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The Domesday Book ofKWJ · AI

Gemini Flash 2.0 vs Claude Haiku 4.5

Flash 2.0 cheaper and handles video; Haiku better tool routing and refusal quality.

Gemini Flash 2.0
Google's workhorse: fast, cheap, multimodal. The Sonnet of the Gemini family.

Use this when

Ultra-high volume, video/multimodal at budget tier, Google Cloud integration.

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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

Tool routing, classification, sub-agent backbone, Anthropic ecosystem.

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Cost comparison

Flash $0.075/$0.30 per M; Haiku $1/$5 per M. Flash significantly cheaper.