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- Claude Opus 5.5 vs. Kimi K3
AnthropicMoonshot AILLM matchup
Claude Opus 5.5vs.Kimi K3
Which one is better?
Claude Opus 5.5 performs better than Kimi K3, but costs 1.3 times as much.
Claude Opus 5.5
Rank 1
Kimi K3
Rank 23
Claude Opus 5.5
Kimi K3
Claude Opus 5.5
Kimi K3
Claude Opus 5.5
Rank 8 of 785
Kimi K3
Rank 12 of 785
Choose Claude Opus 5.5 for
Choose Kimi K3 for
No clear advantage
On this page
Where is the difference?
Strengths at a glance
Opus 5.5Kimi K3Median of all ranked models
95 % range: Opus 5.5 121.2 to 138.7, Kimi K3 90.7 to 103.9.
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.
Opus 5.5 is ahead in 10 of 10 areas, Kimi K3 in none.
Opus 5.5 ahead: 10
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 4 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 Opus 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.
| Effort | Opus 5.5 | Kimi K3 | Gap | Verdict | Test series |
|---|---|---|---|---|---|
| low | 106.6 | 87.0 | 24.5 | Opus 5.5 ahead | 12 |
| max | 126.1 | 101.2 | 12.2 | Opus 5.5 slightly ahead | 5 |
| Overall index (max vs. max) | 126.1 | 101.2 | 24.9 | Opus 5.5 ahead |
Gap and verdict compare 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. The single values rest on all test series of each model, so their difference can deviate from the gap.
Which model for which task?
Everyday tasks, translated from the area values above. Each row names the values it rests on.
See for yourself: same task, one attempt
The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.
Claude Opus 5.5

Oct 1, 2026 · 33 s · $0.07
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- anthropic/claude-opus-5.5
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 3,536 tokens
- Cost of the attempt
- $0.0708
- Response time
- 33.2 s
- API model reported in response
- anthropic/claude-opus-5.5
- Pinned endpoint
- Anthropic | anthropic/claude-opus-5.5-20260921
- 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 Opus 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 Opus 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 v4)
20 of 92 models
4 models in this view are measured at a lower reasoning effort than max in the overall index. Dashed column: lower reasoning effort than the top.
Popularity compared
How often the models are searched for, used and mentioned, on a scale from 0 to 100.
Both are about as popular: Claude Opus 5.5 68, Kimi K3 67 out of 100.
Over time
Weekly values from October 18, 2026 to November 7, 2026
Claude Opus 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 Opus 5.5 | Kimi K3 |
|---|---|---|
| Intelligence | ||
| Overall indexpoints, 100 = reference group average, higher is better | 126.1 | 101.2 |
| Rank | Rank 1 of 92 | Rank 23 of 92 |
| Price per 1M tokens | ||
| Inputwhat you send | $4 | $3 |
| Outputwhat the model writes | $20 | $15 |
| Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included) | $0.11 | $0.055 |
| Speed | ||
| Tokens per second | 106 | 39 |
| Popularity | ||
| Popularitysearch, usage and mentions, 0 to 100 | 68Rank 8 of 785 | 67Rank 12 of 785 |
| 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 22, 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 112.9, rank 11$2 input and $10 output per 1M tokens
Opus 5.5 vs. Kimi K3.1 ProOverall index 122.8, rank 4$2 input and $10 output per 1M tokens
Opus 5.5 vs. Claude Sonnet 5.5Shared 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 Opus 5.5B: Kimi K3
Show 54 more benchmarks
More comparisons
Compare Claude Opus 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 Opus 5.5 vs. GPT-6 Astra
- 2Claude Opus 5.5 vs. Claude Sonnet 5.5
- 3Claude Opus 5.5 vs. DeepSeek-V4-Pro
- 4Claude Opus 5.5 vs. Kimi K3.1 Pro
- 5Claude Opus 5.5 vs. Gemini 4 Argon
- 6Claude Opus 5.5 vs. Gemini 3.8 Flash
- 7Claude Opus 5.5 vs. Claude Fable 5.1
- 8Claude Opus 5.5 vs. DeepSeek-V4.1-Flash
- 9Claude Opus 5.5 vs. Qwen 3.8 Max 0902
Show all 66 comparisons
- 10Claude Opus 5.5 vs. GLM-5.3-Flash
- 11Claude Opus 5.5 vs. GPT-6.1 Sol
- 12Claude Opus 5.5 vs. Claude Sonnet 5
- 13Claude Opus 5.5 vs. Claude Haiku 5.5
- 14Claude Opus 5.5 vs. GLM-5.3
- 15GPT-6 Astra vs. Kimi K3
- 16Claude Opus 5.5 vs. GPT-5.6 Terra
- 17Claude Opus 5.5 vs. Gemini 3.1 Pro Preview
- 18Claude Opus 5.5 vs. Claude Opus 4.6
- 19Claude Opus 5.5 vs. Claude Sonnet 4.6
- 20Claude Opus 5.5 vs. Qwen 3.8 27B
- 21Claude Opus 5.5 vs. Grok 4.6
- 22Claude Opus 5.5 vs. GLM-5.2
- 23Claude Opus 5.5 vs. Gemini 4 Carbon
- 24Claude Opus 5.5 vs. DeepSeek V4.1 Flash 1017
- 25Claude Opus 5.5 vs. Claude Sonnet 4.5
- 26Claude Sonnet 5.5 vs. Kimi K3
- 27Claude Opus 5.5 vs. Muse Spark 1.3
- 28Claude Opus 5.5 vs. Claude Opus 4.8
- 29Grok 4.7 vs. Kimi K3
- 30Claude Opus 5.5 vs. GPT-5.6 Luna
- 31GPT-6.1 Sol vs. Kimi K3
- 32Claude Opus 5.5 vs. Mistral Large 4
- 33Gemini 3.1 Pro Preview vs. Kimi K3
- 34Claude Opus 5.5 vs. GPT-5.6 Sol
- 35Claude Opus 5.5 vs. GPT-5.5
- 36Claude Opus 5 vs. Kimi K3
- 37Claude Opus 5.5 vs. DeepSeek-V4-Flash
- 38GPT-6.1 Terra vs. Kimi K3
- 39Claude Opus 5.5 vs. Grok 4.7
- 40DeepSeek V4.1 Flash 1017 vs. Kimi K3
- 41Claude Opus 5.5 vs. Mistral Large 3
- 42Claude Opus 5.5 vs. GPT-6 Luna
- 43DeepSeek-V4-Pro vs. Kimi K3
- 44Claude Opus 5.5 vs. Claude Opus 4.5
- 45Kimi K3 vs. GLM-5.3-Flash
- 46DeepSeek-V4.1-Flash vs. Kimi K3
- 47Claude Opus 5.5 vs. Claude Fable 5
- 48Claude Opus 5.5 vs. GPT-6 Sol
- 49GPT-6 Sol vs. Kimi K3
- 50Claude Opus 5.5 vs. Gemini 3.6 Flash
- 51Claude Opus 5.5 vs. Mistral Medium 3.5
- 52Claude Opus 5.5 vs. Muse Wonder Full
- 53DeepSeek-V4-Flash vs. Kimi K3
- 54Claude Opus 5.5 vs. Claude Haiku 4.5
- 55Muse Spark 1.3 vs. Kimi K3
- 56Kimi K3 vs. Mistral Large 4
- 57Claude Opus 5.5 vs. Gemini 3.5 Flash
- 58Claude Opus 5.5 vs. GPT-6.1 Terra
- 59Claude Fable 5 vs. Kimi K3
- 60Claude Opus 5.5 vs. GPT-5.4
- 61Kimi K3 vs. GLM-5.3
- 62Claude Opus 5.5 vs. GLM-5.1
- 63Claude Opus 4.8 vs. Kimi K3
- 64GPT-5.4 vs. Kimi K3
- 65Gemini 4 Argon vs. Kimi K3
- 66Muse Wonder Full vs. Kimi K3