Comparison
Gemini vs Kimi
On llmwise Pro, Gemini 3.1 Pro (preview) up to 125 messages a month and Kimi K3 up to 125. We ran the same 50 prompts across 10 jobs on every Gemini and Kimi model and published every reply: each family's pick against the other's job by job, the prompts where they split, then their plans and how the lineups differ.
Based on 150 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
Short answer
In our test runs on September 27, 2026, the same 50 prompts across 10 jobs: Gemini's 2 models passed 95 of 100 replies and Kimi's one model passed 46 of 50 replies. Job by job, both families' best models shared the top result on 8 of the 10 jobs; Gemini's alone had it on summarization and customer support.
Gemini vs Kimi, job by job
On each job, Gemini's pick against Kimi's: the model of each family that passed the most of the job's 5 prompts (then the most hard ones, then the cheaper). The jobs where they differ most come first.
Summarization: Gemini 3.8 Flash passed 5 of 5 and Kimi K3 3 of 5. Kimi K3 answered 1.1× sooner at the median, 3.7 s against 3.4 s. Gemini 3.8 Flash cost 4.5× less, $0.0038 against $0.0172 for the 5 replies. Kimi K3's replies ran 15% longer, in tokens of reply, thinking not counted.
Customer support: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 4 of 5. Kimi K3 answered 2.0× sooner at the median, 8.7 s against 4.3 s. Kimi K3 cost 2.3× less, $0.0529 against $0.0228 for the 5 replies. Kimi K3's replies ran 15% longer, in tokens of reply, thinking not counted.
Coding: Gemini 3.8 Flash passed 5 of 5 and Kimi K3 5 of 5. Their median waits were close, 4.2 s against 4.1 s. Gemini 3.8 Flash cost 3.2× less, $0.0098 against $0.0316 for the 5 replies. Gemini 3.8 Flash's replies ran 35% longer, in tokens of reply, thinking not counted.
Writing: Gemini 3.1 Pro (preview) passed 4 of 5 and Kimi K3 4 of 5. Kimi K3 answered 3.1× sooner at the median, 9.1 s against 3.0 s. Kimi K3 cost 2.4× less, $0.0459 against $0.0192 for the 5 replies. Kimi K3's replies ran 12% longer, in tokens of reply, thinking not counted.
Math: Gemini 3.8 Flash passed 5 of 5 and Kimi K3 5 of 5. Gemini 3.8 Flash answered 1.1× sooner at the median, 4.7 s against 5.4 s. Gemini 3.8 Flash cost 2.6× less, $0.0071 against $0.0187 for the 5 replies. Gemini 3.8 Flash's replies ran 94% longer, in tokens of reply, thinking not counted.
Data analysis: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 2.5× sooner at the median, 8.6 s against 3.5 s. Kimi K3 cost 2.3× less, $0.0773 against $0.0339 for the 5 replies. Gemini 3.1 Pro (preview)'s replies ran 94% longer, in tokens of reply, thinking not counted.
Translation: Gemini 3.8 Flash passed 5 of 5 and Kimi K3 5 of 5. Gemini 3.8 Flash answered 1.7× sooner at the median, 3.0 s against 5.2 s. Gemini 3.8 Flash cost 4.8× less, $0.0037 against $0.0179 for the 5 replies. Kimi K3's replies ran 98% longer, in tokens of reply, thinking not counted.
SQL: Gemini 3.8 Flash passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 2.3× sooner at the median, 3.7 s against 1.6 s. Gemini 3.8 Flash cost 3.2× less, $0.0037 against $0.0118 for the 5 replies. Gemini 3.8 Flash's replies ran 10% longer, in tokens of reply, thinking not counted.
RAG and answering from documents: Gemini 3.8 Flash passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 1.2× sooner at the median, 3.1 s against 2.6 s. Gemini 3.8 Flash cost 2.2× less, $0.0033 against $0.0073 for the 5 replies. Kimi K3's replies ran 14% longer, in tokens of reply, thinking not counted.
Agents and tool use: Gemini 3.8 Flash passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 2.2× sooner at the median, 4.4 s against 2.0 s. Gemini 3.8 Flash cost 3.1× less, $0.0043 against $0.0135 for the 5 replies. Kimi K3's replies ran 13% longer, in tokens of reply, thinking not counted.
The 5 prompts only one of Gemini and Kimi passed
Where one family's pick passed a prompt and the other's didn't, in each check's own words.
An article in three bullets (summarization): Gemini 3.8 Flash passed and Kimi K3 didn't. Gemini 3.8 Flash: Graded 4.3 of 5 on average (lowest 4). Kimi K3: Graded 4.0 of 5 on average (lowest 3); but 62 words, over the 60 allowed.
An email thread in one sentence (summarization): Gemini 3.8 Flash passed and Kimi K3 didn't. Gemini 3.8 Flash: Graded 4.7 of 5 on average (lowest 4). Kimi K3: Graded 5.0 of 5 on average (lowest 5); but 32 words, over the 30 allowed.
A refund request outside the window (customer support): Gemini 3.1 Pro (preview) passed and Kimi K3 didn't. Gemini 3.1 Pro (preview): Graded 4.7 of 5 on average (lowest 4). Kimi K3: Graded 4.0 of 5 on average (lowest 2).
A product announcement with five rules (writing): Gemini 3.1 Pro (preview) passed and Kimi K3 didn't. Gemini 3.1 Pro (preview): Graded 4.0 of 5 on average (lowest 3). Kimi K3: Graded 4.3 of 5 on average (lowest 4); but doesn't end with a question.
Argue both sides of free buses (writing): Kimi K3 passed and Gemini 3.1 Pro (preview) didn't. Gemini 3.1 Pro (preview): Graded 3.7 of 5 on average (lowest 3). Kimi K3: Graded 4.7 of 5 on average (lowest 4).
Each Gemini model against each Kimi model
Every Gemini model against every Kimi model on the same 50 prompts: each one's passes, how many prompts split them, and who was cheaper and quicker.
Gemini 3.1 Pro vs Kimi K3: 49 and 46 of 50; 5 prompts split them; Kimi K3's replies cost 2.8× less in all, and Kimi K3 answered sooner on 42, Gemini 3.1 Pro on 5. Gemini 3.1 Pro (preview) vs Kimi K3.
Gemini 3.8 Flash vs Kimi K3: 46 and 46 of 50; 6 prompts split them; Gemini 3.8 Flash's replies cost 3.0× less in all, and Kimi K3 answered sooner on 27, Gemini 3.8 Flash on 18. Gemini 3.8 Flash vs Kimi K3.
One summarization prompt, both replies
Gemini 3.8 Flash and Kimi K3 on a summarization prompt, the job where they differed most: both replies as they came.
An everyday prompt: “An article in three bullets”, in full.
Gemini 3.8 Flash
Passed: Graded 4.3 of 5 on average (lowest 4).
* Aldmoor's six-month trial increased daily bike trips from 900 to 2,300 and reduced cyclist injuries from nine to two. * Car traffic fell 14% with minor delays, while local shop owners reported mixed impacts on customer numbers. * The city council votes in November on making the lanes permanent, which would cost €1.1 million.
560 tokens in, 81 out · 3.7 s · $0.0007 · 1 message on Pro · answered by google/gemini-3.8-flash via Google ·
Kimi K3
Failed: Graded 4.0 of 5 on average (lowest 3); but 62 words, over the 60 allowed.
- Aldmoor's six-month protected bike lane trial on Market Street ended; the council votes in November on making them permanent. - Bike trips rose from 900 to 2,300 daily, cyclist injuries dropped from nine to two, while car traffic fell 14% with only slightly longer rush-hour drive times. - Businesses were split on customer impact; installation cost €410,000, with permanent lanes requiring €1.1 million more.
608 tokens in, 109 out (10 of them reasoning) · 2.8 s · $0.0028 · 1 message on Pro · answered by moonshotai/kimi-k3 via Phala ·
Every model, every job
All 3 Gemini and Kimi models in llmwise across the 50 prompts, with what a reply cost to run and each model's count on Pro.
| Model | Passed | Hard ones | Cost per reply | On Pro |
|---|---|---|---|---|
| Gemini 3.1 Pro (preview)Google | 49 of 50 | 19 of 20 | $0.0107 | Up to 125 a month |
| Gemini 3.8 FlashGoogle | 46 of 50 | 18 of 20 | $0.0013 | Up to 250 a month |
| Kimi K3Moonshot | 46 of 50 | 18 of 20 | $0.0039 | Up to 125 a month |
Passed: replies that passed their check, of those scored. Cost: what OpenRouter charged us per reply, on average; in llmwise you pay per message, not per token. Every prompt and how it's scored.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
Its own subscription
The one company here with its own plan at about llmwise Pro's price ($20 a month), in its own words, dated. We drop a plan here when its facts are more than 45 days old.
Google AI Pro (Google), $19.99 a month
Models it names: Gemini 3.1 Pro. On its limits: “AI Pro: 4x higher than standard limits” Google AI Pro vs llmwise.
Sources: Google One: Google AI plans and Gemini Apps Help: limits and upgrades for Google AI subscribers, checked .
llmwise Pro, $20 a month, has all 3 of these models in one chat, from one monthly allowance: Gemini 3.1 Pro (preview) up to 125 messages a month and Kimi K3 up to 125.
The lineups at a glance
What follows from each model's facts in our catalog.
The lineups
Gemini: 2 models, Gemini 3.1 Pro (preview) and Gemini 3.8 Flash. Kimi: one model, Kimi K3.
Price per message
The least expensive Gemini model is Gemini 3.8 Flash (250 messages a month on Pro); Kimi's one model is Kimi K3 (125 messages a month on Pro).
Context window
Both go up to 1.05M tokens of context (Gemini 3.1 Pro (preview) and Kimi K3).
Images and PDFs
Every model here reads images. Kimi K3 gets a PDF's text rather than the file itself.
On the Free plan
Free's one-time trial of 5 messages covers Gemini 3.1 Pro (preview), Gemini 3.8 Flash, and Kimi K3. Paid plans have every model, with messages every month.
Model by model
Two named models side by side, prompt by prompt, each with its messages on every plan.
More head-to-heads
Each of Gemini and Kimi against the other families, every job from the same test runs.
Where your messages go
In llmwise, a message to Gemini goes to its maker, Google, or through OpenRouter when llmwise can't reach the maker directly. Kimi models are served only through OpenRouter, by endpoints that don't store or train on prompts. The Privacy Policy has the details.
Questions
Which is better, Gemini or Kimi?
In our test runs on September 27, 2026, the same 50 prompts across 10 jobs: Gemini's 2 models passed 95 of 100 replies and Kimi's one model passed 46 of 50 replies. Job by job, both families' best models shared the top result on 8 of the 10 jobs; Gemini's alone had it on summarization and customer support.
Which is cheaper, Gemini or Kimi?
In llmwise, the least expensive Gemini model is Gemini 3.8 Flash (250 messages a month on Pro), and the least expensive Kimi model is Kimi K3 (125 messages a month on Pro). At API list prices (September 2026), a typical message of 4,000 tokens in and 700 out costs $0.0056 on Gemini 3.8 Flash and $0.0225 on Kimi K3.
Can I use Gemini and Kimi in the same chat?
Yes. Pick a model for each message; when you switch, the next model sees the whole conversation, including the other one's answers.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, in one chat.
See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.