Google · Workhorse

Gemini 3.5 Flash API pricing and specs

The Flash model that Gemini 3.8 Flash replaced at the top, now listed by Google as legacy.

Input

⁨$1.50⁩

Cached input

⁨$0.15⁩

Output

⁨$9⁩

US dollars per million tokens, standard tier, short-prompt rate

Until the end of 2026 it costs more than Gemini 3.8 Flash, which is on an introductory price, so there is little reason to start a new project on it.

Spec sheet

API model string: gemini-3.5-flash
Provider: Google
Context: 1.05M tokens
Max output: 66K tokens
Released: May 19, 2026
Batch API: 50% off, results within hours
Documented agent features: Tool callingStructured outputComputer useBuilt-in web searchAdjustable reasoning

What a task costs

Four reference workloads priced at this model's list rates, with caching applied after the first call. Your numbers will differ; the calculator lets you change every assumption.

Workload	Per task	Per 1,000 tasks
Support bot 4 calls, short tool lookups	⁨$0.046⁩	⁨$46⁩
Coding agent 30 calls, files and test output	⁨$1.54⁩	⁨$1,537⁩
Browser agent 25 calls, screenshots and page text	⁨$1.06⁩	⁨$1,062⁩
Research agent 15 calls, long search results	⁨$1.03⁩	⁨$1,026⁩