Claude Haiku 4.5 vs GPT-5.4

Pick two tools from the same category to compare side-by-side.

	Claude Haiku 4.5 Fast, cheap small model for classification, routing, high-volume work.	GPT-5.4 OpenAI's more affordable frontier model for coding and professional work, sitting below GPT-5.5.
Category	model	model
Vendor type	commercial	commercial
Pricing	usage	usage
Strengths	+ Lowest cost in Claude family + Low latency suitable for real-time interactions + Strong instruction-following for its size	+ Half the per-token price of GPT-5.5 while staying in the frontier coding/professional tier + 1M-token context window with up to 128K output tokens + mini variant targeted at subagent and computer-use workloads for high-volume agent fleets
Tradeoffs	− Weaker on complex reasoning vs Sonnet/Opus − Lower context window than Sonnet	− OpenAI directs complex reasoning and coding to GPT-5.5 instead − Older knowledge cutoff (Aug 31, 2025) than GPT-5.5
Used in stacks	4	0