Claude Haiku 4.5 vs GPT-5.5

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-5.5 OpenAI's flagship frontier model, positioned as a new class of intelligence for coding and professional work.
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	+ OpenAI's recommended model for complex reasoning and coding + 1M-token context window with up to 128K output tokens + Generally available via the OpenAI API with listed pricing of $5 input / $30 output per million tokens
Tradeoffs	− Weaker on complex reasoning vs Sonnet/Opus − Lower context window than Sonnet	− Most expensive tier in OpenAI's lineup; GPT-5.4 is positioned as the more affordable option for similar work − API-only commercial model; no open weights
Used in stacks	4	0