- Home
- LLM comparison
- Claude Sonnet 5.5 vs. Kimi K3
AnthropicMoonshot AILLM matchup
Claude Sonnet 5.5vs.Kimi K3
Which one is better?
Claude Sonnet 5.5 performs better than Kimi K3 and is cheaper: Kimi K3 costs 1.5 times as much.
Claude Sonnet 5.5
Rank 5
Kimi K3
Rank 26
Claude Sonnet 5.5
Kimi K3
Claude Sonnet 5.5
Kimi K3
Claude Sonnet 5.5
Rank 21 of 478
Kimi K3
Rank 5 of 478
Choose Claude Sonnet 5.5 for
No clear advantage for Kimi K3.
Compare other versions
Keep comparing
On this page
Where is the difference?
Strengths at a glance
Sonnet 5.5Kimi K3Median of all ranked models
95 % range: Sonnet 5.5 119.5 to 130.9, Kimi K3 90.3 to 104.2.
The same values and verdicts as the bars below. In the close-up the net starts at 90 points, just below the weaker model's lowest value; the reference group average is 100. Not in the net because a model has no own value there or the data are too thin: Multimodal.
Sonnet 5.5 is ahead in 9 of 10 areas, Kimi K3 in none.
Sonnet 5.5 ahead: 9too little data: 1
Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.
Show 3 more areas that do not count toward the overall index
Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.
Claude Sonnet 5.5 vs. Kimi K3 at the same effort
Both models measured at the same reasoning efforts. This shows whether a lead comes from the model or only from more compute.
The gap compares only the Artificial Analysis test series in which both models are measured at that effort. Tied below 3 points, ahead only beyond two standard errors.
Which model for which task?
Everyday tasks, translated from the area values above. Each row names the values it rests on.
Claude Sonnet 5.5 vs. Kimi K3 in our own test
The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.
Claude Sonnet 5.5

Oct 1, 2026 · 28 s · $0.04
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- anthropic/claude-sonnet-5.5
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 3,886 tokens
- Cost of the attempt
- $0.0389
- Response time
- 28.2 s
- API model reported in response
- anthropic/claude-sonnet-5.5
- Pinned endpoint
- Anthropic | anthropic/claude-sonnet-5.5-20260928
- Temperature
- Provider default
- Test protocol
- community-visual-tests-v1
- Technical checks
- Passed, not a quality rating
Visually reviewed. This individual test does not establish overall model quality.
Kimi K3

Oct 1, 2026 · 173 s · $0.08
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- moonshotai/kimi-k3
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 5,145 tokens
- Cost of the attempt
- $0.0775
- Response time
- 173.4 s
- API model reported in response
- moonshotai/kimi-k3
- Pinned endpoint
- Moonshot AI | moonshotai/kimi-k3-20260715
- Temperature
- Provider default
- Test protocol
- community-visual-tests-v1
- Technical checks
- Passed, not a quality rating
Visually reviewed. This individual test does not establish overall model quality.
Earlier attempts (1)
- Sep 7, 2026API request failedReasoning setting: high
SVG short test
SVG short test
One SVG task with the same fixed settings for every model, without hidden thinking.
Prompt
Return only one standalone SVG of a pelican riding a bicycle. Use viewBox="0 0 800 600", simple shapes, two clearly visible wheels and a recognizable pelican with a long beak. At most 30 SVG elements and 1800 characters. No Markdown, explanations, comments, scripts, animation, CSS or external resources.
Claude Sonnet 5.5
Unavailable in this round
Kimi K3

Oct 14, 2026 · $0.0049
Test details
- Test run
- Oct 14, 2026
- Provider
- chutes/mxfp4
- API model
- moonshotai/kimi-k3
- Output
- 495 tokens
- Reasoning
- API reports 0 reasoning tokens
- Cost of the attempt
- $0.0049
- Test round
- 43b8c5c46830
Claude Sonnet 5.5 and Kimi K3 in the overall index
Every model with a place in the overall index, both models of this matchup highlighted. You can add or hide other models.
Overall index (Gradually Meta-Score v5)
20 of 95 models
Popularity compared
How often the models are searched for, used and mentioned, on a scale from 0 to 100.
Kimi K3 is more popular than Claude Sonnet 5.5: 86 to 79 out of 100.
Over time
Weekly values from October 18, 2026 to November 13, 2026
Claude Sonnet 5.5Kimi K3
All data side by side
The better value is bold. For the overall index only when the gap is clear.
| Metric | Claude Sonnet 5.5 | Kimi K3 |
|---|---|---|
| Intelligence | ||
| Overall indexpoints, 100 = reference group average, higher is better | 121.9 | 101.5 |
| Rank | Rank 5 of 95 | Rank 26 of 95 |
| Price per 1M tokens | ||
| Inputwhat you send | $2 | $3 |
| Outputwhat the model writes | $10 | $15 |
| Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included) | $0.038 | $0.055 |
| Speed | ||
| Tokens per second | 103 | 61 |
| Popularity | ||
| Popularitysearch, usage and mentions, 0 to 100 | 79Rank 21 of 478 | 86Rank 5 of 478 |
| Technical | ||
| Context windowhow much text the model reads at once | 1 M tokens≈ 1,500 A4 pages | 1.05 M tokens≈ 1,570 A4 pages |
| Knowledge cutoff | June 2026 | n/a |
| Released | Sep 28, 2026 | Jul 16, 2026 |
| Availability | Active | Active |
| Open weights | no | yes |
Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis
Is there a better choice?
Overall index 112.6, rank 13$2 input and $10 output per 1M tokens
Sonnet 5.5 vs. Kimi K3.1 ProOverall index 127.0, rank 2$2 input and $10 output per 1M tokens
Sonnet 5.5 vs. Gemini 4 CarbonOverall index 130.9, rank 1$8 input and $40 output per 1M tokens
Sonnet 5.5 vs. Claude Fable 5.2Shared benchmarks
Single results from the same benchmark version, task and metric. A value is bold only with the same test setup and a clear gap.
A: Claude Sonnet 5.5B: Kimi K3
Show 54 more benchmarks
More comparisons
Compare Claude Sonnet 5.5 and Kimi K3 with the models people compare them with most often.
Compare another matchup
Predecessor and successor
The most popular comparisons
- 1Claude Sonnet 5.5 vs. Gemini 3.8 Flash
- 2Claude Sonnet 5.5 vs. DeepSeek-V4.1-Flash
- 3Claude Opus 5.5 vs. Claude Sonnet 5.5
- 4Claude Fable 5.2 vs. Kimi K3
- 5Claude Sonnet 5.5 vs. GLM-5.3
- 6Claude Sonnet 5.5 vs. Claude Haiku 5.5
- 7Claude Sonnet 5.5 vs. Claude Opus 5
- 8Claude Opus 5.5 vs. Kimi K3
- 9Claude Sonnet 5.5 vs. Grok 4.7
Show all 69 comparisons
- 10Claude Sonnet 5.5 vs. GPT-5.6 Terra
- 11Claude Sonnet 5.5 vs. Claude Fable 5.1
- 12Claude Sonnet 5.5 vs. Gemini 3.1 Pro Preview
- 13Claude Sonnet 5.5 vs. DeepSeek V4.1 Flash 1017
- 14GPT-6 Astra vs. Kimi K3
- 15Claude Sonnet 5.5 vs. GPT-6 Luna
- 16Claude Sonnet 5.5 vs. Qwen 3.8 27B
- 17Claude Sonnet 5.5 vs. Claude Opus 4.6
- 18Claude Sonnet 5.5 vs. DeepSeek-V4-Pro
- 19Claude Sonnet 5.5 vs. GPT-5.6 Luna
- 20Grok 4.7 vs. Kimi K3
- 21Claude Sonnet 5.5 vs. GLM-5.2
- 22Claude Sonnet 5.5 vs. DeepSeek-V4-Flash
- 23Claude Opus 5 vs. Kimi K3
- 24Claude Sonnet 5.5 vs. GPT-6 Sol
- 25Claude Sonnet 5.5 vs. Gemini 3.5 Flash-Lite
- 26DeepSeek-V4.1-Flash vs. Kimi K3
- 27Claude Sonnet 5.5 vs. Claude Fable 5
- 28Claude Sonnet 5.5 vs. Qwen 3.8 Max 0902
- 29Claude Sonnet 5.5 vs. Gemini 3.6 Flash
- 30Claude Sonnet 5.5 vs. Claude Sonnet 4.6
- 31Kimi K3 vs. GLM-5.3-Flash
- 32Claude Sonnet 5.5 vs. GPT-5.6 Sol
- 33DeepSeek V4.1 Flash 1017 vs. Kimi K3
- 34DeepSeek-V4-Pro vs. Kimi K3
- 35Claude Sonnet 5.5 vs. GLM-5.3-Flash
- 36Claude Sonnet 5.5 vs. Muse Spark 1.3
- 37DeepSeek-V4-Flash vs. Kimi K3
- 38Claude Sonnet 5.5 vs. Claude Opus 4.7
- 39Kimi K3 vs. GLM-5.3
- 40Claude Sonnet 5.5 vs. GPT-6 Astra
- 41GPT-5.6 Luna vs. Kimi K3
- 42Claude Sonnet 5.5 vs. Claude Opus 4.8
- 43Claude Sonnet 5 vs. Kimi K3
- 44Gemini 3.1 Pro Preview vs. Kimi K3
- 45GPT-6 Sol vs. Kimi K3
- 46Claude Sonnet 5.5 vs. Kimi K2.6
- 47Claude Sonnet 5.5 vs. Grok 4.6
- 48Claude Sonnet 5.5 vs. GPT-6.1 Sol
- 49Claude Sonnet 5.5 vs. Claude Sonnet 4.5
- 50Claude Sonnet 5.5 vs. Gemini 3.7 Flash
- 51Claude Fable 5 vs. Kimi K3
- 52Muse Spark 1.3 vs. Kimi K3
- 53Claude Sonnet 5.5 vs. Claude Haiku 4.5
- 54Claude Sonnet 5.5 vs. Mistral Large 4
- 55Claude Sonnet 5.5 vs. Mistral Medium 3.5
- 56Claude Opus 4.8 vs. Kimi K3
- 57Kimi K3 vs. Mistral Large 4
- 58Claude Sonnet 5.5 vs. GPT-5.4
- 59Claude Sonnet 5.5 vs. Gemini 3.5 Flash
- 60Claude Sonnet 5.5 vs. GPT-5.5
- 61Claude Sonnet 5.5 vs. Claude Opus 4.5
- 62Claude Sonnet 5.5 vs. Kimi K3.1 Pro
- 63Muse Wonder vs. Kimi K3
- 64Claude Sonnet 5.5 vs. GPT-6.1 Terra
- 65Gemini 4 Argon vs. Kimi K3
- 66Claude Sonnet 5.5 vs. Muse Wonder Full
- 67Claude Sonnet 5.5 vs. Gemini 4 Argon
- 68GPT-6.1 Sol vs. Kimi K3
- 69Claude Sonnet 5.5 vs. Gemini 4 Carbon