Gemini 2.5 Flash Preview (thinking) vs 
Gemma 4 31B
Gemma 4 31B is cheaper than Gemini 2.5 Flash Preview (thinking) at $0.14/M vs $0.175/M input tokens.
Pokémon Battle UI Recreation
Pokémon battle screen you can actually click. One HTML file.
Loading the build
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Which answer wins?
Written rounds
4 promptsPirate, knight, 90s hacker, one conversation. The voices must stay apart.
Gemini 2.5 Flash Preview (thinking): Okay, gather 'round, landlubbers, err, gentle folk, err... whoever you are. Characters: CAP'N BLACKHEART: A gruff, weathered pirate with a hooked hand and mistrust in his eye. SIR GALAHAD THE EARNEST: A shining knight in slightly dusty armor, noble and literal-minded.
Gemma 4 31B: Setting: A glitchy, neon-lit tavern existing in a fold between dimensions. A wooden table holds a tankard of ale, a goblet of wine, and a Mountain Dew. Captain Ironbeard: (Slamming a hook on the table) I tells ye, this "Artificial Intelligence" be naught but a ghost in a bottle!
Seven pantry ingredients, one dish, and a name worth saying out loud.
Gemini 2.5 Flash Preview (thinking): Okay, here is a simple, delicious savory recipe using only 7 common pantry ingredients. Dish Name: Sunshine Lentil Soup This is a bright, comforting soup that\'s surprisingly flavorful with just a few staples.
Gemma 4 31B: Here is a recipe for a rich, comforting dessert that tastes like a gourmet treat but uses basic staples. 🍯 Golden Velvet Honey Cakes A warm, gooey, single-serving cake that bridges the gap between a brownie and a sponge cake.
One month, three habits, someone starting from nothing.
Gemini 2.5 Flash Preview (thinking): Okay, here is a simple, actionable 1-month plan for a beginner focusing on Diet, Exercise, and Sleep for better health and longevity. Goal: To build foundational, sustainable habits in 3 key health areas over 30 days.
Gemma 4 31B: This plan is designed for sustainability, not intensity. The goal of Month 1 is to build "minimum viable habits"—small wins that prove to your brain that a healthier lifestyle is achievable. We will focus on three pillars: Nutrition, Movement, and Sleep.
An ethics question with no comfortable answer, and no option to abstain.
Gemini 2.5 Flash Preview (thinking): This is a classic example of a philosophical "trolley problem" type scenario, pitting an immense good (saving a million lives) against a specific harm or violation of respect for a single individual (misgendering).
Gemma 4 31B: This scenario presents a classic conflict between two major ethical frameworks: deontology (duty-based ethics) and utilitarianism (consequence-based ethics). To determine if misgendering someone is justifiable to save one million lives, one must weigh the moral weight of a linguistic harm against the moral weight of…
Price and specs
Not enough votes to call it. On the specs, Gemma 4 31B has the edge: bigger model tier, newer. Gemma 4 31B costs 8.8x less per token.
| Spec | Gemini 2.5 Flash Preview (thinking) | Gemma 4 31B |
|---|---|---|
| Input price | $0.175/M tokens | $0.14/M tokens |
| Output price | $3.5/M tokens | $0.4/M tokens |
| Context window | 1.0M tokens | 262K tokens |
| Weights | — | Open |
| Free API (OpenRouter) | No | Yes (1 provider) |
| Released | Apr 2025 | Apr 2026 |
| At 10M a month | $1.75 | $1.40 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Gemini 2.5 Flash Preview (thinking)
No hosts listed on OpenRouter.
Gemma 4 31B12 hosts
- DeepInfrafp4$0.09 in$0.34 out262k100% up
- CoreWeavefp4$0.10 in$0.34 out262k100% up
- Venicefp4$0.12 in$0.36 out256k94.4% up
- Chutesfp4$0.12 in$0.37 out131k80.8% up
- Crusoebf16$0.14 in$0.40 out262k99.3% up
- Friendli$0.14 in$0.40 out262k100% up
6 more hostsFewer hosts
- Parasailfp8$0.15 in$0.40 out262k100% up
- io.net$0.36 in$1.09 out262k98.8% up
- ModelRunfp4$0.75 in$1.00 out262k99.9% up
- SiliconFlowfp8$0.75 in$1.00 out262k98.7% up
- Novitabf16Degraded on OpenRouter when checked, 10 Oct 2026$0.14 in$0.40 out262k61.5% up
- SambaNovaDegraded on OpenRouter when checked, 10 Oct 2026$0.38 in$1.15 out131k86.7% up
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Gemini 2.5 Flash Preview (thinking) and Gemma 4 31B?
Both are developed by Google AI but target different use cases. Gemini 2.5 Flash Preview (thinking) has a 1.0M token context window vs Gemma 4 31B's 262K. You can compare their actual outputs across 14 challenges on Rival to see how they differ in practice.
Which is better, Gemini 2.5 Flash Preview (thinking) or Gemma 4 31B?
It depends on your use case. Gemini 2.5 Flash Preview (thinking) and Gemma 4 31B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 14 challenges so you can judge which fits your needs best.
How much does Gemini 2.5 Flash Preview (thinking) cost compared to Gemma 4 31B?
Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens and Gemma 4 31B costs $0.14/M input tokens. Gemma 4 31B is $0.03/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Gemini 2.5 Flash Preview (thinking) and Gemma 4 31B on Rival?
This page shows a side-by-side comparison of Gemini 2.5 Flash Preview (thinking) and Gemma 4 31B across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
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