Open vs. closed · tracked daily
Open-source AI now handles 74% of real usage
As of August 8, 2026, open-weight models account for 74.4% of real token volume routed through OpenRouter, versus 25.6% for closed models - up 5 points since July 5, 2026. This is measured directly from production traffic, not a survey or an estimate, and is tracked daily rather than published as a one-off snapshot.
- Open-source share - 74.4%
- Closed share - 25.6%
- Best open model - MoonshotAI: Kimi K3 (59.7)
- Best closed model - Claude Opus 5 (batch) (63.1)
Usage share, open vs. closed
- Open-source
- Closed
Index date August 8, 2026Data through 00:00 UTC August 9, 2026Calculated 08:38 UTC
The quality gap
The best open model (MoonshotAI: Kimi K3) currently scores 59.7on Artificial Analysis's Intelligence Index, versus 63.1 for the best closed model (Claude Opus 5 (batch)) - a gap of 3.4 points. This gap is tracked daily and will show whether open models are closing it over time.
| # | Model | Intelligence index (best model) |
|---|---|---|
| 01 | Best closed | 63 |
| 02 | Best open | 60 |
Daily tracking began Aug 9- this becomes a live chart once there's a third day to plot.
"Open" / "closed" is classified by publisher, not model-by-model license text - a curated author list (e.g. Meta, DeepSeek, Mistral, Qwen = open; OpenAI, Anthropic, Google Gemini, xAI = closed), documented in server/weights-class.ts. A small number of niche providers aren't yet classified and are excluded from the totals.
Frequently asked questions
Are open-source AI models catching up to closed models?
As of August 8, 2026, open-weight models handle 74% of real token volume on OpenRouter, up 5 percentage points since July 5, 2026. The best open model (MoonshotAI: Kimi K3) trails the best closed model (Claude Opus 5 (batch)) by 3.4 intelligence-index points.
What share of AI usage is open source right now?
74.4% of real OpenRouter token volume went to open-weight models as of August 8, 2026; 25.6% went to closed models.
What is the best open-source AI model right now?
MoonshotAI: Kimi K3 currently leads open-weight models with an Artificial Analysis Intelligence Index of 59.7.
Source: OpenRouter (openrouter.ai/rankings), as of August 9, 2026.
Benchmark scores: Artificial Analysis (artificialanalysis.ai) via OpenRouter (openrouter.ai/rankings).
Methodology: smophy.ai/benchmark/methodology
Token counts originate from each provider's own tokenizer and are not directly comparable across providers.