Current per-token rates
Gemini 2.5 Pro: $1.25/$10 (≤200K), $2.50/$15 (>200K). Gemini 2.5 Flash: $0.30/$2.50. Flash-Lite: $0.10/$0.40.
Long-context pricing tier
Pro doubles in price above 200K input tokens. Forecast with the higher rate if average prompts exceed 100K — a single long doc can flip the tier.
Context caching
Storage billed per hour per 1M tokens (~$1/hr at Pro tier). Cached reads at ~25% of standard. Worth it when the same context is reused 5+ times per hour.
Worked cost example
Doc-Q&A: 50K context + 300 output, 20K calls/month. Pro uncached ≈ $1,310. Flash ≈ $315. Flash-Lite ≈ $102.
When each tier fits
Pro: reasoning, multimodal, long-doc analysis. Flash: default for production. Flash-Lite: classification, extraction, and bulk pipelines where Flash overshoots on capability.

TokenAtlas