Side by side
Gemini 4 Argon and Kimi K3.1 Pro, line by line
Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.
| Fact | Gemini 4 Argon | Kimi K3.1 Pro |
|---|---|---|
| Price | ||
| Price per 1M input tokens | $2 | $2 |
| Price per 1M output tokens | $10 | $10 |
| Independent benchmarks | ||
| Arena Text | 1525 Elo (#1 of 49) | Not measured |
| Specs | ||
| Provider | Moonshot Kimi | |
| Release date | September 30, 2026 | October 23, 2026 |
| Access | API only | API only |
| Context window | 1,048,576 tokens | 1,048,576 tokens |
| Max output | 1,000,000 tokens | Not reported |
| Input | text, image, video | text, image, video |
| Output | text | text |
No independent benchmark has scored both models yet. Each rank counts the current models scored on that benchmark.
Scores:Arena · 2026-10-12
Charts
Against every current text model
Where Gemini 4 Argon and Kimi K3.1 Pro land among the current models of their task, on every independent benchmark, on price and on context.
Where each stands
Only Gemini 4 Argon has a current Arena Text score: #1 of 49. Each bar is the share of current models it beats.
Independent benchmarks
Arena Text
Gemini 4 Argon:#1of 49
1,525 Elo · ahead of 100%
Kimi K3.1 Pro: Not scored
Price and context
Price per 1M input tokens
Gemini 4 Argon:#28of 51
$2 · cheaper than 24%
Kimi K3.1 Pro:#28of 51
$2 · cheaper than 24%
Price per 1M output tokens
Gemini 4 Argon:#33of 51
$10 · cheaper than 26%
Kimi K3.1 Pro:#33of 51
$10 · cheaper than 26%
Context window
Gemini 4 Argon:#11of 66
1.05M tokens · longer than 65%
Kimi K3.1 Pro:#11of 66
1.05M tokens · longer than 65%
Quality against price
Gemini 4 Argon scores 1,525 at $4 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.
Quality against price: the data
| Model | Provider | Blended price per 1M tokens | Arena Text (Elo) |
|---|---|---|---|
| Gemini 4 Argon | $4 | 1,525 | |
| Claude Opus 5.5 | Anthropic | $8 | 1,507 |
| Claude Fable 5 | Anthropic | $20 | 1,504 |
| Claude Fable 5.1 | Anthropic | $20 | 1,501 |
| Gemini 3.8 Flash | $1.50 | 1,497 | |
| Muse Spark 1.3 | Meta | $2 | 1,494 |
| Claude Opus 5 | Anthropic | $10 | 1,490 |
| Kimi K3 | Moonshot Kimi | $6 | 1,488 |
| Gemini 3.7 Flash | $1.50 | 1,486 | |
| GPT-5.6 Sol | OpenAI | $8 | 1,485 |
| GPT-6.1 Sol | OpenAI | $4 | 1,484 |
| Qwen3.8-Max | Alibaba Qwen | $3 | 1,483 |
| GPT-5.5 | OpenAI | $11 | 1,482 |
| Gemini 3.6 Flash | $3 | 1,482 | |
| Claude Opus 4.8 | Anthropic | $10 | 1,481 |
| MiMo-V2.6-Pro | Xiaomi MiMo | $0.54 | 1,480 |
| GLM-5.3 | Z.ai | $2.15 | 1,478 |
| Claude Sonnet 5.5 | Anthropic | $4 | 1,476 |
| GPT-5.4 | OpenAI | $5.63 | 1,475 |
| GPT-6 Astra | OpenAI | $20 | 1,475 |
| DeepSeek-V4.1-Flash | DeepSeek | $0.52 | 1,475 |
| GLM-5.3-Flash | Z.ai | $0.24 | 1,475 |
| Gemini 3 Flash Preview | $1.13 | 1,473 | |
| Grok 4.20 | xAI | $1.56 | 1,472 |
| GPT-5.6 Terra | OpenAI | $4.50 | 1,466 |
| Grok 4.5 | xAI | $3 | 1,466 |
| DeepSeek-V4-Pro | DeepSeek | $1.98 | 1,465 |
| Claude Sonnet 5 | Anthropic | $4 | 1,461 |
| GPT-6 Sol | OpenAI | $4 | 1,456 |
| Gemini 3.5 Flash-Lite | $0.85 | 1,455 | |
| Grok 4.6 | xAI | $3 | 1,454 |
| GPT-5.6 Luna | OpenAI | $0.45 | 1,452 |
| MiMo-V2.6-Flash | Xiaomi MiMo | $0.18 | 1,451 |
| GPT-6 Luna | OpenAI | $0.20 | 1,443 |
| Grok 4.7 | xAI | $3 | 1,443 |
| Grok 4.3 | xAI | $1.56 | 1,442 |
| Mistral Large 4 | Mistral AI | $2.06 | 1,429 |
| GPT-4.1 | OpenAI | $3.50 | 1,415 |
| Solar Pro 4 | Upstage | $0.52 | 1,386 |
| GPT-4.1 mini | OpenAI | $0.70 | 1,383 |
| GPT-4.1 nano | OpenAI | $0.18 | 1,322 |
Cost
What each costs
Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.
The same work, priced
At each provider's listed rates.
10M input and 2M output tokens
The same price
- Gemini 4 Argon
- $40
- Kimi K3.1 Pro
- $40
The same, with 9M of the input tokens cached
Kimi K3.1 Pro costs 1.0× as much
- Gemini 4 Argon
- $22.90
- Kimi K3.1 Pro
- $23.80
| Workload or rate | Gemini 4 Argon | Kimi K3.1 Pro |
|---|---|---|
| Example workloads | ||
| 10M input and 2M output tokens | $40 | $40 |
| The same, with 9M of the input tokens cached | $22.90 (better) | $23.80 |
| Other listed rates | ||
| 1M input tokens, cached | $0.10 (better) | $0.20 |
| 1M input tokens, 5-minute cache write | Not listed | $2 |
| 1M input tokens, 1-hour cache write | Not listed | $4 |
| 1M input tokens, Highspeed endpoint | Not listed | $4 |
| 1M output tokens, Highspeed endpoint | Not listed | $20 |
Verdict
When to choose each
Gemini 4 Argon
Where it leads
- Cheaper cached input, $0.10 vs $0.20 per 1M tokens
Best for
- Long-horizon coding and knowledge work once it reaches general API access
Watch out for
- The $2 input and $10 output rates are introductory and end on November 30, 2026; from December 1 Google charges $4 and $20 per 1M tokens
- Not on the Gemini API free tier, and explicit context caching is not supported; implicit caching takes 95% off repeated input
- Answers longer than 64K tokens need background execution, and Google advises client timeouts of at least 15 minutes for hard prompts
Kimi K3.1 Pro
Where it leads
No measured lead over Gemini 4 Argon in this data.
Best for
- Long-horizon coding and agent work at mid-tier prices
- Long documents, images and video in one 1M-token context
Watch out for
- Thinking is always on: reasoning effort runs low, high or max, and max is the default
- The Highspeed endpoint, two to three times faster by Moonshot's account, costs twice as much at $4 input and $20 output per 1M tokens
- Weights are promised by 4 November 2026 and were not out when this record was made; no independent benchmark score is recorded here yet
From benchmark to production
Building on Gemini 4 Argon or Kimi K3.1 Pro?
Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.
FAQ
Gemini 4 Argon vs Kimi K3.1 Pro FAQ
Which is cheaper, Gemini 4 Argon or Kimi K3.1 Pro?
Both cost $2 per 1M input tokens. For 10M input and 2M output tokens, Gemini 4 Argon costs $40 and Kimi K3.1 Pro $40 at standard rates.
Which is cheaper with prompt caching, Gemini 4 Argon or Kimi K3.1 Pro?
Gemini 4 Argon charges $0.10 per 1M cached input tokens, 95% below its standard input rate, and Kimi K3.1 Pro $0.20, 90% below. With 9M of 10M input tokens cached and 2M output tokens, Gemini 4 Argon costs $22.90 and Kimi K3.1 Pro $23.80.
Which has the larger context window, Gemini 4 Argon or Kimi K3.1 Pro?
Both accept 1,048,576 tokens of context.
Further reading
More on Gemini 4 Argon and Kimi K3.1 Pro
Articles on Gemini 4 Argon and Kimi K3.1 Pro
- Kimi K3.1 Pro: Benchmarks, Price and Should You Switch?October 25, 2026
- Gemini 4 Argon Benchmarks: What Independent Tests ShowOctober 1, 2026
- Gemini 4 Pro Leaks: What's Verified and What's HypeOctober 1, 2026
Related comparisons
- Claude Fable 5.1 vs Gemini 4 Argon
- Claude Sonnet 5.5 vs Kimi K3.1 Pro
- Claude Fable 5 vs Gemini 4 Argon
- Claude Sonnet 5 vs Kimi K3.1 Pro
- Claude Opus 5.5 vs Gemini 4 Argon
- GPT-4.1 vs Kimi K3.1 Pro
- Claude Sonnet 5.5 vs Gemini 4 Argon
- Kimi K3 vs Kimi K3.1 Pro
- Claude Sonnet 5 vs Gemini 4 Argon
- Gemini 4 Argon vs GPT-4.1
- Gemini 4 Argon vs GPT-5.6 Terra
- Gemini 4 Argon vs GPT-6.1 Sol
Production evaluation
Choosing between Gemini 4 Argon and Kimi K3.1 Pro?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty