GPT-6 Luna vs Kimi K2 Thinking
| Signal | GPT-6 Luna | Delta | Kimi K2 Thinking |
|---|---|---|---|
Capabilities | 100 | +33 | |
Pricing | 100 | +2 | |
Context window size | 96 | +10 | |
Recency | 100 | +26 | |
Output Capacity | 82 | +2 | |
| Overall Result | 5 wins | of 5 | 0 wins |
Score History
40
current score
Tied
right now
40
current score
GPT-6 Luna
OpenAI
Kimi K2 Thinking
Moonshot AI
GPT-6 Luna saves you $150.00/month
That's $1800.00/year compared to Kimi K2 Thinking at your current usage level of 100K calls/month.
| Metric | GPT-6 Luna | Kimi K2 Thinking | Winner |
|---|---|---|---|
| Overall Score | 40 | 40 | -- |
| Rank | #237 | #360 | GPT-6 Luna |
| Quality Rank | #237 | #360 | GPT-6 Luna |
| Adoption Rank | #237 | #360 | GPT-6 Luna |
| Parameters | -- | -- | -- |
| Context Window | 1050K | 262K | GPT-6 Luna |
| Pricing | $0.10/$0.50/M | $0.60/$2.50/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 67 | GPT-6 Luna |
| Pricing | 100 | 98 | GPT-6 Luna |
| Context window size | 96 | 86 | GPT-6 Luna |
| Recency | 100 | 75 | GPT-6 Luna |
| Output Capacity | 82 | 80 | GPT-6 Luna |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 40/100 (rank #237), placing it in the top 19% of all 290 models tracked.
Scores 40/100 (rank #360), placing it in the top -24% of all 290 models tracked.
With only a 0-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
Choose GPT-6 Luna when you need:
- High-volume production workloads where API costs must be minimized
- Processing long documents or large codebases (1050K token context)
- Multimodal workflows that require image understanding
- Step-by-step reasoning and chain-of-thought problem solving
Choose Kimi K2 Thinking when you need:
- Step-by-step reasoning and chain-of-thought problem solving
- Self-hosted deployments where you need full control over the model
GPT-6 Luna offers 81% better value per quality point. At 1M tokens/day, you'd spend $9.00/month with GPT-6 Luna vs $46.50/month with Kimi K2 Thinking - a $37.50 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. GPT-6 Luna also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1050K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($0.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (40/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
GPT-6 Luna and Kimi K2 Thinking are extremely close in overall performance (only 0 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
By Use Case
Best for Quality
GPT-6 Luna
Marginally better benchmark scores; both are excellent
Best for Cost
GPT-6 Luna
81% lower pricing; better value at scale
Best for Reliability
GPT-6 Luna
Higher uptime and faster response speeds
Best for Prototyping
GPT-6 Luna
Stronger community support and better developer experience
Best for Production
GPT-6 Luna
Wider enterprise adoption and proven at scale
by OpenAI
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Cost - 81% lower pricing; better value at scale
- Choose for Reliability - Higher uptime and faster response speeds
- Choose for Prototyping - Stronger community support and better developer experience
- Choose for Production - Wider enterprise adoption and proven at scale
| Capability | GPT-6 Luna | Kimi K2 Thinking |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Searchdiffers | ||
| Image Output |
GPT-6 Luna
OpenAI
Kimi K2 Thinking
Moonshot AI
GPT-6 Luna saves you $3.30/month
That's 81% cheaper than Kimi K2 Thinking at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | GPT-6 Luna | Kimi K2 Thinking |
|---|---|---|
| Context Window | 1.1M | 262K |
| Max Output Tokens | 128,000 | 98,304 |
| Open Source | No | Yes |
| Created | Sep 22, 2026 | Nov 6, 2025 |