Google: Gemini 3.5 Flash

google/gemini-3.5-flash · GoogleNot yet established

Declared family: Gemini
Evidence confidence: Unknown
Declared tokenizer tag: Gemini
Entered catalogue: 19 May 2026
Last tested: Not yet measured
Measurement: Awaiting measurement

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	Identical contract to 2 other entries	api_40858f91
Context and output	1,048,576 context · 65,536 max output	declared
Reasoning contract	Mandatory · efforts high, medium, low, minimal · default medium	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed. It is highly optimized for coding proficiency and parallel agentic execution...

Modalities: text+image+file+audio+video->text
Declared tokenizer: Gemini
Prompt price: $1.50 / M tokens
Completion price: $9.00 / M tokens

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_p

defaults: {"temperature":null,"top_p":null,"top_k":null,"frequency_penalty":null,"presence_penalty":null,"repetition_penalty":null}

Catalogue entry

History

Every observation, kept as taken

19 May 2026Enters the OpenRouter catalogue declared as Gemini.

Cite this page as the evidence record for Google: Gemini 3.5 Flash: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings. The raw data behind every figure is on the data page.