serves applications requiring rapid processing and quick turnaround times.
OpenAI
GPT-5 represents the next generation of OpenAI's foundational models, developed to advance the frontier of AI capabilities in reasoning, knowledge, and general intelligence. Built to push beyond the limitations of GPT-4, it incorporates architectural and training improvements designed to enhance performance across diverse tasks and domains.
2 months newer

GPT-5
OpenAI
2025-08-07

Claude Haiku 4.5
Anthropic
2025-10-15
Cost per million tokens (USD)

Claude Haiku 4.5

GPT-5
Context window and performance specifications
Average performance across 6 common benchmarks

Claude Haiku 4.5

GPT-5
Performance comparison across key benchmark categories

Claude Haiku 4.5

GPT-5
GPT-5
2024-09-30
Claude Haiku 4.5
2025-02-01
Available providers and their performance metrics

Claude Haiku 4.5
Anthropic

GPT-5

Claude Haiku 4.5

GPT-5

Claude Haiku 4.5

GPT-5
OpenAI
ZeroEval