Gemini 3.5 Flash API Pricing
Google · Mid-tier · Proprietary · released 2026-05. Prices in USD per 1 million tokens. Data snapshot: 2026-08-14.
- Input: $1.50 per 1M tokens
- Output: $9.00 per 1M tokens
- Batch API (input/output): $0.75 / $4.50
- Prompt-cache read: $0.15
- Context window: 1M
- Arena ELO: 1472 (as of 2026-08-13)
- Available on: Direct API, Google Vertex, OpenRouter (curated by hand — verify with the provider)
Cost per request by business use case
List price vs optimized (prompt caching on the cached input share, batch API for async workloads — only where the provider publishes those rates).
| Use case | Tokens (in/out) | Cost/req (list) | Cost/req (optimized) | Monthly @100K req |
|---|---|---|---|---|
| Support Ticket | 1,500 / 500 | $0.0068 | $0.0055 | $554 |
| Knowledge Q&A | 2,000 / 800 | $0.010 | $0.0083 | $831 |
| Meeting Summary | 10,000 / 1,200 | $0.026 | $0.012 | $1.2K |
| Marketing Content | 2,500 / 1,800 | $0.020 | $0.019 | $1.9K |
| Coding Task | 3,000 / 2,000 | $0.023 | $0.020 | $2.0K |
| Invoice Processing | 1,500 / 600 | $0.0076 | $0.0036 | $355 |
| Call Summary | 2,000 / 700 | $0.0093 | $0.0045 | $453 |
| Agent Workflow | 6,000 / 3,000 | $0.036 | $0.030 | $3.0K |
These are list prices — real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.