Gemini 3.5 Flash API Pricing
Gemini 3.5 Flash was Google's GA model for sustained frontier performance on agentic and coding tasks, released May 19, 2026. Google deprecated it on October 8, 2026: API requests to gemini-3.5-flash are now routed to Gemini 3.6 Flash, and the model is gone from Google's pricing page. Its last published rates were $1.50/M input, $9.00/M output, and $0.15/M cached input.
Run the numbers.
Live calculator pre-loaded with Gemini 3.5 Flash standard rates. Google lists standard input at $1.50/M, output including thinking tokens at $9.00/M, and cached input at $0.15/M.
Real-world presets.
Repository iteration loop
Video + docs briefing
Search-grounded answer
Batch classification
This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| Gemini 3.5 Flash Current | $1.50 cache $0.15 | $9.00 | $1.08 agentic 92/8 | 1M | Newest GA Gemini agent model |
| Gemini 3.1 Pro Preview | $2.00 cache $0.20 | $12.00 | $1.44 +33% | 1M | Higher-ceiling preview reasoning |
| Gemini 3.1 Flash-Lite | $0.25 cache $0.025 | $1.50 | $0.18 deprecated · −6.0× | 1M | Low-latency high-volume tasks |
| Gemini 3 Flash Preview | $0.50 cache $0.05 | $3.00 | $0.361 −3.0× | 1M | Gemini 3 preview workloads |
Frequently asked.
Practical Gemini 3.5 Flash pricing questions, with standard, batch, flex, and priority tiers separated.
Q · 01 What is Gemini 3.5 Flash priced at? +
gemini-3.5-flash at $1.50/M input, $9.00/M output, and $0.15/M cached input. These were USD prices per 1M tokens on the paid Gemini API tier; the model left the pricing page when Google deprecated it on October 8, 2026.Q · 02 Can I still use Gemini 3.5 Flash? +
gemini-3.5-flash on October 8, 2026 and replaced it with Gemini 3.6 Flash. The endpoint is not shutting down, but API requests to it are routed automatically to gemini-3.6-flash, and the model can no longer be selected in Google AI Studio. Google asks developers to switch the model string to gemini-3.6-flash or gemini-3.8-flash, and does not say which rate a routed request is billed at.Q · 03 Does output pricing include thinking tokens? +
Output price (including thinking tokens), so this page treats generated thinking and answer tokens as output.Q · 04 How much do Batch and Flex cost? +
$0.75/M input, $4.50/M output, and $0.075/M cached input. Flex uses the same input/output rates, with cached input listed at $0.08/M.Q · 05 What about Priority pricing? +
$2.70/M input, $16.20/M output, and $0.27/M cached input.Q · 06 What context window does it support? +
1,048,576 and an output token limit of 65,536. AI//COST rounds that to a 1M context label.Q · 07 Is this a preview model? +
gemini-3.5-flash as the GA version on May 19, 2026. The older preview row remains separate as gemini-3-flash-preview.