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Gemini 2.5 Flash Preview 05-20 — AI Model Review

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  3. Gemini 2.5 Flash Preview 05-20
Updated May 20, 2025
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Best for:Frontend DevelopmentCreative CodingUI ReplicationNostalgia

Gemini 2.5 Flash Preview 05-20 performance data on Rival is based on blind head-to-head community voting. Overall win rate: 45.7% across 35 duels. All vote data is part of Rival's open dataset of 21,000+ human preference judgments across 200+ AI models. Model responses are curated from 10 challenges.

Gemini 2.5 Flash Preview 05-20

Gemini 2.5 Flash Preview 05-20

Gemini:
Pro 1.0
1.5 Pro
2.0 Flash Thinking
2.0 Pro Experimental
2.5 Pro Experimental
2.5 Flash Preview 05-20

Gemini 2.5 Flash May 20th Checkpoint is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks. It includes built-in "thinking" capabilities, enabling it to provide responses with greater accuracy and nuanced context handling. Note: This model is available in two variants: thinking and non-thinking. The output pricing varies significantly depending on whether the thinking capability is active. If you select the standard variant (without the ":thinking" suffix), the model will explicitly avoid generating thinking tokens. To utilize the thinking capability and receive thinking tokens, you must choose the ":thinking" variant, which will then incur the higher thinking-output pricing. Additionally, Gemini 2.5 Flash is configurable through the "max tokens for reasoning" parameter.

ConversationReasoningCode GenerationAnalysis
WebsiteOpenRouter
Feature this modelAdd badge to README
Provider
Google
Release Date
2025-05-20
Size
MEDIUM
Parameters
Not disclosed
Pricing
In: $0.15/1M
Out: $0.60/1M

API Access

Use Gemini 2.5 Flash Preview 05-20 in your applications via the OpenRouter API. Copy the code below to get started.

import requests

response = requests.post(
"https://openrouter.ai/api/v1/chat/completions"    ,
    headers={
"Authorization""Bearer $OPENROUTER_API_KEY"        : ,
"Content-Type""application/json"        : 
    },
    json={
"model""google/gemini-2.5-flash-preview-05-20"        : ,
"messages""role""user""content""Hello!"        : [{: , : }]
    }
)
print(response.json())

Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys

Model Insights

Model Responses

10 outputs from Gemini 2.5 Flash Preview 05-20

gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Pokémon Battle UI Recreation
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
Pokémon Battle UI Recreation
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Random Tailwind Webapp
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
Random Tailwind Webapp
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Generate a Stand-Up Routine
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20

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. The dream where I stand under a hot light, tell jokes, and then pray to whatever cosmic entity oversees snack food that someone buys me a churro afterwards. It's a very specific dream.

You know, I've been thinking a lot about the little things lately. Like how we, as a society, have completely lost the art of the proper grocery store queue. Remember when it was an orderly, efficient process? Now it's like a Thunderdome of trolley carts and self-scanning existential dread.

I was at the supermarket the other day, and this woman in front of me had a full-blown argument with the self-checkout machine. Not a quiet, muttering argument, but a shouting match. "I scanned you! You know I scanned you! This is manipulation, Fresh Goods 4000! You're just trying to make me feel inadequate!"

And I'm just standing there, awkwardly holding my single bag of crisps, wondering if I should intervene, like, "Ma'am, perhaps it's time to accept the machine's judgment. It saw what you did with that avocado."

And don't even get me started on the phenomenon of unsolicited life advice. Everywhere I go, someone's got a hot take on how I should live my life. I was at the gym yesterday – yes, I go to the gym, briefly, for moral support – and this guy comes up to me in the middle of a set. He's like, "You know, you're not really getting the full benefit from that curl. You need to keep your elbows tucked in more, and really focus on the eccentric movement."

And I'm just thinking, "Sir, I'm pretty sure the full benefit for me is just not face-planting on the floor. My eccentric movement is my natural state, just trying to lift this ridiculously heavy five-pound weight." Honestly, the only advice I want at the gym is, "Are you done with that water fountain?"

And then there's the internet. Oh, the internet. It's a magical place, isn't it? Where you can learn anything, connect with anyone, and also find out that someone on TikTok believes their cat is receiving messages from outer space via interpretive dance. And then you spend twenty minutes watching it. Don't judge. It was compelling.

But my favorite internet phenomenon is the comments section. It's where optimism goes to die. You could post a video of a puppy saving a baby deer from a burning building, and someone would comment, "Probably staged. And that puppy's form is terrible. Also, why wasn't there a fire extinguisher?"

It's like people have forgotten how to just… enjoy things. My goal in life now is just to find joy in small, uncomplicated moments. Like when the Wi-Fi actually connects on the first try. Or when I remember where I put my keys before I have to leave the house. These are my victories.

So thank you tonight for being here, for sharing these small joys and absurdities with me. Now, if you'll excuse me, I hear the distant siren song of a churro cart, and my dream is calling. You've been a wonderful audience! Thank you!

Generate a Stand-Up Routine
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Surprise Animal SVG
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
Surprise Animal SVG
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Retro macOS UI Recreation
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
Retro macOS UI Recreation
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20World Map SVG
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
World Map SVG
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Stochastic Consistency Test
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20

Here are 5 jokes for you:

  1. Why don't scientists trust atoms? Because they make up everything!
  2. What do you call a fake noodle? An impasta!
  3. Why did the scarecrow win an award? Because he was outstanding in his field!
  4. I told my wife she was drawing her eyebrows too high. She looked surprised.
  5. What's orange and sounds like a parrot? A carrot!

Out of these 5 jokes, all 5 are unique. Each one has a different premise and punchline.

Stochastic Consistency Test
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20SVG Layout Challenge
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
SVG Layout Challenge
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Interactive Catan Board
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
Interactive Catan Board
Run in Lab
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20Xbox Controller SVG Art
gemini-2.5-flash-preview-05-20 logo
Gemini 2.5 Flash Preview 05-20
Xbox Controller SVG Art
Run in Lab
Sponsored

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Gemini 3.1 Flash Lite Preview is Google's high-efficiency model optimized for high-volume use cases. It outperforms Gemini 2.5 Flash Lite on overall quality and approaches Gemini 2.5 Flash performance across key capabilities. Improvements span audio input/ASR, RAG snippet ranking, translation, data extraction, and code completion. Supports full thinking levels (minimal, low, medium, high) for fine-grained cost/performance trade-offs. Delivers 2.5x faster Time to First Answer Token and 45% increased output speed compared to 2.5 Flash. Priced at half the cost of Gemini 3 Flash.

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Gemini 2.5 Pro is Google's state-of-the-art AI model designed for advanced reasoning, coding, mathematics, and scientific tasks. It employs "thinking" capabilities, enabling it to reason through responses with enhanced accuracy and nuanced context handling. Gemini 2.5 Pro achieves top-tier performance on multiple benchmarks, including first-place positioning on the LMArena leaderboard, reflecting superior human-preference alignment and complex problem-solving abilities. Pricing: $1.25/M input tokens, $10/M output tokens, $5.16/K input images.

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Prompt Lab

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Send your own prompt to Gemini 2.5 Flash Preview 05-20 and 200+ others. See what comes back.

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RANKINGS

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