Claude Haiku 4.5 vs GPT-4o: Budget Tier
Both excellent for high-volume classification. Haiku edges in tool routing; GPT-4o in voice.
Claude Haiku 4.5
The fast one. Used for sub-agents, high-volume classification, and the parts of an agent loop where capability matters less than throughput.
Use this when
Sub-agent routing, email classification, low-latency tool calls.
Full profile →GPT-4o
The omni model. Text, image, audio natively in one system. Speed doubled vs. GPT-4.
Use this when
Voice mode required, multimodal classification, OpenAI ecosystem.
Full profile →Cost comparison
Haiku $1/$5 per M. GPT-4o $2.50/$10 per M.