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  1. Home
  2. Models
  3. Gemini 2.5 Flash Preview 05-20
Updated Jul 10, 2025
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Openings

How Gemini 2.5 Flash Preview 05-20 starts an answer

The first lines of every written answer it has on Rival. Formatting stripped, words untouched.

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

569 words
Alright, alright, settle down you magnificent collection of human beings! You look good tonight. Not just good, but… like you've all collectively decided to nail the 'I'm here to laugh and avoid talking about my Monday' look. And I respect that. Seriously though, it's great to be back on stage. I'm living the dream.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

79 words
Here are 5 jokes for you: Why don't scientists trust atoms? Because they make up everything! What do you call a fake noodle? An impasta! Why did the scarecrow win an award? Because he was outstanding in his field! I told my wife she was drawing her eyebrows too high. She looked surprised.
Read the full answer

Compare Gemini 2.5 Flash Preview 05-20

Gemini 2.5 Flash Preview 05-20 vs Gemini 3.1 Pro Preview11 shared prompts · Newer
Gemini 2.5 Flash Preview 05-20 vs Gemini 3.7 Flash11 shared prompts · Landed Aug 2026
Gemini 2.5 Flash Preview 05-20 vs Gemini 3.6 Flash11 shared prompts · Landed Jul 2026
Gemini 2.5 Flash Preview 05-20 vs Mercury 2.5 Preview11 shared prompts · Landed Sep 2026
Gemini 2.5 Flash Preview 05-20 vs Ox Alpha11 shared prompts · Landed Aug 2026
Gemini 2.5 Flash Preview 05-20 vs Nemotron 3.5 Lightning11 shared prompts · Landed Aug 2026
Gemini 2.5 Flash Preview 05-20 vs GPT-5.6 Luna11 shared prompts · Landed Jul 2026
Gemini 2.5 Flash Preview 05-20 vs GPT-5.6 Luna Pro11 shared prompts · Landed Jul 2026
Gemini 2.5 Flash Preview 05-20 vs Claude Opus 4.611 shared prompts · Premium
Gemini 2.5 Flash Preview 05-20 vs Qwen3.8 27B10 shared prompts · Landed Aug 2026
Gemini 2.5 Flash Preview 05-20 vs MiniMax M310 shared prompts · Landed Jun 2026
Gemini 2.5 Flash Preview 05-20 vs GPT-6 Astra11 shared prompts · Landed Sep 2026

Prompts Gemini 2.5 Flash Preview 05-20 answered

  • SVG Layout Challengeimage generation
  • World Map SVGimage generation
  • Gravitational Waves Animationweb design
  • Pokémon Battle UI Recreationweb design
  • Retro macOS UI Recreationweb design
  • Generate a Stand-Up Routineconversation

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Gemini 2.5 Flash Preview 05-20

Gemini 2.5 Flash Preview 05-20

Gemini:
Pro 1.0 logoPro 1.0
1.5 Pro logo1.5 Pro
2.0 Flash Thinking logo2.0 Flash Thinking
2.0 Pro Experimental logo2.0 Pro Experimental
2.5 Pro Experimental logo2.5 Pro Experimental
2.5 Flash Preview 05-20 logo2.5 Flash Preview 05-20

The May 20 checkpoint of Gemini 2.5 Flash in its non-thinking form: it will not emit reasoning tokens, and is billed at the lower output rate. The paired :thinking variant is the one that reasons before answering.

WebsiteOpenRouterDocsBlog
Provider
Google AI
Released
2025-05-20
Parameters
Not disclosed
Free API (OpenRouter)
No
Per 1M tokens
$0.15 in · $0.60 out
Estimated tab
~$0.016
Visible-output estimate. Thinking may cost extra.

Free API availability

No free endpoint for Gemini 2.5 Flash Preview 05-20 was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 16 Sep 2026 · OpenRouter usage limits

View API options↗
Get API accessProvider and language code samples
Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"google/gemini-2.5-flash-preview-05-20"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Also on Google Vertex AI

Deep analysisPsychometrics, taste index, writing DNA
SubjectiveBench

Taste Index

Across 10 scored outputs
How this is measured →
180.18xFloor
0100headroom →

Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.

Craft27
Originality11
Plays it safe
share of outputs that are the default answer
90%
Writing DNA

Stylometric Fingerprint

Based on 2 text responses
Tick = global average
Vocabulary Diversity69%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length9.9 words

Average words per sentence.

Hedging0.26

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting1.1

**Bold** markers per 1,000 characters.

List Usage5.5

Bullet and numbered list items per 1,000 characters.

Section Structure0.00

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.00

"However", "moreover", "furthermore" per 100 words.

Opening Habits
Consistency
81%
Across 2 responses
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Model Responses

11 outputs · generated before accounting joined the chat

Reviewing agent-written code?See a Brief PR report

Workshop · 127 skills

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Gemini 2.5 Flash Preview 05-20 vs Ox Alpha

Real outputs compared side by side

RANKINGS

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