AllocateGemini 3.5 Flash vs Claude Sonnet 5
On provider list prices, Gemini 3.5 Flash costs $1.50 per million input tokens against $3 for Claude Sonnet 5: 2.0x apart. Output is $9 against $15 (1.7x).
Gemini 3.5 Flash
Claude Sonnet 5Specifications and provider list prices from the Allocate catalog, checked 2026-07-21.
What the numbers say
Take 1,000,000 requests a month at 1,200 input and 350 output tokens each. That workload costs $4,950 a month on Gemini 3.5 Flash and $8,850 on Claude Sonnet 5 at list: a gap of $3,900, or 1.8x.
Choose Gemini 3.5 Flash for
- High-volume support and triage
- Document extraction at scale
- Vision and OCR pipelines
Choose Claude Sonnet 5 for
- Judgment calls with policy context
- Customer-facing writing
- Review and escalation flows
Common questions
Which is cheaper, Gemini 3.5 Flash or Claude Sonnet 5?
Gemini 3.5 Flash, on this workload shape. At list prices it is $1.50/$9 per million tokens in and out against $3/$15 for Claude Sonnet 5. Billed on Allocate: $1.60/$9.63 against $3.21/$16.05.
Which has the bigger context window?
They match: both read 1,000,000 tokens (1M) per request.
Can I fine-tune Gemini 3.5 Flash or Claude Sonnet 5?
No. Both are closed models served over API. If you want a model you can train and own, start from an open-weights base in the catalog.
Related comparisons
Run the numbers on your workload
Or don’t choose. On Allocate a route name is the contract: point yours at one model today, swap to the other tomorrow, and compare them on your live traffic with per-token metering.