MoonshotAI: Kimi K3 vs OpenAI: GPT-5.6 Luna (batch)
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of MoonshotAI: Kimi K3 at #13. OpenAI: GPT-5.6 Luna (batch) is cheaper on input tokens at $0.10/1M vs $3/1M for MoonshotAI: Kimi K3. OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
MoonshotAI: Kimi K3 vs OpenAI: GPT-5.6 Luna (batch): which should you use?
Choose MoonshotAI: Kimi K3 if…
- It accepts video input, which OpenAI: GPT-5.6 Luna (batch) does not.
- It is the newer model — released Jul 2026 against Jul 2026.
Choose OpenAI: GPT-5.6 Luna (batch) if…
- It sees more real traffic — #3 overall on OpenRouter's weekly ranking, against #13 for MoonshotAI: Kimi K3.
- Cheaper to read — $0.10 vs $3 per 1M input tokens, which is what dominates long-prompt and RAG workloads.
- Cheaper to write — $0.60 vs $15 per 1M output tokens, the line item that decides generation-heavy costs.
- Bigger context window — 1.1M vs 1M tokens.
- It accepts file input, which MoonshotAI: Kimi K3 does not.
Spec Comparison
| Spec | MoonshotAI: Kimi K3 | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Author | moonshotai | openai |
| Input price (per 1M tokens) | $3 | $0.10 |
| Output price (per 1M tokens) | $15 | $0.60 |
| Context window | 1M | 1.1M |
| Input modalities | text, image, video | file, image, text |
| Output modalities | text | text |
| AA Intelligence | 59.7 | — |
| AA Coding | 76.2 | — |
| AA Agentic | 54.3 | — |
| Released | Jul 2026 | Jul 2026 |
What MoonshotAI: Kimi K3 and OpenAI: GPT-5.6 Luna (batch) actually cost to run
On a read-heavy job — 1M tokens in, 100K out — MoonshotAI: Kimi K3 costs $4.50 and OpenAI: GPT-5.6 Luna (batch) costs $0.16.
Flip the shape — 100K in, 1M out — and it becomes $15 for MoonshotAI: Kimi K3 versus $0.61 for OpenAI: GPT-5.6 Luna (batch).
Both figures are the published per-token rates multiplied out; caching and batch discounts are not included.
Usage Rank by Task
| Task | MoonshotAI: Kimi K3 | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Overall | #13 | #3 |
| Multi-step Planning | #10 | #6 |
| Tool Dispatch | — | #4 |
| Web Search | — | #9 |
| Agent Workflows | — | #7 |
| Classification & Tagging | — | #3 |
| Debugging | — | #7 |
| DevOps Config | — | #6 |
| File Read/Write | — | #6 |
| Frontend UI | — | #5 |
| Code Implementation | — | #5 |
| Repo Analysis | #10 | #5 |
| Code Review & Security | #7 | #5 |
| SQL & Database | — | #5 |
| Content Writing | — | #8 |
About MoonshotAI: Kimi K3 and OpenAI: GPT-5.6 Luna (batch)
MoonshotAI: Kimi K3
Built by moonshotai · released Jul 2026 · 1M-token context
Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI. It is suited for complex coding, knowledge work, and long-horizon agentic workflows, and is particularly strong at...
OpenAI: GPT-5.6 Luna (batch)
Built by openai · released Jul 2026 · 1.1M-token context
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...
Related comparisons
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- MoonshotAI: Kimi K3 vs Tencent: Hy3
- MoonshotAI: Kimi K3 vs DeepSeek: DeepSeek V4 Flash 0423
- OpenAI: GPT-5.6 Luna (batch) vs DeepSeek: DeepSeek V4 Flash 0731
- OpenAI: GPT-5.6 Luna (batch) vs Tencent: Hy3
- OpenAI: GPT-5.6 Luna (batch) vs DeepSeek: DeepSeek V4 Flash 0423
Get notified when MoonshotAI: Kimi K3 or OpenAI: GPT-5.6 Luna (batch) moves
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FAQ
Which is better, MoonshotAI: Kimi K3 or OpenAI: GPT-5.6 Luna (batch)?
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of MoonshotAI: Kimi K3 at #13. OpenAI: GPT-5.6 Luna (batch) is cheaper on input tokens at $0.10/1M vs $3/1M for MoonshotAI: Kimi K3. OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
Which is cheaper, MoonshotAI: Kimi K3 or OpenAI: GPT-5.6 Luna (batch)?
OpenAI: GPT-5.6 Luna (batch) is cheaper at $0.10 per 1M input tokens. Output pricing: MoonshotAI: Kimi K3 $15, OpenAI: GPT-5.6 Luna (batch) $0.60.
Which is better for coding, MoonshotAI: Kimi K3 or OpenAI: GPT-5.6 Luna (batch)?
OpenAI: GPT-5.6 Luna (batch). Best coding-task usage rank this week: MoonshotAI: Kimi K3 #7, OpenAI: GPT-5.6 Luna (batch) #5.
Is OpenAI: GPT-5.6 Luna (batch) still ahead of MoonshotAI: Kimi K3 right now?
Yes. For the week of 2026-08-10, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall on OpenRouter usage against #13 for MoonshotAI: Kimi K3. Ranks refresh weekly, and the verdict on this page flips if they cross.
Usage ranks are weekly data aggregated by OpenRouter. Prices are USD per 1M tokens.