AI Recommendation
Should you use Kimi K3?
Kimi K3 is listed for chat workloads and supports a 1.0M context window.
Use it when OpenCode Zen's free tier is enough for evaluation, demos, or light production traffic.
Kimi K3 Free API on OpenCode Zen
Free API VerifiedMultimodal Kimi model with 1M context and toggleable max-effort thinking for long-horizon agent work
Free APIOpenAI compatibleReasoningTool callingJSON modeVisionReasoning
API Details
Copy-ready connection details
Base URL
https://opencode.ai/zen/v1 Model ID
kimi-k3 API format OpenAI Chat Completions
Technical Details
Kimi K3 specifications
Context window 1.0M
Max output 131K
Status Online
Family kimi-k3
Released Jul 16, 2026
Last updated Jul 16, 2026
Free listing since Sep 19, 2026
Input text, image, video
Output text
Capabilities reasoning, tool calling, structured output, file attachments
Open weights Yes
External benchmark references
| Benchmark | Score | Metric | Date |
|---|---|---|---|
| DeepSWE | 67.5 | resolve rate | 2026-07-16 |
| Terminal-Bench | 88.3 | accuracy | 2026-07-16 |
| FrontierSWE | 81.2 | dominance score | 2026-07-16 |
| Program Bench | 77.8 | score | 2026-07-16 |
Best for
- Chat
Benchmark Overview
Benchmark signals for Kimi K3
Intelligence General reasoning and instruction following
43.8/100 Coding Programming and code generation
76.2/100 Agentic Tool use and multi-step tasks
50.6/100 Speed Observed generation speed
37 tok/s Context Maximum listed context window
1.0M Pricing
Kimi K3 pricing per 1M tokens
Input $3 per 1M tokens
Output $15 per 1M tokens
Access Available OpenCode Zen
Availability
Kimi K3 availability by provider
We only found this Kimi K3 listing on OpenCode Zen in the current catalog. Use the related models section for nearby alternatives.
| Provider | Model listing | Access | Context | API | Limits |
|---|---|---|---|---|---|
| | Kimi K3 | Free tier | 1.0M | Native | Varies |
Compare
Kimi K3 alternatives to consider
| Model | Provider | Context | Access |
|---|---|---|---|
| big-pickle | OpenCode Zen | N/A | Free tier |
| DeepSeek V4 Flash | OpenCode Zen | 1.0M | Check provider |
| MiMo-V2.5 | OpenCode Zen | 1.0M | Free tier |
| Nemotron 3 Ultra 550B A55B | OpenCode Zen | 1.0M | Free tier |
| North Mini Code | OpenCode Zen | 256K | Check provider |
Typical Use Cases
Kimi K3 use cases
Chat
Kimi K3 is tagged for chat in this catalog and works with OpenAI-compatible client libraries.
FAQ
Kimi K3 free API FAQ
Is Kimi K3 free to use?
Kimi K3 is listed with free API access on OpenCode Zen, subject to the provider's quota and account policy.
What is the Kimi K3 model ID?
The model ID shown in this catalog is kimi-k3.
What context window does Kimi K3 support?
The listed context window is 1.0M tokens with up to 131K output tokens.
More about Kimi K3
Free Kimi K3 API.
For API keys, setup steps, and provider-level limits, see the OpenCode Zen provider page.