AI Desk · Model Identity · Compare
Google: Gemini 2.5 Flash · Google: Gemini 3.7 Flash
Identity similarity: lowDivergent fingerprints · 26/26These models tokenise differently. Divergence on the high-information strings (CJK, emoji, digits) separates unrelated vocabularies within a handful of samples.
Google: Gemini 2.5 Flash recordGoogle: Gemini 3.7 Flash recordOpen in the interactive bench
Tokenizer fingerprint
26 of 26 mutually clean strings agree| Test string | Google: Gemini 2.5 Flash | Google: Gemini 3.7 Flash | Verdict |
|---|---|---|---|
| en-prose | 14 | 14 | match |
| en-long | 16 | 16 | match |
| spaces-20 | 3 | 3 | match |
| spaces-60 | 4 | 4 | match |
| tabs-20 | 3 | 3 | match |
| newlines-20 | 3 | 3 | match |
| mixed-ws | 9 | 9 | match |
| digits-9 | 9 | 9 | match |
| digits-12 | 12 | 12 | match |
| digits-30 | 30 | 30 | match |
| digits-sep | 12 | 12 | match |
| float-long | 22 | 22 | match |
| zh-common | 10 | 10 | match |
| zh-long | 12 | 12 | match |
| zh-rare | 25 | 25 | match |
| ja-kana | 7 | 7 | match |
| ja-kanji | 9 | 9 | match |
| ko | 11 | 11 | match |
| ru | 12 | 12 | match |
| ar | 10 | 10 | match |
| he | 13 | 13 | match |
| hi | 8 | 8 | match |
| th | 10 | 10 | match |
| el | 13 | 13 | match |
| emoji-basic | 5 | 5 | match |
| emoji-skin | 10 | 10 | match |
| emoji-zwj-family | x | 7 | – |
| emoji-zwj-x3 | x | 21 | – |
| emoji-flags | x | 8 | – |
| emoji-prof | x | 11 | – |
| math | x | 26 | – |
| boxdraw | x | 17 | – |
| combining | x | 10 | – |
| cjk-ext-b | x | 16 | – |
| surrogates | x | 27 | – |
| zalgo | x | 22 | – |
| rtl-mix | x | 5 | – |
| py-code | x | 28 | – |
| py-indent | x | 18 | – |
| json | x | 28 | – |
| html | x | 14 | – |
| regex | x | 44 | – |
| camel | x | 6 | – |
| snake | x | 11 | – |
| rare-word-x5 | x | 25 | – |
| repeat-tok | x | 21 | – |
| base64 | x | 34 | – |
| hex | x | 16 | – |
| url | x | 23 | – |
| uuid | x | 36 | – |
Values are the marginal prompt-token cost of each string with the model's fixed overhead subtracted. An x marks a row excluded as corrupt for that model.
API surface
The declared serving contracts differ| Field | Google: Gemini 2.5 Flash | Google: Gemini 3.7 Flash | Verdict |
|---|---|---|---|
| Context length | 1048576 | 1048576 | ✓ match |
| Max output tokens | 65535 | 65536 | × differs |
| Supported parameters | include_reasoning, max_tokens, reasoning, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_p | include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_p | × differs |
| Defaults | {"temperature":null,"top_p":null,"top_k":null,"frequency_penalty":null,"presence_penalty":null,"repetition_penalty":null} | {} | × differs |
| Reasoning contract | {"mandatory":false} | {"mandatory":true,"default_enabled":true,"supported_efforts":["high","medium","low"],"default_effort":"medium"} | × differs |
| Modalities | text+image+file+audio+video->text | text+image+file+audio+video->text | ✓ match |
Method: tokenizer fingerprinting, v1, 50 strings. This page is static and dated; the interactive bench compares any two of the 453 catalogue models.