Anthropic
Claude Sonnet 4 (latest)
Balanced Claude model for coding, analysis, agent workflows, and cost control
- Context
- 200K
- Max output
- 64K
- Input / 1M
- —
- Output / 1M
- —
- Output speed
- —
Accepts
- Text input
- Image input
- PDF input
Produces
- Text output
AI model comparison
Compare recorded price, context, output limits, speed, latency, capabilities, and input/output support. Every missing value stays visible, and unsourced benchmarks are excluded.
Claude Sonnet 4 (latest) and Kimi K3 both come up when teams are choosing a model for production work, and the honest answer usually depends on your workload rather than a leaderboard. This page puts their published specifications side by side — context window, token pricing, supported inputs and outputs — so you can see where they actually differ.
Anthropic
Balanced Claude model for coding, analysis, agent workflows, and cost control
Accepts
Produces
Moonshot AI
Moonshot's frontier model — 2.8 trillion parameters, a million-token window, and thinking effort you can dial up when the task deserves it.
Accepts
Produces
At a glance
This is a directional summary of the values recorded in this directory—not a universal quality verdict. Test the finalists on your own prompts before committing.
Where Claude Sonnet 4 (latest) leads in recorded data
No complete recorded factor currently favors this model. That does not establish lower real-world quality.
Where Kimi K3 leads in recorded data
Context capacity
Higher listed limit
Claude Sonnet 4 (latest):200K
Kimi K3:1.0M
Kimi K3
Maximum output
Higher listed limit
Claude Sonnet 4 (latest):64K
Kimi K3:131.1K
Kimi K3
Input price
Lower recorded price
Claude Sonnet 4 (latest):—
Kimi K3:$3.00
No complete comparison
Output price
Lower recorded price
Claude Sonnet 4 (latest):—
Kimi K3:$15.00
No complete comparison
Output speed
Higher recorded throughput
Claude Sonnet 4 (latest):—
Kimi K3:—
No complete comparison
Time to first token
Lower recorded latency
Claude Sonnet 4 (latest):—
Kimi K3:—
No complete comparison
Intelligence Index
Higher directory index
Claude Sonnet 4 (latest):—
Kimi K3:—
No complete comparison
Evidence
A score appears only when both records include a verified source. It is not treated as a universal ranking.
Specifications
| Specification | Claude Sonnet 4 (latest) | Kimi K3 |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Model family | claude-sonnet | kimi-k3 |
| Accepted inputs | text, image, pdf | text, image, video |
| Produced outputs | text | text |
| Context window | 200K | 1.0MRecorded lead |
| Max output | 64K | 131.1KRecorded lead |
| Intelligence Index | — | — |
| Input price / 1M | — | $3.00 |
| Output price / 1M | — | $15.00 |
| Output speed | — | — |
| Time to first token | — | — |
| Reasoning mode | Documented | Documented |
| Tool calling | Documented | Documented |
| Image input | Documented | Documented |
| Audio input | Not documented | Not documented |
| Structured output | Not documented | Documented |
| License | Proprietary | Open weights |
| Released | May 22, 2025 | Jul 16, 2026 |
Workload guidance
On the published numbers, Kimi K3 accepts the larger context window. Which matters more depends on whether your bottleneck is document size or spend — the table above has the exact figures.
Provenance
Prices and hosted performance can change. SyncDev records source references and clearly separates documented specifications from measured values; confirm commercial terms with the provider before deployment.
Claude Sonnet 4 (latest)
Anthropic · model record and recorded source
Kimi K3
Moonshot AI · model record and recorded source
Choose any two approved model records and review them with the same evidence rules.