Google: Nano Banana 2 (Gemini 3.1 Flash Image)

google/gemini-3.1-flash-image · GoogleNot yet established

Declared family: Gemini
Evidence confidence: Unknown
Declared tokenizer tag: Gemini
Entered catalogue: 18 June 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	No other entry shares this exact contract	api_b8f53431
Context and output	131,072 context · 32,768 max output	declared
Reasoning contract	Optional · efforts high, minimal · default minimal	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

Gemini 3.1 Flash Image, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines advanced...

Modalities: text+image->text+image
Declared tokenizer: Gemini
Prompt price: $0.50 / M tokens
Completion price: $3.00 / M tokens

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetop_p

defaults: {}

Catalogue entry

History

Every observation, kept as taken

18 June 2026Enters the OpenRouter catalogue declared as Gemini.

Cite this page as the evidence record for Google: Nano Banana 2 (Gemini 3.1 Flash Image): 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.