Claude Opus 5.5vs.Kimi K3.1 Pro
Which one is better?
Claude Opus 5.5 is clearly ahead in the overall index, but costs twice as much per token.
96
Claude Opus 5.5
Rank 1 to 2
80
Kimi K3.1 Pro
Rank 10 to 13
98
Claude Opus 5.5
fairly fast
36
Kimi K3.1 Pro
slow
$8
Claude Opus 5.5
expensive
$4
Kimi K3.1 Pro
fairly expensive
Claude Opus 5.5
- Subscription
At Anthropic from €21.42 a month (Claude Pro). Through other providers from ≈ €6.36 a month (ElevenLabs Starter, with limited credits). 70 plans in Germany.
- Via API
$4 input, $20 output per 1M tokens, unchanged since Sep 24, 2026.
Kimi K3.1 Pro
- Subscription
At Moonshot AI from ≈ €20.14 a month (Kimi Plus, with limited credits). 4 plans in Germany.
- Via API
$2 input, $10 output per 1M tokens.
Overall index with data through Oct 29, 2026 · Prices from Oct 29, 2026 · Speed: measured by Artificial Analysis · Subscriptions as of Oct 24, 2026 · Subscription prices incl. VAT
Where is the difference?
Values from 0 to 100 per task area. We only name a winner when the gap is large enough and there are enough tests.
Opus 5.5 ahead: 7Kimi K3.1 Pro ahead: 0level: 2too little data: 1of 10 areas
AreaOpus 5.5Kimi K3.1 Pro0 to 100, higher is betterResult
Areas in the overall index
CodingOpus 5.5 aheadOpus 5.5: 98Kimi K3.1 Pro: 85
ReasoninglevelOpus 5.5: 95Kimi K3.1 Pro: 80
MathematicsOpus 5.5 aheadOpus 5.5: above 99Kimi K3.1 Pro: 81
KnowledgeOpus 5.5 aheadOpus 5.5: above 99Kimi K3.1 Pro: 85
AgentslevelOpus 5.5: 86Kimi K3.1 Pro: 80
GeneralOpus 5.5 aheadOpus 5.5: 94Kimi K3.1 Pro: 74
MultimodalOpus 5.5 aheadOpus 5.5: 93Kimi K3.1 Pro: 75
Specialist fields
FinanceOpus 5.5 aheadOpus 5.5: 92Kimi K3.1 Pro: 62
LegalOpus 5.5 aheadOpus 5.5: 92Kimi K3.1 Pro: 68
Healthonly Opus 5.5 has a scoreOpus 5.5: 91Kimi K3.1 Pro: not enough data
Show 4 more areas that do not count toward the overall index
AreaOpus 5.5Kimi K3.1 Pro0 to 100, higher is betterResult
Cybersecurityonly Opus 5.5 has a scoreOpus 5.5: 84Kimi K3.1 Pro: not enough data
Searchonly Opus 5.5 has a scoreOpus 5.5: 84Kimi K3.1 Pro: not enough data
Productivityonly Opus 5.5 has a scoreOpus 5.5: 95Kimi K3.1 Pro: not enough data
Educationonly Opus 5.5 has a scoreOpus 5.5: 97Kimi K3.1 Pro: not enough data
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.
Pelican on a bicycle
A community classic for free-form SVG drawing.
Claude Opus 5.5
Reasoning (requested): high
Current attempt
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- anthropic/claude-opus-5.5
- API model reported in response
- anthropic/claude-opus-5.5
- Reasoning setting
- high
- Pinned endpoint
- Anthropic | anthropic/claude-opus-5.5-20260921
- Temperature
- Provider default
- Token limit including reasoning
- 8,192 tokens
- Test protocol
- community-visual-tests-v1
- Technical checks
- Passed, not a quality rating
- Response time
- 33.2 s
Visually reviewed. This individual test does not establish overall model quality.
Kimi K3.1 Pro
Not tested yet
Prompt and test conditions
Generate an SVG of a pelican riding a bicycle
Token limit including reasoning: 8,192 tokens
Task origin (Simon Willison)SVG short test
There is no shared test round for this selection. Results from different rounds are not mixed.
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 K3.1 Pro |
|---|---|---|
| Intelligence | ||
| Overall index0 to 100, higher is better | 96 | 80 |
| Rank | Rank 1 to 2 of 95 | Rank 10 to 13 of 95 |
| Price per 1M tokens | ||
| Inputwhat you send | $4 | $2 |
| Outputwhat the model writes | $20 | $10 |
| Speed | ||
| Tokens per second | 98 | 36 |
| 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 | Oct 23, 2026 |
| Availability | Active | Active |
| Open weights | no | n/a |
- Kimi K3.1 Pro, API price listed by Artificial Analysis: $2 input, $10 output, and $0.20 cached input per 1 million tokens. Kimi's official API publishes CNY rates separately. Source
- Kimi K3.1 Pro, Official API pricing: K3.1 Pro: CNY 13 input, CNY 68 output, CNY 13 cache write, and CNY 1.30 cache hit per million tokens. Source
- Kimi K3.1 Pro, Highspeed API pricing: CNY 26 input, CNY 136 output, CNY 26 cache write, and CNY 1.30 cache hit per million tokens. Source
- Kimi K3.1 Pro, International API pricing in USD: The international Kimi platform lists $2 input, $10 output, $2 cache write and $0.20 cache hit per million tokens. Highspeed costs $4/$20/$4/$0.20. Checked October 29, 2026. Separately documented CNY tariffs remain separate observations. Source
Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis
Shared 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 K3.1 Pro
BioMysteryBenchOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 79.3%Kimi K3.1 Pro: 75.6%Vals AIAs of 10/24/2026
EMB v1.1Overall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 75.8%Kimi K3.1 Pro: 70%Vals AIAs of 10/26/2026
Finance Agent v2.1Overall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 67.8%Kimi K3.1 Pro: 61.5%Vals AIAs of 10/26/2026
HLAB-Vals-1.1Overall · Task fully resolved · higher is betterTest setup not documented as identicalClaude Opus 5.5: 9.2%Kimi K3.1 Pro: 11.7%Vals AIAs of 10/26/2026
IOIOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 95.1%Kimi K3.1 Pro: 81.9%Vals AIAs of 10/24/2026
Legal Research BenchOverall · All-pass · higher is betterTest setup not documented as identicalClaude Opus 5.5: 50.5%Kimi K3.1 Pro: 37.5%Vals AIAs of 10/26/2026
MysteryMechanismOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 49.6%Kimi K3.1 Pro: 26.1%Vals AIAs of 10/24/2026
ProofBench v1.1Overall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 100%Kimi K3.1 Pro: 91%Vals AIAs of 10/24/2026
Tax Agent BenchOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 45.6%Kimi K3.1 Pro: 24.9%Vals AIAs of 10/26/2026
Terminal-Bench 4.0Overall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 65.2%Kimi K3.1 Pro: 63.6%Vals AIAs of 10/26/2026
Show 54 more benchmarks
Terminal-Bench-ScienceOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 47.1%Kimi K3.1 Pro: 31.4%Vals AIAs of 10/25/2026
Vals Finance IndexOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 65.6%Kimi K3.1 Pro: 56%Vals AIAs of 10/26/2026
Vals IndexOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 70.2%Kimi K3.1 Pro: 62.5%Vals AIAs of 10/27/2026
Vals Legal IndexOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 72.3%Kimi K3.1 Pro: 67%Vals AIAs of 10/26/2026
Vals Science IndexOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 58.7%Kimi K3.1 Pro: 44.4%Vals AIAs of 10/25/2026
Vibe Code Bench v1.1Overall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 90.3%Kimi K3.1 Pro: 84.9%Vals AIAs of 10/26/2026
BioMysteryBenchHard · higher is betterTest setup not documented as identicalClaude Opus 5.5: 47.1%Kimi K3.1 Pro: 29.4%Vals AIAs of 10/24/2026
EMB v1.1Comps · higher is betterTest setup not documented as identicalClaude Opus 5.5: 75.7%Kimi K3.1 Pro: 67.4%Vals AIAs of 10/26/2026
Finance Agent v2.1Adjustments · higher is betterTest setup not documented as identicalClaude Opus 5.5: 67.1%Kimi K3.1 Pro: 57.4%Vals AIAs of 10/26/2026
HLAB-Vals-1.1Antitrust Competition · Criteria passed · higher is betterTest setup not documented as identicalClaude Opus 5.5: 88.4%Kimi K3.1 Pro: 90.4%Vals AIAs of 10/26/2026
IOIIOI 2024 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 100%Kimi K3.1 Pro: 100%Vals AIAs of 10/24/2026
Legal Research BenchAdministrative / Regulatory · All-pass · higher is betterTest setup not documented as identicalClaude Opus 5.5: 65.2%Kimi K3.1 Pro: 56.1%Vals AIAs of 10/26/2026
Tax Agent BenchControversy & Precedence Analysis · higher is betterTest setup not documented as identicalClaude Opus 5.5: 30%Kimi K3.1 Pro: 10%Vals AIAs of 10/26/2026
Terminal-Bench 4.0Hardware · higher is betterTest setup not documented as identicalClaude Opus 5.5: 60%Kimi K3.1 Pro: 40%Vals AIAs of 10/26/2026
Terminal-Bench-ScienceEarth Sciences · higher is betterTest setup not documented as identicalClaude Opus 5.5: 37.5%Kimi K3.1 Pro: 12.5%Vals AIAs of 10/25/2026
Vals Finance IndexEMB v1.1 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 75.8%Kimi K3.1 Pro: 70%Vals AIAs of 10/26/2026
Vals IndexCode Migration v1.1 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 80.5%Kimi K3.1 Pro: 59.7%Vals AIAs of 10/27/2026
Vals Legal IndexBusiness & Commercial · higher is betterTest setup not documented as identicalClaude Opus 5.5: 69.2%Kimi K3.1 Pro: 59.8%Vals AIAs of 10/26/2026
Vals Science IndexBioMysteryBench · higher is betterTest setup not documented as identicalClaude Opus 5.5: 79.3%Kimi K3.1 Pro: 75.6%Vals AIAs of 10/25/2026
BioMysteryBenchHuman-solvable · higher is betterTest setup not documented as identicalClaude Opus 5.5: 86.8%Kimi K3.1 Pro: 86.3%Vals AIAs of 10/24/2026
EMB v1.1Dataroom · higher is betterTest setup not documented as identicalClaude Opus 5.5: 86.2%Kimi K3.1 Pro: 87.6%Vals AIAs of 10/26/2026
Finance Agent v2.1All-Pass · higher is betterTest setup not documented as identicalClaude Opus 5.5: 56.3%Kimi K3.1 Pro: 48.4%Vals AIAs of 10/26/2026
HLAB-Vals-1.1Antitrust Competition · Task fully resolved · higher is betterTest setup not documented as identicalClaude Opus 5.5: 0%Kimi K3.1 Pro: 0%Vals AIAs of 10/26/2026
IOIIOI 2025 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 100%Kimi K3.1 Pro: 75.5%Vals AIAs of 10/24/2026
Legal Research BenchAdministrative / Regulatory · Weighted partial credit · higher is betterTest setup not documented as identicalClaude Opus 5.5: 85.4%Kimi K3.1 Pro: 81.9%Vals AIAs of 10/26/2026
Tax Agent BenchControversy & Precedence Analysis · higher is betterTest setup not documented as identicalClaude Opus 5.5: 66.9%Kimi K3.1 Pro: 58%Vals AIAs of 10/26/2026
Terminal-Bench 4.0Media · higher is betterTest setup not documented as identicalClaude Opus 5.5: 75%Kimi K3.1 Pro: 58.3%Vals AIAs of 10/26/2026
Terminal-Bench-ScienceEngineering Sciences · higher is betterTest setup not documented as identicalClaude Opus 5.5: 22.2%Kimi K3.1 Pro: 22.2%Vals AIAs of 10/25/2026
Vals Finance IndexFinance Agent v2.1 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 67.8%Kimi K3.1 Pro: 61.5%Vals AIAs of 10/26/2026
Vals IndexEMB v1.1 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 75.8%Kimi K3.1 Pro: 70%Vals AIAs of 10/27/2026
Vals Legal IndexCivil Negligence · higher is betterTest setup not documented as identicalClaude Opus 5.5: 70.2%Kimi K3.1 Pro: 62.4%Vals AIAs of 10/26/2026
Vals Science IndexMysteryMechanism · higher is betterTest setup not documented as identicalClaude Opus 5.5: 49.6%Kimi K3.1 Pro: 26.1%Vals AIAs of 10/25/2026
EMB v1.1DCF · higher is betterTest setup not documented as identicalClaude Opus 5.5: 69.9%Kimi K3.1 Pro: 64.4%Vals AIAs of 10/26/2026
Finance Agent v2.1Comparables · higher is betterTest setup not documented as identicalClaude Opus 5.5: 57.3%Kimi K3.1 Pro: 63.9%Vals AIAs of 10/26/2026
HLAB-Vals-1.1Arbitration International Dispute Resolution · Criteria passed · higher is betterTest setup not documented as identicalClaude Opus 5.5: 91.6%Kimi K3.1 Pro: 94.1%Vals AIAs of 10/26/2026
IOIIOI 2026 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 85.2%Kimi K3.1 Pro: 70.2%Vals AIAs of 10/24/2026
Legal Research BenchBusiness & Commercial · All-pass · higher is betterTest setup not documented as identicalClaude Opus 5.5: 48.8%Kimi K3.1 Pro: 27.9%Vals AIAs of 10/26/2026
Tax Agent BenchCurrent & Temporal Analysis · higher is betterTest setup not documented as identicalClaude Opus 5.5: 46.6%Kimi K3.1 Pro: 36.7%Vals AIAs of 10/26/2026
Terminal-Bench 4.0ML · higher is betterTest setup not documented as identicalClaude Opus 5.5: 81.8%Kimi K3.1 Pro: 81.8%Vals AIAs of 10/26/2026
Terminal-Bench-ScienceLife Sciences · higher is betterTest setup not documented as identicalClaude Opus 5.5: 52.6%Kimi K3.1 Pro: 36.8%Vals AIAs of 10/25/2026
Vals Finance IndexTax Agent Bench · higher is betterTest setup not documented as identicalClaude Opus 5.5: 45.6%Kimi K3.1 Pro: 24.9%Vals AIAs of 10/26/2026
Vals IndexFinance Agent v2.1 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 67.8%Kimi K3.1 Pro: 61.5%Vals AIAs of 10/27/2026
Vals Legal IndexCriminal · higher is betterTest setup not documented as identicalClaude Opus 5.5: 62.7%Kimi K3.1 Pro: 60.3%Vals AIAs of 10/26/2026
Vals Science IndexTerminal-Bench-Science · higher is betterTest setup not documented as identicalClaude Opus 5.5: 47.1%Kimi K3.1 Pro: 31.4%Vals AIAs of 10/25/2026
EMB v1.1LBO · higher is betterTest setup not documented as identicalClaude Opus 5.5: 68.3%Kimi K3.1 Pro: 55.2%Vals AIAs of 10/26/2026
Finance Agent v2.1Disclosure Analysis · higher is betterTest setup not documented as identicalClaude Opus 5.5: 74.4%Kimi K3.1 Pro: 70.1%Vals AIAs of 10/26/2026
HLAB-Vals-1.1Arbitration International Dispute Resolution · Task fully resolved · higher is betterTest setup not documented as identicalClaude Opus 5.5: 10%Kimi K3.1 Pro: 10%Vals AIAs of 10/26/2026
Legal Research BenchBusiness & Commercial · Weighted partial credit · higher is betterTest setup not documented as identicalClaude Opus 5.5: 71%Kimi K3.1 Pro: 66.3%Vals AIAs of 10/26/2026
Tax Agent BenchCurrent & Temporal Analysis · higher is betterTest setup not documented as identicalClaude Opus 5.5: 73.3%Kimi K3.1 Pro: 64.8%Vals AIAs of 10/26/2026
Terminal-Bench 4.0Operations · higher is betterTest setup not documented as identicalClaude Opus 5.5: 29.6%Kimi K3.1 Pro: 55.6%Vals AIAs of 10/26/2026
Terminal-Bench-ScienceMathematical Sciences · higher is betterTest setup not documented as identicalClaude Opus 5.5: 58.8%Kimi K3.1 Pro: 23.5%Vals AIAs of 10/25/2026
Vals IndexHLAB-Vals-1.1 · higher is betterTest setup not documented as identicalClaude Opus 5.5: 9.2%Kimi K3.1 Pro: 11.7%Vals AIAs of 10/27/2026
Vals Legal IndexFamily · higher is betterTest setup not documented as identicalClaude Opus 5.5: 22.7%Kimi K3.1 Pro: 13.6%Vals AIAs of 10/26/2026
EMB v1.1M&A · higher is betterTest setup not documented as identicalClaude Opus 5.5: 82.1%Kimi K3.1 Pro: 78.1%Vals AIAs of 10/26/2026
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