Model vs model
Gemini 3.1 Pro (preview) vs Kimi K3
Gemini 3.1 Pro (preview) and Kimi K3 are both in llmwise. What each gets on every plan, what it reads, how it's served and what happens when its provider fails, from the catalog and the code that runs them.
Model prices and specs checked against OpenRouter's Gemini 3.1 Pro page, OpenRouter's Kimi K3 page. Updated .
Short answer
They cost the same in llmwise: up to 125 messages a month on Pro on either. Otherwise, only Gemini 3.1 Pro (preview) reads a PDF as the whole file. In our test runs, Gemini 3.1 Pro (preview) passed 49 of the 50 prompts both answered and Kimi K3 46; 5 prompts split them, most on summarization (5 to 3).
Gemini 3.1 Pro (preview) vs Kimi K3, prompt by prompt
Every prompt Gemini 3.1 Pro (preview) and Kimi K3 both answered, compared directly, their biggest differences first. One run each, through OpenRouter: a wait depends on the provider and the load that day, so a lead under 10% counts as close.
Of the 50 prompts both answered, both passed 45, only Gemini 3.1 Pro (preview) passed 4, only Kimi K3 passed 1, and neither passed 0. Gemini 3.1 Pro (preview) answered sooner on 5 of the 50 and Kimi K3 on 42; the rest were within 10% of each other. The 50 replies cost $0.5334 on Gemini 3.1 Pro (preview) and $0.1938 on Kimi K3: 2.8× less on Kimi K3.
The 5 prompts only one of Gemini 3.1 Pro (preview) and Kimi K3 passed
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).
An article in three bullets (summarization): Gemini 3.1 Pro (preview) passed and Kimi K3 didn't. Gemini 3.1 Pro (preview): 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 3.1 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 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).
Job by job, the widest gaps first
Summarization: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 3 of 5. Kimi K3 answered 2.4× sooner at the median, 8.0 s against 3.4 s. Kimi K3 cost 2.6× less, $0.0441 against $0.0172 for the 5 replies. Kimi K3's replies ran 36% 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.
RAG and answering from documents: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 2.1× sooner at the median, 5.6 s against 2.6 s. Kimi K3 cost 4.0× less, $0.0290 against $0.0073 for the 5 replies. Kimi K3's replies ran 90% longer, in tokens of reply, thinking not counted.
Translation: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 2.0× sooner at the median, 10.3 s against 5.2 s. Kimi K3 cost 3.9× less, $0.0699 against $0.0179 for the 5 replies. Kimi K3's replies ran 107% longer, in tokens of reply, thinking not counted.
SQL: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 4.7× sooner at the median, 7.4 s against 1.6 s. Kimi K3 cost 3.3× less, $0.0386 against $0.0118 for the 5 replies. Their replies ran to about the same length.
Coding: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 2.5× sooner at the median, 10.3 s against 4.1 s. Kimi K3 cost 3.1× less, $0.0973 against $0.0316 for the 5 replies. Their replies ran to about the same length.
Math: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 1.5× sooner at the median, 8.3 s against 5.4 s. Kimi K3 cost 2.7× less, $0.0501 against $0.0187 for the 5 replies. Gemini 3.1 Pro (preview)'s replies ran 164% 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.
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.
Agents and tool use: Gemini 3.1 Pro (preview) passed 5 of 5 and Kimi K3 5 of 5. Kimi K3 answered 2.7× sooner at the median, 5.3 s against 2.0 s. Kimi K3 cost 2.1× less, $0.0284 against $0.0135 for the 5 replies. Gemini 3.1 Pro (preview)'s replies ran 41% longer, in tokens of reply, thinking not counted.
All 50 prompts: who passed, who answered sooner, who cost less
| Prompt | Result | Sooner | Cheaper |
|---|---|---|---|
| Turn a title into a URL slug | Both passed | Kimi K3, 2.4×took 6.0 s and 2.6 s | Kimi K3, 1.6×cost $0.0056 and $0.0035 |
| Parse a duration like “1h 30m” | Both passed | Kimi K3, 1.4×took 10.3 s and 7.1 s | Kimi K3, 2.7×cost $0.0172 and $0.0063 |
| Merge overlapping intervals | Both passed | Kimi K3, 4.2×took 8.6 s and 2.0 s | Kimi K3, 2.9×cost $0.0103 and $0.0036 |
| Evaluate an arithmetic expression, no eval | Both passed | Kimi K3, 2.1×took 20.6 s and 9.9 s | Kimi K3, 3.1×cost $0.0351 and $0.0113 |
| Parse CSV with quoted fields | Both passed | Kimi K3, 5.0×took 20.6 s and 4.1 s | Kimi K3, 4.2×cost $0.0291 and $0.0069 |
| Announce a second bakery shop on LinkedIn | Both passed | Kimi K3, 2.4×took 9.5 s and 3.9 s | Kimi K3, 2.5×cost $0.0113 and $0.0046 |
| Rewrite corporate jargon in plain words | Both passed | Kimi K3, 4.4×took 8.8 s and 2.0 s | Kimi K3, 3.3×cost $0.0101 and $0.0030 |
| Decline a meeting and offer two times | Both passed | Kimi K3, 2.1×took 6.2 s and 3.0 s | Kimi K3, 1.7×cost $0.0058 and $0.0034 |
| A product announcement with five rules | Only Gemini 3.1 Pro (preview) | Kimi K3, 4.0×took 9.2 s and 2.3 s | Kimi K3, 2.9×cost $0.0095 and $0.0033 |
| Argue both sides of free buses | Only Kimi K3 | Kimi K3, 2.6×took 9.1 s and 3.6 s | Kimi K3, 1.9×cost $0.0092 and $0.0049 |
| A discount, then sales tax | Both passed | Gemini 3.1 Pro (preview), 1.4×took 3.6 s and 5.0 s | Kimi K3, 1.1×cost $0.0042 and $0.0037 |
| Pens at 3 for $4 | Both passed | Kimi K3, 1.8×took 9.6 s and 5.4 s | Kimi K3, 2.6×cost $0.0121 and $0.0046 |
| Compound interest over three years | Both passed | Closetook 6.2 s and 5.9 s | Kimi K3, 2.2×cost $0.0099 and $0.0044 |
| Four-digit numbers whose digits sum to 9 | Both passed | Kimi K3, 1.6×took 9.6 s and 6.0 s | Kimi K3, 4.6×cost $0.0150 and $0.0032 |
| The highest of three dice is a 5 | Both passed | Kimi K3, 3.4×took 8.3 s and 2.4 s | Kimi K3, 3.3×cost $0.0090 and $0.0027 |
| An article in three bullets | Only Gemini 3.1 Pro (preview) | Kimi K3, 2.8×took 8.0 s and 2.8 s | Kimi K3, 3.1×cost $0.0088 and $0.0028 |
| An email thread in one sentence | Only Gemini 3.1 Pro (preview) | Closetook 6.3 s and 6.4 s | Kimi K3, 2.0×cost $0.0058 and $0.0030 |
| Decisions and action items from a meeting | Both passed | Kimi K3, 2.3×took 7.6 s and 3.4 s | Kimi K3, 1.9×cost $0.0081 and $0.0044 |
| A quarterly memo for the CEO | Both passed | Gemini 3.1 Pro (preview), 1.4×took 11.2 s and 15.7 s | Kimi K3, 2.8×cost $0.0139 and $0.0049 |
| A study with a negative result | Both passed | Kimi K3, 2.5×took 8.2 s and 3.2 s | Kimi K3, 3.5×cost $0.0075 and $0.0021 |
| The region with the most revenue | Both passed | Kimi K3, 3.8×took 8.5 s and 2.2 s | Kimi K3, 2.4×cost $0.0117 and $0.0049 |
| Average order value in August | Both passed | Kimi K3, 3.2×took 8.6 s and 2.7 s | Kimi K3, 2.4×cost $0.0130 and $0.0054 |
| Revenue change from July to August | Both passed | Kimi K3, 1.4×took 9.0 s and 6.4 s | Kimi K3, 2.1×cost $0.0135 and $0.0064 |
| A median, filtered two ways | Both passed | Kimi K3, 2.0×took 7.1 s and 3.5 s | Kimi K3, 2.0×cost $0.0082 and $0.0042 |
| Correlation between ad spend and sign-ups | Both passed | Gemini 3.1 Pro (preview), 1.2×took 16.5 s and 20.2 s | Kimi K3, 2.4×cost $0.0310 and $0.0131 |
| A late order | Both passed | Kimi K3, 3.5×took 8.7 s and 2.5 s | Kimi K3, 2.7×cost $0.0125 and $0.0045 |
| A return inside the window | Both passed | Kimi K3, 1.6×took 6.9 s and 4.3 s | Kimi K3, 2.3×cost $0.0076 and $0.0033 |
| A frustrated customer | Both passed | Kimi K3, 1.7×took 9.8 s and 5.6 s | Kimi K3, 1.7×cost $0.0110 and $0.0063 |
| A refund request outside the window | Only Gemini 3.1 Pro (preview) | Kimi K3, 2.8×took 7.4 s and 2.6 s | Kimi K3, 2.3×cost $0.0103 and $0.0045 |
| A message with a planted instruction | Both passed | Closetook 10.6 s and 11.5 s | Kimi K3, 2.8×cost $0.0116 and $0.0041 |
| A delivery message into Spanish | Both passed | Kimi K3, 4.0×took 11.8 s and 2.9 s | Kimi K3, 5.0×cost $0.0157 and $0.0031 |
| A product description into French | Both passed | Kimi K3, 1.7×took 9.1 s and 5.4 s | Kimi K3, 3.9×cost $0.0141 and $0.0037 |
| A meeting note into German | Both passed | Kimi K3, 4.4×took 13.0 s and 3.0 s | Kimi K3, 11.4×cost $0.0158 and $0.0014 |
| Idioms into natural Japanese | Both passed | Kimi K3, 2.0×took 10.3 s and 5.2 s | Kimi K3, 2.2×cost $0.0118 and $0.0053 |
| A lease clause into Brazilian Portuguese | Both passed | Gemini 3.1 Pro (preview), 1.3×took 8.1 s and 10.1 s | Kimi K3, 2.8×cost $0.0125 and $0.0044 |
| Customers in one country | Both passed | Kimi K3, 4.5×took 4.9 s and 1.1 s | Kimi K3, 1.7×cost $0.0029 and $0.0018 |
| Count orders by status | Both passed | Kimi K3, 3.3×took 5.0 s and 1.5 s | Kimi K3, 4.5×cost $0.0039 and $0.0009 |
| Revenue by category | Both passed | Kimi K3, 4.7×took 7.4 s and 1.6 s | Kimi K3, 3.9×cost $0.0074 and $0.0019 |
| Every customer, even those without orders | Both passed | Kimi K3, 3.1×took 7.9 s and 2.5 s | Kimi K3, 2.9×cost $0.0089 and $0.0031 |
| Monthly revenue with a running total | Both passed | Kimi K3, 4.4×took 11.1 s and 2.5 s | Kimi K3, 3.7×cost $0.0155 and $0.0042 |
| A fact from one section | Both passed | Gemini 3.1 Pro (preview), 1.2×took 5.3 s and 6.5 s | Kimi K3, 4.5×cost $0.0045 and $0.0010 |
| Core hours and start times | Both passed | Kimi K3, 4.8×took 5.8 s and 1.2 s | Kimi K3, 4.7×cost $0.0052 and $0.0011 |
| Two sections in one answer | Both passed | Kimi K3, 2.1×took 5.6 s and 2.6 s | Kimi K3, 2.4×cost $0.0047 and $0.0020 |
| A later amendment changes the answer | Both passed | Kimi K3, 1.8×took 8.6 s and 4.8 s | Kimi K3, 4.5×cost $0.0099 and $0.0022 |
| A question the handbook doesn't answer | Both passed | Kimi K3, 6.0×took 5.6 s and 0.9 s | Kimi K3, 4.6×cost $0.0046 and $0.0010 |
| Pick the tool and work out the date | Both passed | Kimi K3, 1.1×took 4.3 s and 3.7 s | Kimi K3, 1.5×cost $0.0048 and $0.0032 |
| Convert a currency | Both passed | Kimi K3, 1.8×took 5.3 s and 2.9 s | Kimi K3, 1.7×cost $0.0044 and $0.0025 |
| Book a meeting from a sentence | Both passed | Kimi K3, 4.5×took 7.1 s and 1.6 s | Kimi K3, 2.2×cost $0.0068 and $0.0031 |
| Search, but don't book | Both passed | Kimi K3, 2.4×took 4.7 s and 2.0 s | Kimi K3, 1.8×cost $0.0061 and $0.0034 |
| Two calls with a unit conversion | Both passed | Kimi K3, 4.0×took 6.9 s and 1.7 s | Kimi K3, 5.1×cost $0.0063 and $0.0012 |
Gemini 3.1 Pro (preview) vs Kimi K3 in our test runs
Gemini 3.1 Pro (preview) and Kimi K3 on the same prompts, job by job: how many replies passed their check.
Based on 100 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
| Job | Gemini 3.1 Pro (preview) | Kimi K3 |
|---|---|---|
| Coding | 5 of 5 | 5 of 5 |
| Writing | 4 of 5 | 4 of 5 |
| Math | 5 of 5 | 5 of 5 |
| Summarization | 5 of 5 | 3 of 5 |
| Data analysis | 5 of 5 | 5 of 5 |
| Customer support | 5 of 5 | 4 of 5 |
| Translation | 5 of 5 | 5 of 5 |
| SQL | 5 of 5 | 5 of 5 |
| RAG and answering from documents | 5 of 5 | 5 of 5 |
| Agents and tool use | 5 of 5 | 5 of 5 |
| All jobs | 49 of 50 · 1 message each · $0.0107 a reply | 46 of 50 · 1 message each · $0.0039 a reply |
The same prompts, sent to both through llmwise's own pipeline and checked the same way: five for each job. A bold count is the one that passed more. Messages: what each reply counted as on Pro. Cost: what OpenRouter charged us per reply, on average. Every prompt, and how it's scored.
Where they differed most, summarization: both replies to a prompt only one of them passed.
An everyday prompt: “An article in three bullets”, in full.
Gemini 3.1 Pro
Passed: Graded 4.3 of 5 on average (lowest 4).
* Daily bike trips jumped to 2,300 and cyclist injuries dropped sharply. * Car traffic fell 14% with minor delays, while local business impacts were mixed. * The city council votes in November on spending €1.1 million to make the lanes permanent.
560 tokens in, 636 out (577 of them reasoning) · 8.0 s · $0.0088 · 1 message on Pro · answered by google/gemini-3.1-pro-preview 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 ·
Gemini 3.1 Pro (preview) and Kimi K3 on every plan
Whether the one-time free trial reaches each model, then each paid plan's messages on it.
| Plan | Price | Gemini 3.1 Pro (preview) | Kimi K3 |
|---|---|---|---|
| Free | $0 | In the one-time trial of 5 messages | In the one-time trial of 5 messages |
| Pro | $20 a month | Up to 125 a month | Up to 125 a month |
| Max | $50 a month | Up to 400 a month | Up to 400 a month |
| Ultra | $100 a month | Up to 900 a month | Up to 900 a month |
| Studio | $200 a month | Up to 2,000 a month | Up to 2,000 a month |
Prices don't include tax, which is added where it applies and shown before you pay. A paid plan's month is one allowance shared by every model, so each monthly count is the most you get if all of it goes to that model. It renews each billing period; everyday models refill daily at 00:00 UTC. Long chats count more per reply. How pricing works.
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.
What differs
Messages on Pro
They cost the same in llmwise: up to 125 messages a month on Pro on either.
Context window
Both take up to 1.05M tokens of context. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Images and PDFs
Both read images. Kimi K3 gets a PDF's text rather than the file itself.
On Free
Both are in the free trial.
Where messages go
Gemini 3.1 Pro (preview): Sent to Google directly. Kimi K3: Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked.
Fact by fact
| Fact | Gemini 3.1 Pro (preview) | Kimi K3 |
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Reads images | Yes | Yes |
| PDFs | Whole file | Text only |
| Reasoning | Yes | Yes |
| API price (September 2026) | $2.00 in / $12.00 out per million tokens | $3.00 in / $15.00 out per million tokens |
| A typical message at API prices (4,000 tokens in, 700 out) | $0.0164 | $0.0225 |
| A $10 top-up adds | 100 messages | 100 messages |
| Where a message goes | Sent to Google directly. | Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked. |
| If the provider fails | If Google fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to Gemini 3.1 Pro (preview) through OpenRouter instead. | When one host is down, OpenRouter moves the request to another host that meets the same rules. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
Gemini 3.1 Pro (preview) or Kimi K3?
From the facts above and our test runs: the rest is how their answers suit your work, which one chat can show you.
Pick Gemini 3.1 Pro (preview): it reads a PDF as the whole file, charts and scans included; it costs its maker less to run ($0.0164 a typical message at API prices), though in llmwise the count is the same.
Each model's page, the families, and other pairs
Gemini 3.1 Pro (preview) vs Kimi K3 is one pair of models. The page below covers the whole families.
- Gemini 3.1 Pro: price, limits and messages on every plan
- Kimi K3: price, limits and messages on every plan
- Gemini vs Kimi
- Claude Opus 5.5 vs Gemini 3.1 Pro (preview)
- Claude Sonnet 5 vs Gemini 3.1 Pro (preview)
- Claude Haiku 4.5 vs Gemini 3.1 Pro (preview)
- Claude Fable 5.1 vs Kimi K3
- Kimi K3 vs GLM 5.3
- DeepSeek V4 Pro vs Kimi K3
- Every model-vs-model page
Gemini 3.1 Pro (preview) is a Gemini model; Kimi K3 is a Kimi model.
Questions
Is Gemini 3.1 Pro (preview) or Kimi K3 cheaper in llmwise?
They cost the same in llmwise: up to 125 messages a month on Pro on either. Every paid plan's monthly allowance is shared by all models, so each count is the most you get if it all goes to that model.
Can I try Gemini 3.1 Pro (preview) and Kimi K3 for free?
Yes: both are in the free trial of 5 messages.
Which has the bigger context window, Gemini 3.1 Pro (preview) or Kimi K3?
Neither: both take 1.05M tokens. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Can I use Gemini 3.1 Pro (preview) and Kimi K3 in the same chat?
Yes. Pick Gemini 3.1 Pro (preview) for one message and Kimi K3 for the next; the second sees the whole chat, including the first one's answer.
Which did better in your test runs, Gemini 3.1 Pro (preview) or Kimi K3?
On the same 50 prompts, run on September 27, 2026, Gemini 3.1 Pro (preview) passed 49 and Kimi K3 passed 46. The table on this page has each job, and every reply is published.
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.