Chat with Kimi K3 for free
Kimi K3 is Moonshot's open-weight frontier model: native vision, a 1M-token context window and strong agentic coding. Start typing, no sign-up needed.
See how Kimi K3 thinks
Pick a task and watch a sample answer stream in. Open the same prompt in Chatday when you’re ready.
The bug is in the arrow body: u.id = id assigns instead of compares, so the callback returns the assigned value and .find never matches the way you expect.
Fix it with a strict comparison:
Use === to compare. A single = is assignment, which is why you saw undefined.
What makes Kimi K3 stand out
Kimi K3 specifications
| Provider | Moonshot |
| Model family | Kimi K3 series |
| Context window | 1,000,000 tokens |
| Max output | 131,072 tokens |
| Modality | Text · Vision · Code |
| Input price | $3 / 1M tokens |
| Output price | $15 / 1M tokens |
| Tool / function calling | Yes |
| Vision | Yes |
| Streaming | Yes |
| Available in Chatday | Free & Pro |
Pricing shown for reference; usage is included in your Chatday plan.
Kimi K3 vs other top models
| Model | Context | Best at | Input price | In Chatday |
|---|---|---|---|---|
| Kimi K3 | 1M | Open-weight multimodal | $3/M | Free |
| Grok 4.6 | 500K | Agentic reasoning | $2/M | Free |
| Claude Opus 5 | 1M | Frontier agents | $5/M | Free |
| GPT-5.6 | 1.1M | Flagship reasoning | $2/M | Free |
Kimi K3 questions
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Claude Opus 5 is Anthropic's strongest Opus model: hybrid reasoning for long-running agents, serious coding and computer use.
GPT-5.6
GPT-5.6 is OpenAI's newest flagship for hard, multi-step reasoning, coding and tool use, the default when problems get genuinely difficult.
Chat with Kimi K3 and switch models any time.
One subscription, every leading model. Start free in the Chatday web app.