GooglereasoningGemini 3.5 Flash pricing
$1.50 per 1M input tokens and $9.00 per 1M output tokens. In real work that is 1.6¢ per chat answer and 3.4¢ to summarize a 20-page PDF.
What Gemini 3.5 Flash costs per task
Token counts estimated from a measured model of the same lab (Gemini 3.1 Pro Preview), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 1.6¢$16.05 / 1,000 | 35 in · 915 out · 862 reasoning | 295 of 336 | estimated |
| Reply to a customer email | 0.73¢$7.29 / 1,000 | 271 in · 128 out · 637 reasoning | 293 of 336 | estimated |
| Write a 1,500-word blog post | 3.7¢$37.23 / 1,000 | 52 in · 2,522 out · 1,606 reasoning | 286 of 336 | estimated |
| Write 10 product descriptions | 2.9¢$29.36 / 1,000 | 293 in · 1,229 out · 1,984 reasoning | 283 of 336 | estimated |
| Translate 1,000 words | 8.1¢$81.40 / 1,000 | 1,308 in · 1,332 out · 7,494 reasoning | 311 of 336 | estimated |
| Proofread one page (500 words) | 2.7¢$26.84 / 1,000 | 706 in · 653 out · 2,211 reasoning | 305 of 336 | estimated |
| Summarize a 20-page PDF | 3.4¢$34.32 / 1,000 | 12,741 in · 611 out · 1,079 reasoning | 275 of 336 | estimated |
| Extract data from an invoice | 2.4¢$23.95 / 1,000 | 452 in · 533 out · 2,053 reasoning | 306 of 336 | estimated |
| Analyze a 200-row spreadsheet | 5.7¢$56.62 / 1,000 | 6,304 in · 882 out · 4,358 reasoning | 248 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 2.5¢$25.01 / 1,000 | 3,608 in · 599 out · 1,579 reasoning | 290 of 336 | estimated |
| Classify 100 support tickets | 7.1¢$70.74 / 1,000 | 1,397 in · 565 out · 7,062 reasoning | 318 of 336 | estimated |
| Review 500 lines of code | 8.5¢$85.43 / 1,000 | 5,207 in · 1,368 out · 7,256 reasoning | 284 of 336 | estimated |
| Write a SQL query | 2.4¢$23.63 / 1,000 | 135 in · 620 out · 1,983 reasoning | 303 of 336 | estimated |
| Run a 50-step coding agent | $1.46$1,462 / 1,000 | 2,194,987 in · 14,715 out · 99,150 reasoning | 258 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Gemini 3.5 Flash through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
Googleunknown | $0.75 / $4.50 | $0.075 | 1M | |
Google AI Studiounknown | $0.75 / $4.50 | $0.075 | 1M | 100% |
Googleunknown | $1.50 / $9.00 | $0.15 | 1M | 100% |
Google AI Studiounknown | $1.50 / $9.00 | $0.15 | 1M | 100% |
Googleunknown | $1.65 / $9.90 | $0.17 | 1M | |
Googleunknown | $2.70 / $16.20 | $0.27 | 1M | |
Google AI Studiounknown | $2.70 / $16.20 | $0.27 | 1M |
Price history
First seen in our price history on May 29, 2026 at $1.50 input / $9.00 output. The list price has not changed since.
FAQ
How much does Gemini 3.5 Flash cost?
Gemini 3.5 Flash costs $1.50 per 1 million input tokens and $9.00 per 1 million output tokens, with cached input at $0.15 (list price on Oct 18, 2026). In practice one chat answer costs about 1.6¢ and summarizing a 20-page PDF about 3.4¢.
Where is Gemini 3.5 Flash cheapest?
Among 7 providers we track, the lowest list price today is at Google: $0.75 input and $4.50 output per 1M tokens.
Does Gemini 3.5 Flash charge for reasoning tokens?
Yes. Reasoning (thinking) tokens are billed as output tokens. That is why the cost per task can be much higher than the visible answer suggests - our task costs include them.
Is the Gemini 3.5 Flash cost per task measured or estimated?
Estimated: Gemini 3.5 Flash was not run directly. Tokens come from Gemini 3.1 Pro Preview and are rescaled by the tokenizer of Google. Real usage can differ.