Claude Sonnet 4.5vs.Kimi K3.1 Pro
Which one is better?
Kimi K3.1 Pro is clearly ahead in the overall index and is cheaper too: Claude Sonnet 4.5 costs 1.5 times as much per token.
Claude Sonnet 4.5
Rank 62 to 76
Kimi K3.1 Pro
Rank 10 to 13
Claude Sonnet 4.5
slow
Kimi K3.1 Pro
slow
Claude Sonnet 4.5
expensive
Kimi K3.1 Pro
fairly expensive
Claude Sonnet 4.5
- Subscription
No Anthropic subscription includes this model. Through other providers from ≈ €6.36 a month (ElevenLabs Starter, with limited credits). 44 plans in Germany.
- Via API
$3 input, $15 output per 1M tokens, unchanged since our price tracking began on Aug 14, 2026.
- Note
- There is a successor: Claude Sonnet 4.6 (rank 43 to 54, same price).
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.
Sonnet 4.5 ahead: 0Kimi K3.1 Pro ahead: 4level: 0too little data: 6of 10 areas
Show 1 more areas that do not count toward the overall index
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 Sonnet 4.5
Reasoning (requested): high
Current attempt
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- anthropic/claude-sonnet-4.5
- API model reported in response
- anthropic/claude-sonnet-4.5
- Reasoning setting
- high
- Pinned endpoint
- Anthropic | anthropic/claude-4.5-sonnet-20250929
- 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
- 30.2 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 Sonnet 4.5 | Kimi K3.1 Pro |
|---|---|---|
| Intelligence | ||
| Overall index0 to 100, higher is better | below 1 | 80 |
| Rank | Rank 62 to 76 of 95 | Rank 10 to 13 of 95 |
| Price per 1M tokens | ||
| Inputwhat you send | $3 | $2 |
| Outputwhat the model writes | $15 | $10 |
| Speed | ||
| Tokens per second | 48 | 36 |
| Technical | ||
| Context windowhow much text the model reads at once | 200,000 tokens≈ 300 A4 pages | 1.05 M tokens≈ 1,570 A4 pages |
| Knowledge cutoff | January 2025 | n/a |
| Released | September 2025 | 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.
No directly comparable result yet
No published benchmark for Claude Sonnet 4.5 and Kimi K3.1 Pro currently matches in version, task and metric. We therefore show no estimated or blended values.
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